Electronic device, integrated circuit and method therefor
View Patent ↗A wireless communication device comprises a number of sub-systems and clock generation logic arranged to generate at least one clock signal to be applied to the number of sub-systems. One of the number of sub-systems comprises sampling logic for receiving input data and performing initial sampling on an input data bit using multiple separated phases of a clock period of the at least one clock signal applied to the sampling logic thereby producing multiple phase separated sampled outputs of the input data bit. The sampling logic is configured to perform a number of re-sampling operations on the multiple phase separated sampled outputs at a number of intermediate phases thereby producing multiple phase separated intermediate sampled outputs prior to performing a final sample of the multiple phase separated intermediate sampled outputs at a single phase of the at least one clock signal to produce a sampled input data signal.
1. An electronic device comprises:
a number of sub-systems and clock generation logic arranged to generate at least one clock signal to be applied to the number of sub-systems, wherein one of the number of sub-systems comprises sampling logic for receiving input data and performing initial sampling on an input data bit using multiple separated phases of a clock period of the at least one clock signal applied to the sampling logic thereby producing multiple phase separated sampled outputs of the input data bit;
wherein the sampling logic comprises a plurality of data paths, each of the plurality of data paths to perform a resampling operation on a corresponding one of the multiple phase separated sampled outputs to produce a corresponding intermediate sampled outputs prior to performing a final sample of the corresponding intermediate sampled output at a single phase of the at least one clock signal to produce a corresponding sampled input data signal; and
a cross-correlator to select a clock phase based on sampled input data signals provided by the plurality of data paths and to disable a subset of the plurality of data paths based on the selected clock phase.
2. An integrated circuit comprising:
at least one of a number of sub-systems and arranged to comprise or be operably coupled to clock generation logic arranged to generate at least one clock signal, wherein the integrated circuit comprises sampling logic for receiving input data and performing initial sampling on an input data bit using multiple separated phases of the at least one clock signal applied to the sampling logic thereby producing multiple phase separated sampled outputs of the input data bit;
wherein the sampling logic comprises a plurality of data paths, each of the plurality of data paths to perform a resampling operation on a corresponding one of the multiple phase separated sampled outputs to produce a corresponding intermediate sampled output prior to performing a final sample of the corresponding intermediate sampled output at a single phase of the at least one clock signal to produce a corresponding sampled input data signal; and
a cross-correlator to select a clock phase based on sampled input data signals provided by the plurality of data paths and to disable a subset of the plurality of data paths based on the selected clock phase.
3. The integrated circuit of claim 2 wherein the integrated circuit is a radio frequency integrated circuit or a baseband integrated circuit.
4. The integrated circuit of claim 2 wherein the cross-correlator comprises programmable logic, and the cross-correlator is arranged to select a the clock phase to be used by the sampling logic in sampling the input data, such that the programmable logic is arranged to program a final sample at a single phase of the at least one clock signal.
5. The integrated circuit of claim 4 wherein the programmable logic is arranged to program the final sample at a single phase of the at least one clock signal so that a maximum time is allowed between the initial phase and intermediate phase and/or the intermediate phase and final sampling phase.
6. The integrated circuit of claim 2 wherein the input data is received using one of a plurality of data rates and the sampling logic is arranged to sample input data at either the initial sampling and/or intermediate sampling at multiple sampling phases.
7. The integrated circuit of claim 6 wherein the multiple sampling phases are selected dependent upon one or more of the following:
(i) The input data rate;
(ii) A performance of the at least one clock signal; and
(iii) A performance of the input data signal.
8. The integrated circuit of claim 7 wherein:
(i) The performance of the at least one clock signal is clock jitter; and
(ii) The performance of the input data signal is data jitter.
9. The integrated circuit of claim 6 wherein the subset of data paths comprises a first set when the input data rate is at a first data rate of the number of data rates and comprises a second set when the input data rate is at a second data rate.
10. The integrated circuit of claim 2 wherein the subset of data paths are disabled for a duration of a current frame or until a subsequent frame is received.
11. The integrated circuit of claim 2 further comprising a clock control module operably coupled to the clock generation logic and in response to performing a final sample at a single phase of the at least one clock signal to produce a sampled input data signal, selected functionality of the clock control module is disabled.
12. The integrated circuit of claim 2 wherein the clock generation logic arranged to generate at least one clock signal comprises a polyphase generator or one or more delay lines.
13. The integrated circuit of claim 2 wherein the multiple phase separated sampled outputs comprises a plurality of selected initial phases associated with a selected sampling speed.
14. The integrated circuit of claim 13 wherein the plurality of selected initial phases comprises 8-phases, 4-phases or 2-phases.
15. The integrated circuit of claim 2 wherein the integrated circuit is arranged to support third generation or fourth generation communication.
16. A method of sampling data in an electronic device, the method comprises:
receiving input data comprising an input data bit;
performing initial sampling on the input data bit at a plurality of data paths using multiple separated phases of a clock period of at least one clock signal;
producing at the plurality of data paths multiple phase-separated sampled outputs of the input data bit;
performing at the plurality of data paths a number of re-sampling operations on the multiple phase-separated sampled outputs at a number of intermediate phases;
producing at the plurality of data paths multiple phase separated intermediate sampled outputs;
performing a final sample of the multiple phase separated intermediate sampled outputs at a single phase of the at least one clock signal to produce a sampled input data signal;
selecting a clock phase based on the final sample; and
disabling a subset of the plurality of data paths based on the selected clock phase.
17. The method of claim 16 further comprising programming the final sample at the selected clock phase.
18. The integrated circuit of claim 3 wherein the input data is received using one of a plurality of data rates and the sampling logic is arranged to sample input data at either the initial sampling and/or intermediate sampling at multiple sampling phases.