1. An apparatus comprising:
a first electronic device to communicate with a second electronic device, the first device having:
a first wireless network transceiver, and
a first RFID transceiver communicatively coupled with the first wireless transceiver to communicate with a second RFID transceiver in the second device to initiate communication between the first wireless transceiver and a second wireless transceiver that is part of the second device.
2. The apparatus of claim 1, wherein the first and second wireless network transceivers are to operate according to a wireless communication protocol.
3. The apparatus of claim 1, wherein the second wireless transceiver is to cause the second wireless communications transceiver to transition to a low-power state.
4. The apparatus of claim 1, wherein the second wireless transceiver is to cause the second wireless communications transceiver to power up and communicate with the first wireless communications transceiver.
5. The apparatus of claim 1, wherein the second RFID transceiver includes a power scavenging receiver.
6. The apparatus of claim 1 further comprising: a memory coupled with the power-scavenging receiver; and a power-scavenging transmitter coupled with the memory to transmit a value received from the memory in response to a signal received by the power-scavenging receiver.
7. An apparatus comprising:
a first electronic device to communicate with a second electronic device, the first device having:
a first wireless network transceiver, and
a first MD transceiver to communicate with a second RFID transceiver in the second device to initiate communication between the first wireless transceiver and a second wireless transceiver that is part of the second device.
8. The apparatus of claim 7, in which the first and second wireless transceivers operate in accordance with an IEEE 802.11 protocol, whereby RFID communication between the first and second devices is handed over to WiFi communication between the first and second devices.
9. The apparatus of claim 7, in which the first device is a mobile handset.
10. The apparatus of claim 7, in which the first and second devices are enabled for bi-directional communications to allow the mobile handset to be authenticated before attempting to engage in communications with the second device.
11. The apparatus of claim 7, in which the first and second RFID transceivers convey power state information for one of the first and second wireless transceivers for at least one of the first and second devices.
12. An electronic device, comprising:
an RFID entity to communicate with an RFID entity in a second electronic device; and
a WiFi transceiver, wherein the RFID entities in the first and second devices are to initiate communication between the WiFi transceiver in the first device and a WiFi transceiver in the second device.
13. The electronic device of claim 12, in which the RFID entities communicate using high frequency inductive coupling.
14. The electronic device of claim 13, in which the RFID entities are to operate in accordance with an ISOIEC 18000 specification.
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:
generating a pulse with an initial pulse width;
sampling the pulse with a reference signal in an initial measurement to obtain a measured delay;
conditionally adjusting the initial pulse width; and
delaying the reference signal based on the measured delay to generate an internal signal.
2. The method of claim 1, wherein generating the pulse includes:
delaying the reference signal to generate a first feedback signal and a second feedback signal, the first and second feedback signals having different timing relationships with each other;
generating a first edge of the pulse using the first feedback signal; and
generating a second edge of the pulse using the second feedback signal.
3. The method of claim 1, wherein conditionally adjusting the initial pulse width includes:
generating a second pulse with a pulse width greater than the initial pulse width if the measured delay is not obtained in the initial measurement; and
sampling the second pulse with the reference signal in a second measurement to obtain the measured delay if the measured delay is not obtained in the initial measurement.
4. The method of claim 1, wherein conditionally adjusting the initial pulse width includes increasing the initial pulse width.
5. The method of claim 1, wherein conditionally adjusting the initial pulse width includes decreasing the initial pulse width.
6. The method of claim 1, wherein generating the pulse includes:
delaying a version of the reference signal using a first delay chain to provide a first feedback signal and using a second delay chain to provide a second feedback signal; and
generating edges of the pulse based on the first and second feedback signals.
7. The method of claim 6, wherein generating the edges of the pulse includes generating a rising edge of the pulse based on a rising edge of the first feedback signal, and generating a falling edge of the pulse based on a rising edge of the second feedback signal.
8. A method comprising:
receiving a reference signal;
using the reference signal to sample a pulse on a measuring path to obtain a measured delay;
delaying the reference signal on a forward path based on the measured delay to generate an internal signal;
generating the pulse based on a delay of the reference signal on a feedback path; and
conditionally adjusting a pulse width of the pulse for adjusting the measured delay.
9. The method of claim 8, wherein delaying the reference signal includes applying a main delay to the reference signal, and wherein the main delay and the measured delay are provided by an equal number of delay elements of the measuring path and the forward path.
10. The method of claim 8, wherein generating the pulse includes:
propagating the reference signal on a first delay segment of the feedback path to generate a first feedback signal;
propagating the reference signal on a second delay segment of the feedback path to generate a second feedback signal; and
generating edges of the pulse based on timing of the first and second feedback signals.
11. The method of claim 10, wherein the first delay segment is a fixed delay segment, and wherein the second delay segment is an adjustable delay segment.
12. The method of claim 10, wherein generating the edges of the pulse includes:
generating a first edge of the pulse based on the first feedback signal; and
generating a second edge of the pulse based on the second feedback signal.
13. The method of claim 11, wherein conditionally adjusting the pulse width includes adjusting a delay of the second delay segment to increase the pulse width.
14. The method of claim 12, wherein conditionally adjusting the pulse width includes adjusting a delay of the second delay segment to decrease the pulse width.
15. A method comprising:
receiving a reference signal;
generating a plurality of feedback signals based on the reference signal;
generating a pulse based on the feedback signals;
propagating the pulse on a measuring path during a measurement to obtain a measured delay;
applying a main delay to the reference signal on a forward path to generate an internal signal;
monitoring the measurement; and
adjusting a pulse width of the pulse based on the monitoring to adjust the timing relationship between the internal signal and the reference signal.
16. The method of claim 15, wherein the main delay is equal to the measured delay.
17. The method of claim 15, wherein generating the plurality of feedback signals includes:
propagating the reference signal on a first delay segment to generate a first feedback signal; and
propagating the reference signal on a second delay segment to generate a second feedback signal.
18. The method of claim 17, wherein generating the pulse includes:
generating a first edge of the pulse based on an edge of the first feedback signal; and
generating a second edge of the pulse based on an edge of the second feedback signal.
19. The method of claim 18, wherein the first delay segment is a fixed delay segment, and wherein the second delay segment is an adjustable delay segment.
20. The method of claim 19, wherein adjusting the pulse width includes increasing a delay of the second delay segment.
21. The method of claim 19, wherein adjusting the pulse includes decreasing a delay of the second delay segment.
22. The method of claim 15, wherein monitoring includes resetting the measuring path after each time the pulse width is adjusted.
23. The method of claim 22, wherein monitoring includes activating a signal to indicate a completion of a propagation of the pulse through the measuring path.
24. A method comprising:
receiving a reference signal at a memory device;
generating a pulse based on a delay of the reference signal on a feedback path;
propagating the pulse on a measuring path during a measurement to obtain a measured delay;
delaying the reference signal on a forward path based on the measured delay to generate an internal signal;
conditionally adjusting a pulse width of the pulse to synchronize the internal signal with the reference signal; and
transferring data on a data output path of the memory device based on timing of the internal signal.
25. The method of claim 24, wherein generating the pulse includes:
propagating the reference signal on a first delay segment of the feedback to generate a first feedback signal;
propagating the reference signal on a second delay segment to generate a second feedback signal; and
generating edges of the pulse based on timing of the first and second feedback signals.
26. The method of claim 25, wherein generating the pulse includes:
generating a rising edge of the pulse based on a rising edge of the first feedback signal; and
generating a falling edge of the pulse based on a rising edge of the second feedback signal.
27. The method of claim 25, wherein the first delay segment is a fixed delay segment, and wherein the second delay segment is an adjustable delay segment.
28. The method of claim 27, wherein adjusting the pulse width includes increasing a delay of the second delay segment.
29. The method of claim 27, wherein adjusting the pulse width includes decreasing a delay of the second delay segment.
30. The method of claim 27, wherein measuring path is reset after each time the pulse width is adjusted.