Signal sample acquisition techniques
View Patent ↗A sample acquisition apparatus for sampling first and second signals within a signal processing arrangement, includes a sampler for capturing sections of the waveforms of both the first and second signals, a switch for alternating correction of the sampler to a point in the arrangement where said first signal can be sampled and a point in said arrangement where said second signal can be sampled. A timer for timing the operation of the switch causes the sampler to capture a first waveform section of the first signal and a second waveform section of the second signal, wherein the second signal is responsive to the first signal and the timing of the switch is such that the second section includes a portion that has been generated in response to the first section.
1. Apparatus for sampling first and second signals within a signal processing arrangement, said apparatus comprising a sampler for sampling sections of the waveforms of both the first and second signals, a switch for alternating connection of the sampler to a point in the arrangement where said first signal can be sampled and a point in said arrangement where said second signal can be sampled and a timer for timing the operation of the switch to cause the sampler to sample a first waveform section of said first signal and a second waveform section of said second signal, wherein said second signal is responsive to said first signal and said timer is arranged to utilize a propagation delay between said points so that said second section at least comprises a portion that has been generated in response to said first section.
2. Apparatus according to claim 1 , wherein said timer is arranged to time the operation of said switch such that said sampler samples said first and second sections consecutively.
3. Apparatus according to claim 1 , further comprising a controller arranged to use the samples of the first and second sections to produce one or more control signals for application to said arrangement to control the operation of said arrangement.
4. Apparatus according to claim 3 , wherein said controller comprises a memory for storing values derived from said samples and said controller is arranged to time-align those values that relate to said first signal with those values that relate to said second signal in preparation for deriving from said values said one or more control signals.
5. Apparatus according to claim 3 , wherein said controller is arranged to obtain from said samples values of a parameter, to allocate said values into bins and to average the values within said bins.
6. Apparatus according to claim 3 , wherein said controller is arranged to obtain from said samples values of a parameter, to allocate said values into bins and use ideal values of said parameter for said bins in order to assess the contents of the bins.
7. Apparatus according to claim 3 , wherein the signal processing arrangement comprises an amplifier and at least one of said one or more control signals is for controlling the amount of distortion caused by the amplifier during its operation.
8. Apparatus according to claim 7 , wherein said first signal is a signal to be amplified by said amplifier and said second signal is the result of amplifying said first signal using said amplifier.
9. A signal processing system comprising a signal processing arrangement, a sampler for sampling sections of the waveforms of first and second signals appearing within said arrangement, a switch for alternating connection of the sampler to a point in the arrangement where said first signal can be sampled and a point in said arrangement where said second signal can be sampled, a timer for timing the operation of the switch to cause the sampler to sample a first waveform section of said first signal and a second waveform section of said second signal and a controller for using the samples of the first and second sections to produce one or more control signals for application to said arrangement to control the operation of said arrangement, wherein said second signal is responsive to said first signal and said timer is arranged to utilize a propagation delay between said points so that said second section comprises at least a portion that has been generated in response to said first section.
10. A system according to claim 9 , wherein said timer is arranged to time the operation of said switch such that said sampler samples said first and second sections consecutively.
11. A system according to claim 9 , wherein said controller comprises a memory for storing values derived from said samples and said controller is arranged to time-align those values that relate to said first signal with those values that relate to said second signal in preparation for deriving from said values said one or more control signals.
12. A system according to claim 9 , wherein said controller is arranged to obtain from said samples values of a parameter, to allocate said values into bins and to average the values within said bins.
13. A system according to claim 9 , wherein said controller is arranged to obtain from said samples values of a parameter, to allocate said values into bins and use ideal values of said parameter for said bins in order to assess the contents of the bins.
14. A system according to claim 9 , wherein the signal processing arrangement comprises an amplifier and at least one of said one or more control signals is for controlling the amount of distortion caused by the amplifier during its operation.
15. A system according to claim 14 , wherein said first signal is a signal to be amplified by said amplifier and said second signal is the result of amplifying said first signal using said amplifier.