Author: claimsbot

1. A system comprising:
a transmitter having transmit pre-emphasis circuitry with a plurality of transmit filter taps;
a receiver to receive a signal from the transmitter via a channel, the channel having a channel length, the receiver having a decision-feedback equalizer having at least one filter tap, the receiver further comprising a linear equalizer coupled between the channel and the decision-feedback equalizer and having at least one linear equalizer tap, the plurality of transmit filter taps further including an adjustable filter tap of an adjustable symbol latency, the adjustable filter tap having a pre-cursor latency in a first equalization mode and a post-cursor latency in a second equalization mode, the system further comprising tap control logic coupled to the at least one linear equalizer tap and the adjustable filter tap of the transmit pre-emphasis circuitry; and
where the system supports a training mode for link training operations and at least the first and second equalization modes for data transfer operations, including the first equalization mode where the transmit pre-emphasis circuitry and the decision-feedback equalizer are activated, and the second equalization mode where the transmit pre-emphasis circuitry is activated and the decision-feedback equalizer is deactivated, and where a selection between the first equalization mode and the second equalization mode is based on the channel length.
2. The system of claim 1, wherein the linear equalizer is disabled in the second equalization mode and enabled in the first equalization mode.
3. The system of claim 1, wherein the tap control logic is further coupled to the linear equalizer to selectively disable the linear equalizer.
4. The system of claim 1, wherein the transmit pre-emphasis circuitry further includes logic to set the adjustable filter tap to a first symbol latency relative to a main filter tap in the first equalization mode and to set the adjustable filter tap to a second symbol latency relative to the main filter tap in the second equalization mode.
5. The system of claim 1, the transmit pre-emphasis circuitry including a driver having a plurality of driver input terminals, the plurality of transmit filter taps coupled to respective ones of the driver input terminals and supporting first and second tap configurations, and mode circuitry to select the first tap configuration in the second equalization mode and the second tap configuration in the first equalization mode.
6. A system comprising:
first and second transmitters, each transmitter having a plurality of transmit taps, including a pre-cursor transmit tap, a cursor transmit tap, and a post-cursor transmit tap, coupled to respective driver input terminals;
first and second channels coupled to the respective first and second transmitters;
first and second receivers coupled to the first and second transmitters via the respective first and second channels, the first and second receivers each having a plurality of receive taps, including a post-cursor receive tap; and
tap-control logic coupled to the receive taps, the tap-control logic disabling at least one of the receive taps in the first receiver and enabling at least one of the receive taps in the second receiver;
wherein the tap-control logic is coupled to the transmit taps;
wherein the tap-control logic supports multiple power modes, including a low-power mode in which a first number of the receive taps is enabled and a high-power mode in which a second number, greater than the first number, of the receive taps is enabled; and
wherein the first channel is in the low-power mode and the second channel is in the high-power mode.
7. The system of claim 6, wherein each of the first and second receivers includes a linear equalizer preceding the receive taps.
8. The system of claim 6, wherein each of the receivers includes an amplitude detector.
9. A signaling system supporting a plurality of modes, including a first mode and a second mode, the signaling system comprising:
a. a communication channel;
b. a transmitter that includes:
a plurality of pre-emphasis taps, including a first transmit tap and a second transmit tap of an adjustable latency relative to the first transmit tap, and
logic to alter the latency of the second transmit tap relative to the first transmit tap to select between the first mode and the second mode; and

c. a receiver having a receive equalizer coupled to the transmitter via the communication channel, wherein the receive equalizer includes at least one post-cursor receive tap having a post-cursor latency in the first mode and disabled in the second mode, and wherein the second transmit tap has the post-cursor latency in the second mode.
10. The signaling system of claim 9, wherein the receiver includes a liner equalizer with adjustable gain disposed between the receive equalizer and the channel.
11. A signaling system supporting a plurality of power and performance modes, including a high-performance mode and a low-performance mode, the signaling system comprising:
a. a communication channel;
b. a first transmitter that includes:
i. a transmit pre-emphasizer having a plurality of input terminals and an output port coupled to the communication channel;
ii. a plurality of pre-emphasis taps coupled to respective ones of the plurality of input terminals, the pre-emphasis taps including a pre-cursor tap and a transmit post-cursor tap; and
iii. a first mode-select port;

c. a receiver coupled to the output port of the transmitter via the communication channel, the receiver including a decision-feedback equalizer having at least one filter tap, and a linear equalizer coupled between the communication channel and the decision-feedback equalizer and having at least one linear equalizer tap, the receiver further including a second mode-select port; and
d. a controller coupled to the first and second mode-select ports;
e. wherein the controller disables the transmit post-cursor tap and enables the receive post-cursor tap in the high-performance mode.
12. The signaling system of claim 11, further comprising:
a. a second communication channel;
b. a second transmitter that includes:
i. a second transmit pre-emphasizer having a plurality of input terminals and an output port coupled to the communication channel;
ii. a second plurality of pre-emphasis taps coupled to respective ones of the plurality of input terminals, the second plurality of pre-emphasis taps including a first transmit tap and a second transmit tap of an adjustable latency relative to the first transmit tap; and
iii. a second mode-select port to receive a second mode-select signal, the second mode-select signal to alter the latency of the second transmit tap relative to the first transmit tap.
13. The signaling system of claim 12, wherein the controller is to control the second transmit tap in at least one of the first and second transmitters to alternatively precede or follow the first transmit tap in the respective one of the first and second transmitters.
14. The signaling system of claim 13, wherein the controller independently selects between the high-performance mode and the low-performance modes for each of the first and second transmitters.
15. The signaling system of claim 14, further comprising at least one performance monitor coupled to an output of the receiver, the performance monitor to convey to the controller an error rate for the communication channel.
16. The signaling system of claim 15, wherein the controller selects between the high-performance mode or the low-performance mode for the communication channel based, at least in part, upon the error rate.
17. The signaling system of claim 16, wherein the controller selects, for the communication channel, the high-performance mode if the error rate is above an error threshold.
18. The signaling system of claim 17, wherein the controller selects, for the second communication channel, the high-performance mode if a second error rate is above the error threshold.
19. A system comprising:
a. a transmitter having transmit pre-emphasis circuitry with a plurality of transmit filter taps;
b. a channel coupled to the transmit pre-emphasis circuitry; and
c. a receiver coupled to the transmit pre-emphasis circuitry via the channel, the receiver having a decision-feedback equalizer having one or more filter taps, the receiver further comprising a linear equalizer coupled between the channel and the decision-feedback equalizer and having at least one linear-equalizer tap, the plurality of transmit filter taps further including an adjustable filter tap of an adjustable symbol latency, the adjustable filter tap having a pre-cursor latency in a first equalization mode and a post-cursor latency in a second equalization mode, the system further comprising tap control logic coupled to the at least one tap of the linear equalizer and the adjustable filter tap of the transmit pre-emphasis circuitry;
where the system supports at least the first and second equalization modes, where the first equalization mode comprises a high-performance mode where the decision-feedback equalizer is operated, and where the second equalization mode comprises a low-power mode where the transmit pre-emphasis circuitry is activated and the decision-feedback equalizer is deactivated; and
wherein the transmit pre-emphasis circuitry is activated in each of the high-performance mode and the low-power mode.
20. The system of claim 19, where the receiver includes the decision-feedback equalizer with plural taps, at least one of the plural taps activated and de-activated in the high-performance mode and low-power mode respectively.
21. The system of claim 20, where at least one of the plural taps is activated in each of the high-performance mode and the low-power mode.

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. An optical storage apparatus comprising:
an optical head for irradiating light onto an optical information recording medium in which a magneto-optical recording film is formed on a substrate on which phase pits are formed, detecting the light intensity of light modulated by said phase pits from return light from said optical information recording medium as ROM signals, and detecting the differential amplitude of components in a polarization direction when said return light is modulated by said magneto-optical recording film as RAM signals;
a magnetic field application unit for applying a magnetic field to the information recording medium for recording the information to said magneto-optical recording film;
a track actuator for accessing at least said optical head at a desired position of said optical information recording medium;
a buffer memory for reading to store at least said detected ROM signals;
a buffer memory for writing to store input signals to be written to said magneto-optical recording film; and
a controller for reading at least said ROM signals at n (n>2) times of information regeneration velocity V, which is a reference, storing said ROM signals in said buffer memory for reading, then outputting said stored information at the velocity of said information regeneration velocity V,
wherein said controller stores said input information to said buffer memory for writing, then accessing said optical head at an address position that is managed so that the time relationship of said output information and said input information link and records the information from said buffer memory for writing at said n times of velocity as RAM signals, while said stored information is being output from said buffer memory for reading.
2. The optical storage apparatus according to claim 1, wherein said buffer memory for reading further comprises:
a buffer memory for reading ROM signals that stores said ROM signals; and
a buffer memory for reading RAM signals that stores said RAM signals,
wherein further comprises a computing unit for computing information from both of said buffer memories for reading.
3. The optical storage apparatus according to claim 1, wherein at least one of said buffer memory for reading ROM signals and buffer memory for writing RAM signals further comprises two internal buffer memories and a switch,
and wherein said controller switches said switch when the storage volume in one internal buffer memory reaches a reference volume, and stores the information to the other internal buffer memory.
4. The optical storage apparatus according to claim 1, wherein said magnetic field application unit further comprises a magnetic head that moves along with said optical head, and applies a modulated magnetic field at a position in which said optical head condenses light, so as to execute overwrite recording.
5. The optical storage apparatus according to claim 1, wherein said information is read and said information is recorded at n\u22674.
6. The optical storage apparatus according to claim 1, wherein said controller modulates the irradiation power of said optical head to execute overwrite recording.
7. The optical storage apparatus according to claim 1, wherein said controller controls the read and write of said magneto-optical recording film using a RAM format of said magneto-optical recording film that is the same as a ROM format by said phase pits of said optical information recording medium.
8. A read and write method for an optical storage medium, comprising:
a step of irradiating light onto an optical information recording medium in which a magneto-optical recording film is formed on a substrate on which phase pits are formed, detecting the light intensity of light modulated by said phase pits from return light from said optical information recording medium as ROM signals, and detecting the differential amplitude of components in a polarization direction when said return light is modulated by said magneto-optical recording film as RAM signals;
a step of reading at least said ROM signals at n (n>2) times of information regeneration velocity V, which is a reference, storing said ROM signals in a buffer memory for reading, and then outputting said stored information at the velocity of said information regeneration velocity V; and
a step of accessing an optical head at an address position that is managed so that the time relationship of said output information and said input information link, after said input information is stored in the buffer memory for writing, and recording the information from said buffer memory for writing at said n times of velocity as RAM signals, while said stored information is being output from said buffer memory for reading.
9. The read and write method for an optical storage medium according to claim 8, wherein said reading step further comprises:
a step of storing the ROM signals of said optical information recording medium to a buffer memory for reading ROM signals; and
a step of storing said RAM signals of the optical information recording medium to a buffer memory for reading RAM signals;
and wherein said output step further comprises a step of computing information from both said buffer memories for reading.
10. The read and write method for an optical storage medium according to claim 8, wherein said storage step further comprises a step of switching a switch and storing the information to the other internal buffer memory, when, in at least one of buffer memory for reading ROM signals and buffer memory for writing RAM signals comprised of two internal buffer memories and a switch respectively, a storage volume of one internal buffer memory reaches a reference volume.
11. The read and write method for an optical storage medium according to claim 8, wherein said recording step further comprises a step in which a magnetic head that moves along with said optical head applies a modulated magnetic field at a position in which said optical head condenses light, so as to execute overwrite recording.
12. The read and write method for an optical storage medium according to claim 8, wherein said information is read and said information is recorded at n\u22674.
13. The read and write method for an optical storage medium according to claim 8, wherein said recording step further comprises a step of modulating the irradiation power of said optical head to execute overwrite recording.
14. The read and write method for an optical storage medium according to claim 8, wherein the read and write of said magneto-optical recording film are controlled using a RAM format of said magneto-optical recording film that is the same as a ROM format by said phase pits of said optical information recording medium.

1. A bus controller for controlling a bus communication system wherein each initiator of a plurality of initiators connected to a bus generates and sends a request signal to request use of the bus at predetermined intervals, and upon being granted use of the bus in response to the request signal, sends a command signal to instruct execution of a predetermined process to a target connected to the bus, and when the each initiator determines that the predetermined process is not to be executed by the target, the each initiator sends, upon being granted use of the bus again, the command signal to the target, the bus controller comprising:
a bus control unit configured to, upon receiving the request signal from the each initiator, grant use of the bus to the each initiator based on predetermined priorities; and
a mask generating unit configured to mask the request signal generated by the each initiator to control a timing, at which the request signal is sent from the each initiator, to be aperiodic,
wherein the mask generating unit includes
a mask interval setting unit configured to set, as a mask interval, an interval for masking the request signal generated by the each initiator;
a mask condition setting unit configured to set, as a plurality of mask conditions, a plurality of combinations of initiators to be subject to masking, the plurality of mask conditions including as many excluding mask conditions as the plurality of initiators, each of the excluding mask conditions corresponding to each of the plurality of initiators and being a combination of initiators to be subject to masking from which only the each of the plurality of initiators corresponding to the each of the excluding mask conditions is excluded among the plurality of initiators; and
a counter of an initiator mask ID (identifier) corresponding to each of the plurality of mask conditions set by the mask condition setting unit, and
wherein the mask generating unit, at each mask interval set by the mask interval setting unit, counts up the counter, determines a selected initiator to be subject to masking among the plurality of initiators, the selected initiator having the initiator mask ID indicated by the counter, and masks a request signal generated by the selected initiator.
2. The bus controller of claim 1,
wherein the mask interval setting unit sets, as the mask interval, an interval different from an interval at which the each initiator generates and sends the request signal.
3. The bus controller of claim 2,
wherein the mask generating unit masks the request signal generated by the selected initiator for a period longer than an interval at which the selected initiator generates and sends the request signal.
4. The bus controller of claim 1,
wherein the plurality of mask conditions further includes a mask condition that is a combination of initiators to be subject to masking in which all of the plurality of initiators are included.
5. The bus controller of claim 1,
wherein the mask condition setting unit sets the plurality of mask conditions for each type of the command signal.
6. The bus controller of claim 1,
wherein the mask generating unit further includes a mask period setting unit configured to set, as a mask period, a period of time to perform masking during each mask interval set by the mask interval setting unit.
7. The bus controller of claim 1,
wherein the mask generating unit further includes a subject-of-masking indication flag setting unit configured to set whether or not the each initiator is subject to masking.
8. A bus communication system comprising a plurality of initiators and at least one target both connected to a bus,
wherein each initiator generates and sends a request signal to request use of the bus at predetermined intervals, and upon being granted use of the bus in response to the request signal, sends a command signal to instruct execution of a predetermined process to a target, and when the each initiator determines that the predetermined process is not to be executed by the target, the each initiator sends, upon being granted use of the bus again, the command signal to the target,
the bus communication system further comprising a bus controller connected to the bus, the bus controller including a bus control unit configured to, upon receiving the request signal from the each initiator, grant use of the bus to the each initiator based on predetermined priorities, and a mask generating unit configured to mask the request signal generated by the each initiator to control a timing, at which the request signal is sent from the each initiator, to be aperiodic,
wherein the mask generating unit includes
a mask interval setting unit configured to set, as a mask interval, an interval for masking the request signal generated by the each initiator;
a mask condition setting unit configured to set, as a plurality of mask conditions, a plurality of combinations of initiators to be subject to masking, the plurality of mask conditions including as many excluding mask conditions as the plurality of initiators, each of the excluding mask conditions corresponding to each of the plurality of initiators and being a combination of initiators to be subject to masking from which only the each of the plurality of initiators corresponding to the each of the excluding mask conditions is excluded among the plurality of initiators; and
a counter of an initiator mask ID (identifier) corresponding to each of the plurality of mask conditions set by the mask condition setting unit, and
wherein the mask generating unit, at each mask interval set by the mask interval setting unit, counts up the counter, determines a selected initiator to be subject to masking among the plurality of initiators, the selected initiator having the initiator mask ID indicated by the counter, and masks a request signal generated by the selected initiator.
9. A bus control method for controlling a bus communication system wherein each initiator of a plurality of initiators connected to a bus generates and sends a request signal to request use of the bus at predetermined intervals, and upon being granted use of the bus in response to the request signal, sends a command signal to instruct execution of a predetermined process to a target connected to the bus, and when the each initiator determines that the predetermined process is not to be executed by the target, the each initiator sends, upon being granted use of the bus again, the command signal to the target, the bus control method comprising:
granting use of the bus to the each initiator based on predetermined priorities upon receiving the request signal from the each initiator; and
masking the request signal generated by the each initiator to control a timing, at which the request signal is sent from the each initiator, to be aperiodic,
wherein the masking includes
setting, as a mask interval, an interval for masking the request signal generated by the each initiator;
setting, as a plurality of mask conditions, a plurality of combinations of initiators to be subject to masking, the plurality of mask conditions including as many excluding mask conditions as the plurality of initiators, each of the excluding mask conditions corresponding to each of the plurality of initiators and being a combination of initiators to be subject to masking from which only the each of the plurality of initiators corresponding to the each of the excluding mask conditions is excluded among the plurality of initiators; and
at each of the mask interval, counting up a counter of an initiator mask ID (identifier) corresponding to each of the plurality of mask conditions, determining a selected initiator to be subject to masking among the plurality of initiators, the selected initiator having the initiator mask ID indicated by the counter, and masking a request signal generated by the selected initiator.

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) Machine for fitting and removing vehicle wheels, comprising a base frame, a clamping and rotating device for clamping and rotating the rim of a vehicle wheel around a substantially horizontal rotation axis, which are fitted on said base frame by interposing first guide means substantially straight along a substantially vertical sliding direction, at least one operating arm which is associable with said base frame along an oblique direction with respect to the position plane of said rotation axis and of said sliding direction and which has at least one work tool for fitting and removing a tyre onto and from said rim, said operating arm being positionable in an operating configuration in which it is arranged substantially at right angles and incidental to said rotation axis and said work tool is positioned near the circumferential edge of said rim, wherein the machine comprises a transformation device for transforming the sliding movement of said clamping and rotating device into a movement of variation of the inclination of said operating arm in which the arm itself is kept continuatively in said operating configuration as the position of said clamping and rotating device changes along such sliding direction.
2) Machine according to claim 1, wherein said transformation device comprise at least one supporting structure of said operating arm which is associated with said base frame by interposition of means of rotation around a swinging axis substantially parallel to said rotation axis.
3) Machine according to claim 2, wherein said supporting structure comprises at least one substantially plate-shaped and vertical bracket hinged to said base frame around said swinging axis.
4) Machine according to claim 3, wherein said bracket is arranged facing and adjacent to at least one surface of said base frame.
5) Machine according to claim 4, wherein at least one between said bracket and said surface has an opening shaped according to a circumference arc with its centre at the hinging point between said base frame and said bracket, and engaged by a hinge associable with the other between said bracket and said surface.
6) Machine according to claim 5, wherein said opening is a through opening obtained on said base frame.
7) Machine according to claim 3, wherein said transformation device comprise at least one plate associable integral with said clamping and rotating device and arranged substantially facing and adjacent to said bracket.
8) Machine according to claim 7, wherein said transformation device comprise at least one elongated first slot obtained on at least one between said bracket and said plate and engaged by a first pin associable with the other between said bracket and said plate, the path defined by said first slot being suitable for determining the swinging movement of said bracket and the change in the inclination of said operating arm.
9) Machine according to claim 8, wherein said first slot is a through slot obtained on said plate.
10) Machine according to claim 7, wherein said transformation device comprise at least an elongated second slot substantially parallel with said sliding direction, obtained on at least one between said bracket and said plate and engaged by a second pin associable with the other between said bracket and said plate.
11) Machine according to claim 10, wherein said second slot is a through slot obtained on said plate.
12) Machine according to claim 10, wherein said second pin coincides with said swinging axis.
13) Machine according to claim 1, wherein said first guide means comprise at least one first slide supporting said clamping and rotating device which is associated sliding along a substantially vertical upright of said base frame.
14) Machine according to claim 13, wherein said first guide means comprise a first linear actuator to drive the sliding of said first slide that has the opposite ends associated with said base frame and with said first slide respectively.
15) Machine according to claim 2, wherein said operating arm is fitted on said supporting structure by interposition of substantially straight second guide means defined along a direction substantially parallel to said rotation axis.
16) Machine according to claim 15, wherein said second guide means comprise at least a second slide supporting said operating arm which is engaged sliding along a bar substantially parallel to said rotation axis which is associated with one substantially plate-shaped and vertical bracket hinged to said base frame around said swinging axis.
17) Machine according to claim 16, wherein said second guide means comprise at least a second linear actuator to drive the sliding of said second slide that has the opposite ends associated with said bracket and with said second slide respectively.
18) Machine according to claim 1, comprising at least two of said operating arms to work opposite sides of said wheel.
19) Machine according to claim 1, wherein said work tool is a bead breaking disc.
20) Machine according to claim 1, comprising at least one operating head associable with said base frame and having an extractor tool for fitting and removing said tyre onto and from said rim.
21) Machine according to claim 20, wherein said operating head is arranged substantially coplanar with the position plane of said rotation axis and of said sliding direction.