All The Claims

1. A method for determining a voltage value output to a first input of a comparator, the comparator electrically connected to a pad, comprising:
probing the pad with a first probe to ground the pad via a first probing resistance;
probing the pad with a second probe to measure a voltage value from the pad;
providing a ramping voltage to a second input of the comparator; and
tuning a digital to analog converter to determine the voltage value output from the digital to analog converter to the first input of the comparator on a basis of a specific condition when a value of the ramping voltage is substantially equal to a sum of a predetermined reference voltage value and the voltage value of the pad.
2. The method of claim 1, wherein the comparator has a ground node electrically connected to the pad.
3. The method of claim 1, wherein the pad is grounded by the second probe via a second probing resistance.
4. The method of claim 1, wherein the first probing resistance is produced by a contact between the first probe and the pad.
5. The method of claim 1, further comprising:
probing the pad with a third probe to ground the pad via a third probing resistance.
6. The method of claim 1, further comprising:
probing the pad with a plurality of probes including the first probe wherein the pad is grounded by the plurality of probes via a plurality of probing resistances respectively corresponding to the plurality of probes.
7. The method of claim 1, wherein the comparator is an operational amplifier (OP-AMP).
8. The method of claim 1, wherein the step of measuring the voltage value of the pad is performed by connecting the second probe to a voltmeter via a high-impedance input provided by the voltmeter.
9. The method of claim 1, wherein the step of tuning the digital to analog converter is performed by way of adjusting a digital code input of the digital to analog converter to vary the voltage value output to the first input of the comparator.
10. The method of claim 1, wherein when the ramping voltage value is substantially equal to the sum of the predetermined reference voltage value and the voltage value of the pad, an output voltage of the comparator is inverted on different level thereby determining the voltage value of the first input of the comparator.
11. A method for determining a voltage value output to a first input of a comparator, the comparator having a ground node electrically connected to a first pad and a second pad, the method comprising:
probing the first pad with a first probe to ground the first pad via a first probing resistance;
probing the second pad with a second probe to ground the second pad via a second probing resistance;
probing the second pad with a third probe to measure a voltage value from the second pad;
providing a ramping voltage to a second input of the comparator; and
tuning a digital to analog converter (DAC) to determine the voltage value output to the first input of the comparator on a basis of a specific condition when a value of the ramping voltage is substantially equal to a sum of a predetermined reference voltage value and the voltage value of the second pad.
12. The method of claim 11, wherein the first pad is a ground pad and the second pad is a test pad.
13. The method of claim 11, wherein when the ramping voltage value is substantially equal to the sum of the predetermined reference voltage value and the voltage value of the pad, an output voltage of the comparator is inverted on different level thereby determining the voltage value of the first input of the comparator.
14. The method of claim 11, wherein the first probing resistance is produced by a non-ideal contact between the first probe and the first pad.
15. The method of claim 11, wherein the second probing resistance is produced by a non-ideal contact between the second probe and the second pad.
16. The method of claim 11, further comprising:
probing the second pad with a fourth probe to ground the second pad via a probing resistance corresponding to the fourth probe.
17. The method of claim 11, further comprising:
probing the second pad with a plurality of probes including the second probe, wherein the second pad is grounded by the plurality of probes via a plurality of probing resistances corresponding to the plurality of probes.
18. The method of claim 11, wherein the comparator is an operational amplifier (OP-AMP).
19. The method of claim 11, wherein the step of measuring the voltage value from the second pad is performed by way of connecting a voltmeter to the third probe via a high-impedance input provided by the voltmeter.
20. The method of claim 11, wherein the step of tuning the digital to analog converter is performed by way of adjusting a digital code input of the digital to analog converter to vary the voltage value output to the first input of the comparator.

The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.

1. A method for storing data in a storage medium, comprising:
providing a layout of a magnetic tape storage medium including a first and second user data sections, wherein the first user data section has a shorter longitudinal length than the second user data section so that the first user data section comprises a faster access storage space than the second user data section;
determining a first set of data to be accessed with less delay than a second set of data;
writing the first set of data to the first user data section in a serpentine pattern; and
writing the second set of data to the second user data section in a serpentine pattern separate from the serpentine pattern of the first user data section.
2. The method of claim 1, wherein data is written to the second user data section after the first user data section is filled with data.
3. The method of claim 1, wherein the first and second user data sections are comprised of separate wrap sections on the tape.
4. The method of claim 1, wherein the magnetic tape medium is implemented using Linear Tape Open (LTO) technology.
5. The method of claim 1, wherein data is written in a serpentine pattern in n wrap sections between a beginning point and end point of the first user data section and in n wrap sections between a beginning point and end point of the second user data section, whereby there are a total of 2*n wrap sections in the first and second user data sections.
6. The method of claim 5, wherein writing the data to wrap sections between the beginning and end points of the first and second user data sections further comprises:
writing in the serpentine pattern data to a first through (n\u22121) wrap sections between the beginning and end points in the first user data section; and
writing in the serpentine pattern data to an n through (2*n\u22121) wrap sections between the beginning and end points in the second user data section.
7. The method of claim 6, further comprising:
writing data to wrap section 2*n from the end to the beginning points of the first user data section.
8. The method of claim 5, wherein writing the data to wrap sections between the beginning and end points of the first and second user data sections further comprises:
writing in the serpentine pattern data to a first through n wrap sections between the beginning and end points in the first user data section; and
writing in the serpentine pattern data to an (n+1) through (2*n) wrap sections between the beginning and end points in the second user data section.
9. The method of claim 1, wherein the first user data section is located closer to a beginning of the tape medium than the second user data section.
10. The method of claim 9, wherein data in a non-volatile memory in a cartridge including the magnetic tape medium indicates beginning and end longitudinal positions on the tape medium of the first and second user data sections.
11. The method of claim 1, wherein data within each user data section is stored in a consecutive wrap section, which comprises a section of the wrap extending the length of the tapes track groups, further comprising:
receiving a request to access a new position on the storage medium;
determining one wrap section in one of the first or second user data sections including the requested new position; and
accessing the requested new position in the determined wrap section in one of the first or second user data sections.
12. The method of claim 1, wherein there are additional user data sections in the storage medium.
13. A method for storing data files on a magnetic tape medium, comprising:
selecting a first set of data files to write to a first user data section of the magnetic tape medium, wherein the magnetic tape medium further includes a second user data section, and wherein the first user data section has a shorter longitudinal length than the second user data section so that the first user data section comprises a faster access user data section than the second user data section;
transferring the first set of data files to write to the magnetic tape medium wherein the first set of data files are written to the first user data section; and
transferring the second set of user data files to write to the magnetic tape medium after writing the first set of data files, wherein the second set of data files are written to the second user data section of the magnetic tape medium.
14. The method of claim 13, wherein before writing the second set of data files to the magnetic tape medium, filling the first user data section with data.
15. The method of claim 13, wherein data is written in separate serpentine patterns within the first and second user data sections.
16. The method of claim 15, wherein the first user data section is located closer to a beginning of the tape medium than the second user data section.
17. A method for storing data files on a magnetic tape medium, comprising:
selecting a first set of data files to write to a first user data section of the magnetic tape medium, wherein the magnetic tape medium further includes a second user data section, and wherein the first user data section comprises a faster access user data section than the second user data section;
transferring the first set of data files to write to the magnetic tape medium wherein the first set of data files are written to the first user data section; and
transferring the second set of user data files to write to the magnetic tape medium after writing the first set of data files, wherein the second set of data files are written to the second user data section of the magnetic tape medium wherein the first set of data files comprises previews of a multimedia files and wherein the second set of data files comprises the full multimedia files for which previews are included in the first set of data files.
18. A tape cartridge including a magnetic tape medium, wherein the magnetic tape medium comprises:
a first user data section; and
a second user data section, wherein the first user data section has a shorter longitudinal length than the second user data section so that the first user data section comprises a faster access storage space than the second user data section, wherein a first set of data to be accessible with less access delay than a second set of data is written to the first user data section in a serpentine pattern and wherein the second set of data is written to the second user data section in a serpentine pattern separate from the serpentine pattern of the first user data section.
19. The tape cartridge of claim 18, wherein the first user data section is located closer to a beginning of the tape medium than the second user data section.
20. The tape cartridge of claim 18, wherein the magnetic tape medium is implemented using Linear Tape Open (LTO) technology.
21. The tape cartridge of claim 18, wherein there are additional user data sections in the storage medium.
22. A system for storing data, comprising:
a storage medium;
means for providing a layout of the storage medium including a first and second user data sections, wherein the first user data section comprises a faster access storage space than the second user data section;
means for determining a first set of data to be accessed with less access delay than a second set of data; and
means for writing the first set of data to the first user data section and for writing the second set of data to the second user data section.
23. The system of claim 22, wherein the means for writing writes data to the second user data section after the first user data section is filled with data.
24. The system of claim 22, wherein the storage medium comprises magnetic tape, and wherein the first and second user data sections are comprised of separate wrap sections on the tape.
25. The system of claim 22, wherein the storage medium comprises a magnetic tape medium, and wherein the first user data section has a shorter longitudinal length than the second user data section.
26. The system of claim 22, wherein the magnetic tape medium is implemented using Linear Tape Open (LTO) technology.
27. The system of claim 22, wherein the storage medium comprises magnetic tape and wherein data is written in separate serpentine patterns within the first and second user data sections.
28. The system of claim 27, wherein the means for writing the first and second sets of data further performs:
writing data in a serpentine pattern in n wrap sections between a beginning point and end point of the first user data section and in n wrap sections between a beginning point and end point of the second user data section, whereby there are a total of 2*n wrap sections in the first and second user data sections.
29. The system of claim 28, wherein the means for writing the first and second sets of data further performs:
writing in the serpentine pattern data to a first through (n\u22121) wrap sections between the beginning and end points in the first user data section; and
writing in the serpentine pattern data to an n through (2*n\u22121) wrap sections between the beginning and end points in the second user data section.
30. The system of claim 29, wherein the means for writing the first and second sets of data further performs:
writing data to wrap section 2*n from the end to the beginning points of the first user data section.
31. The system of claim 28, wherein the means for writing the first and second sets of data further performs:
writing in the serpentine pattern data to a first through n wrap sections between the beginning and end points in the first user data section; and
writing in the serpentine pattern data to an (n+1) through (2*n) wrap sections between the beginning and end points in the second user data section.
32. The system of claim 22, wherein the first user data section is located closer to a beginning of the tape medium than the second user data section.
33. The system of claim 22, wherein data in a non-volatile memory in a cartridge including the magnetic tape medium indicates beginning and end longitudinal positions on the tape medium of the first and second user data sections.
34. The system of claim 22, wherein the storage medium comprises a magnetic tape, wherein data within each user data section is stored in a consecutive wrap section, which comprises a section of the wrap extending the length of the tapes track groups, further comprising:
means for receiving a request to access a new position on the storage medium;
means for determining one wrap section in one of the first or second user data sections including the requested new position; and
means for accessing the requested new position in the determined wrap section in one of the first or second user data sections.
35. The system of claim 22, wherein there are additional user data sections in the storage medium.
36. A system for storing data files;
a magnetic tape medium;
means for selecting a first set of data files to write to a first user data section of the magnetic tape medium, wherein the magnetic tape medium further includes a second user data section, and wherein the first user data section comprises a faster access user data section than the second user data section;
means for transferring the first set of data files to write to the magnetic tape medium wherein the first set of data files are written to the first user data section and for transferring the second set of user data files to write to the magnetic tape medium after writing the first set of data files, wherein the second set of data files are written to the second user data section of the magnetic tape medium.
37. The system of claim 36, wherein before writing the second set of data files to the magnetic tape medium, filling the first user data section with data.
38. The system of claim 36, wherein the first user data section has a shorter longitudinal length than the second user data section.
39. The system of claim 36, wherein data is written in separate serpentine patterns within the first and second user data sections.
40. The system of claim 36, wherein the first user data section is located closer to a beginning of the tape medium than the second user data section.
41. The system of claim 36, wherein the first set of data files comprises previews of a multimedia files and wherein the second set of data files comprises the full multimedia files for which previews are included in the first set of data files.
42. An article of manufacture including code for storing data in a storage medium by:
providing a layout of a magnetic tape storage medium including a first and second user data sections, wherein the first user data section has a shorter longitudinal length than the second user data section so that the first user data section comprises a faster access storage space than the second user data section;
determining a first set of data to be accessed with less delay than a second set of data;
writing the first set of data to the first user data section in a serpentine pattern; and
writing the second set of data to the second user data section in a serpentine pattern separate from the serpentine pattern of the first user data section.
43. The article of manufacture of claim 42, wherein data is written to the second user data section after the first user data section is filled with data.
44. The article of manufacture of claim 42, wherein the first and second user data sections are comprised of separate wrap sections on the tape.
45. The article of manufacture of claim 42, wherein the magnetic tape medium is implemented using Linear Tape Open (LTO) technology.
46. The article of manufacture of claim 42, wherein data is written in a serpentine pattern in n wrap sections between a beginning point and end point of the first user data section and in n wrap sections between a beginning point and end point of the second user data section, whereby there are a total of 2*n wrap sections in the first and second user data sections.
47. The article of manufacture of claim 46, wherein writing the data to wrap sections between the beginning and end points of the first and second user data sections further comprises:
writing in the serpentine pattern data to a first through (n\u22121) wrap sections between the beginning and end points in the first user data section; and
writing in the serpentine pattern data to an n through (2*n\u22121) wrap sections between the beginning and end points in the second user data section.
48. The article of manufacture of claim 47, further comprising:
writing data to wrap section 2*n from the end to the beginning points of the first user data section.
49. The article of manufacture of claim 46, wherein writing the data to wrap sections between the beginning and end points of the first and second user data sections further comprises:
writing in the serpentine pattern data to a first through n wrap sections between the beginning and end points in the first user data section; and
writing in the serpentine pattern data to an (n+1) through (2*n) wrap sections between the beginning and end points in the second user data section.
50. The article of manufacture of claim 42, wherein the first user data section is located closer to a beginning of the tape medium than the second user data section.
51. The article of manufacture of claim 42, wherein data in a non-volatile memory in a cartridge including the magnetic tape medium indicates beginning and end longitudinal positions on the tape medium of the first and second user data sections.
52. The article of manufacture of claim 42, wherein data within each user data section is stored in a consecutive wrap section, which comprises a section of the wrap extending the length of the tapes track groups, further comprising:
receiving a request to access a new position on the storage medium;
determining one wrap section in one of the first or second user data sections including the requested new position; and
accessing the requested new position in the determined wrap section in one of the first or second user data sections.
53. The article of manufacture of claim 42, wherein there are additional user data sections in the storage medium.
54. An article of manufacture for storing data files on a magnetic tape medium by:
selecting a first set of data files to write to a first user data section of the magnetic tape medium, wherein the magnetic tape medium further includes a second user data section, and wherein the first user data section has a shorter longitudinal length than the second user data section so that the first user data section comprises a faster access user data section than the second user data section;
transferring the first set of data files to write to the magnetic tape medium wherein the first set of data files are written to the first user data section in a serpentine pattern; and
transferring the second set of user data files to write to the magnetic tape medium after writing the first set of data files, wherein the second set of data files are written to the second user data section of the magnetic tape medium in a serpentine pattern separate from the serpentine pattern of the first user data section.
55. The article of manufacture of claim 54, wherein before writing the second set of data files to the magnetic tape medium, filling the first user data section with data.
56. The article of manufacture of claim 54, wherein the first user data section is located closer to a beginning of the tape medium than the second user data section.
57. An article of manufacture for storing data files on a magnetic tape medium by:
selecting a first set of data files to write to a first user data section of the magnetic tape medium, wherein the magnetic tape medium further includes a second user data section, and wherein the first user data section comprises a faster access user data section than the second user data section;
transferring the first set of data files to write to the magnetic tape medium wherein the first set of data files are written to the first user data section; and
transferring the second set of user data files to write to the magnetic tape medium after writing the first set of data files, wherein the second set of data files are written to the second user data section of the magnetic tape medium wherein the first set of data files comprises previews of a multimedia files and wherein the second set of data files comprises the full multimedia files for which previews are included in the first set of data files.

1. A power signal detecting system comprising:
a power supply, for providing a power signal; and
a portable electronic device electrically connected to the power supply and used for receiving the power signal; the portable electronic device comprising:
a sensing element for passing through the power signal;
a detecting module electrically connected to the sensing element and used for detecting the power signal passing through the sensing element, wherein the detecting module is a charger IC; and
a power management module electrically connected to the detecting module, calculating watts of the power signal according to a voltage signal of the detecting module, and identifying a supplying watt of the power supply and performing a power management for the portable electronic device, wherein the power management module determines that if a value of the power signal is above a first predetermined value being set for the portable electronic device, gradually reducing the frequency of a CPU of the portable electronic device or gradually stopping charging of the portable electronic device, wherein the first predetermined value is a maximum watt allowed by the portable electronic device and the power supply.
2. The power signal detecting system as claimed in claim 1, wherein the power management module determines that if a value of the power signal is below a second predetermined value being set for the portable electronic device, increasing the frequency of the CPU of the portable electronic device, wherein the second predetermined value is a minimum consume watt of the portable electronic device.
3. A power signal detecting method for detecting a power signal output by a power supply, the power signal being provided to a portable electronic device, the power signal detecting method comprising:
inputting the power signal to pass the power signal through a sensing element; detecting the power signal passing through the sensing element by a detecting module, wherein the detecting module is a charger IC;
calculating watts of the power signal according to a voltage signal of the detecting module and identifying a supplying watt of the power supply; and
performing a power management for the portable electronic device, wherein the power management comprises:
determining whether a value of the power signal is above a first predetermined value for the portable electronic device;
if the value of the power signal is above the first predetermined value, gradually reducing the frequency of a CPU of the portable electronic device or gradually stopping charging of the portable electronic device, wherein the first predetermined value is a maximum watt allowed by the portable electronic device and the power supply.
4. The power signal detecting method as claimed in claim 3 further comprising:
determining whether the CPU of the portable electronic device is operating at a low frequency; and
if the CPU is not operating at the low frequency, then reducing the frequency of the CPU of the portable electronic device.
5. The power signal detecting method as claimed in claim 3 further comprising: stopping charging of the portable electronic device.
6. The power signal detecting method as claimed in claim 3, wherein the power management further comprises:
determining whether the value of the power signal is below a second predetermined value for the portable electronic device, wherein the second predetermined value is a minimum consume watt of the portable electronic device;
if the value of the power signal is not below the second predetermined value, maintaining the frequency of the CPU of the portable electronic device; and
if the value of the power signal is below the second predetermined value, increasing the frequency of the CPU of the portable electronic device.
7. The power signal detecting method as claimed in claim 6 further comprising:
determining whether the CPU of the portable electronic device is operating at a high frequency; and
if the CPU is not at the high frequency, then increasing the frequency of the CPU of the portable electronic device.
8. The power signal detecting method as claimed in claim 6 further comprising:
determining to provide the step of increasing the frequency of the CPU of the portable electronic device repeatedly.
9. The power signal detecting method as claimed in claim 6 further comprising: releasing the charging current.
10. The power signal detecting method as claimed in claim 6 further comprising: gradually increasing the frequency of the CPU.
11. The power signal detecting method as claimed in claim 6 further comprising: gradually releasing the charging current.
12. A portable electronic device electrically connectable to a power supply to receive a power signal, the portable electronic device capable of detecting the power signal, the portable electronic device comprising: a sensing element, wherein the power signal passes through the sensing element; a detecting module electrically connected to the sensing element and used for detecting the power signal passing through the sensing element, wherein the detecting module is a charger IC; and
a power management module electrically connected to the detecting module, calculating watts of the power signal according to a voltage signal of the detecting module, and identifying a supplying watt of the power supply and performing a power management for the portable electronic device, wherein the power management module determines that if a value of the power signal is above a first predetermined value being set for the portable electronic device, gradually reducing the frequency of a CPU of the portable electronic device or gradually stopping charging of the portable electronic device, wherein the first predetermined value is a maximum watt allowed by the portable electronic device and the power supply.
13. The portable electronic device as claimed in claim 12, wherein the power management module determines that if a value of the power signal is below a second predetermined value being set for the portable electronic device, increasing the frequency of the CPU of the portable electronic device, wherein the second predetermined value is a minimum consume watt of the portable electronic device.
14. The portable electronic device as claimed in claim 12, wherein the sensing element is a resistor.
15. The portable electronic device as claimed in claim 12, wherein the detecting module is a charger IC.
16. The portable electronic device as claimed in claim 12, wherein the power management module further comprises a timer.

The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.

1. A method comprising:
detecting a first change of a physical property of a signal;
starting a measurement of a duration of a first time interval that begins with the detection of the first change;
detecting a second change of the physical property;
stopping the measurement of the duration of the first time interval and starting a second measurement of a duration of a second time interval in response to the detection of the second change;
detecting a third change of the physical property, and stopping the second measurement in response to detecting the third change;
determining a relation of the durations of the first time interval and the second time interval from the first measurement and the second measurement; and
determining the received data value based on the determined relation of the durations of the first time interval and the second time interval.
2. The method according to claim 1, wherein the physical property a supply voltage or supply current, respectively.
3. The method according to claim 1, wherein the first, second, and third changes of the physical property comprise at least one of: a change of a voltage, a change of an electrical current, a change of an amplitude, a change of a frequency, a change of a phase, and a change of a polarisation.
4. The method according to claim 1, wherein the method further comprises a transmission of a response signal, comprising:
setting a duration of a third time interval subsequent to the second time interval based on the duration of at least one of the first time interval and the second time interval; and
transmitting the response signal during the third time interval.
5. The method according to claim 4, wherein transmitting the response signal comprises controlling, as a function of a response data value to be transmitted, at least one of a voltage, an electrical current, an amplitude, a frequency, a phase, and a polarization during at least a portion of the third time interval.
6. The method according to claim 4, wherein the response signal is formed by controlling an electrical current on a same electrical connection as a voltage to a first magnitude in case a first response value is to be transmitted during the third time interval, and by alternatively controlling the electrical current to a second magnitude in case a second response value is to be transmitted during the third time interval, wherein the voltage corresponds to the physical property of the signal that exhibit’s the first, second, and third changes.
7. The method according to claim 4, wherein the reception of a sequence of data values and the transmission of a sequence of response signals are performed in an alternating manner for the sequence of data values and the sequence of response signals.
8. The method according to claim 7, further comprising a pause interval between the transmission of one of response signals and the reception of a subsequent one of data values.
9. The method according to claim 1, further comprising:
assessing on the basis of at least one of the first measurement and the second measurement whether an observed pattern of changes of the physical property corresponds to a first data transmission protocol or a second data transmission protocol; and
performing the action of determining the data value only in case the observed pattern of changes of the physical property corresponds to the first data transmission protocol.
10. The method according to claim 9, further comprising:
switching an operating mode of a component performing the method to the first data transmission protocol or to the second data transmission protocol depending on whether the observed pattern of changes of the physical property corresponds to the first data transmission protocol or the second data transmission protocol, respectively.
11. The method according to claim 1, further comprising:
buffering data values that have been received to maintain a sequence of recently received data values;
comparing the sequence of recently received data values with at least one handshake pattern; and
switching an operating mode regarding a data transmission protocol of a component performing the method depending on whether the sequence of recently received data values is equal to one of the at least one handshake pattern.
12. The method according to claim 1, further comprising:
assessing whether a transmission channel on which the physical property is observed is requested by a different data transmission protocol; and
switching to an alternative transmission channel for conducting the data transmission if the transmission channel is requested by the different data transmission protocol.
13. The method according to claim 1, wherein the data transmission occurs via a bus topology having at least three components connected to it, wherein identifying an individual component uses at least one of
a unique electrical behavior of each individual component,
a unique Bus-ID set up individually for each individual component, and
a unique device number, combined with an arbitration scheme.
14. The method according to claim 1, further comprising:
receiving a polling request from a remote component;
determining whether data to be transmitted to the remote component is available; and
transmitting a positive response to the polling request to the remote component during a third time interval subsequent to the second time interval if data to be transmitted is available.
15. The method according to claim 14, wherein the data transmission occurs via a bus topology having at least three components connected to it, the method further comprising:
comparing an incoming data transmission from the remote component with a unique Bus-ID or a unique device number; and
if a portion of the incoming data transmission matches the unique Bus-ID or the unique device number, sending the data to be transmitted to the remote component in a plurality of subsequent data transmission cycles.
16. A method comprising:
performing, at a first component, at least three change events regarding a quantity on a physical connection to a remote component, wherein a forward data value to be transmitted from the first component to a second component is indicated by a relative timing of one of the change events among the at least three change events; and
responding, at the second component, by controlling another quantity of the physical connection depending on a backward data value to be transmitted from the second component to the first component subsequent to one of the change events of the at least three change events.
17. A data communication device comprising:
a terminal to connect the data communication device to a remote data communication device via a transmission channel;
a detector to detect changes of a physical property on the transmission channel;
a circuit to receive a change information from the detector enabling a determination of a relation of a duration of a first time interval and of a duration of a second time interval of a pulse width modulation cycle defined by at least three change events regarding the physical property, the circuit being further configured to determine a time interval relation information based on relative durations of the first time interval and the second time interval; and
a data value provider to provide a data value transmitted to the data communication device via the transmission channel based on the determined time interval relation information.
18. The data communication device according to claim 17, further comprising:
a controllable source configured to control another physical property on the transmission channel depending on a backward data value to be transmitted to the remote component during a third time interval subsequent to the second time interval.
19. The data communication device according to claim 18, wherein the controllable source is configured to control at least one of a magnitude, a frequency, a phase, and a polarization of the other physical property so that it has a specific value at a reading time instant during the third time interval, the specific value being indicative of the backward value to be transmitted.
20. The data communication device according to claim 18, wherein the controllable source is configured to cause, depending on the backward data value to be transmitted, a leading edge or a trailing edge with respect to the other physical property during the third time interval.
21. The data communication device according to claim 17, wherein the terminal is a supply terminal of the data communication device or of a device comprising the data communication device, wherein the physical property is a supply voltage or a supply current and the data communication to the data communication device is performed by modulating the supply voltage or the supply current to cause the changes of the physical property.
22. The data communication device according to claim 21, wherein the data communication device is configured to influence a magnitude of the electrical supply current on the electrical connection to perform a data communication from the data communication device to a remote data communication device.
23. The data communication device according to claim 17, wherein the physical property can change between at least two levels.
24. The data communication device according to claim 17, further comprising an identification unit configured to store an identifier for the data communication device that may be used when the data communication device is used in a bus configuration, wherein the identification unit is further configured to compare an incoming sequence of data values with the identifier and to cause a change of an operating mode of the data communication device if the incoming sequence matches the identifier.
25. The data communication device according to claim 17, further comprising:
a second terminal to connect the data communication device to the remote data communication device via another transmission channel;
a switching element connected to the second terminal and configured to modulate the physical property or another physical property on the transmission channel; and
a multiplexer configured to multiplex the terminal and the second terminal for being connected to the detector based on a multiplexer control signal that controls whether the data communication is to occur via the transmission channel or the other transmission channel.