Peak detector
First Claim
1. A method comprising:
- receiving an input signal;
generating pulse edges based on the peaks of the input signal using a peak detection circuit, wherein generating pulse edges based on the peaks of the input signal comprises;
splitting the input signal into a first input signal and a second input signal;
delaying the second input signal with respect to the first input signal;
comparing amplitudes of the first input signal and the delayed second input signal to produce an amplitude differential signal; and
generating the pulse edges using the amplitude differential signal; and
measuring the values of the peaks of the input signal using the generated pulse edges using a sampler circuit, wherein measuring the values of the peaks of the input signal using the generated pulse edges comprises;
aligning the pulse edges with the peaks of the input signal, wherein aligning the pulse edges with the peaks of the input signal comprises delaying the input signal; and
triggering the sampling of the input signal by the pulse edges.
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Accused Products
Abstract
A peak detector provides repeatable and accurate measurements of the signal amplitude for variable frequencies of input signals. The peak detector includes a pulse edge generator circuit that generates a pulse edge signal in response to the signal peaks of an input signal and a sampler circuit that is triggered to sample the input signal by the pulse edge signal. The pulse edge generator circuit compares the input signal with a delayed version of the input signal to produce a differential signal and generates the pulse edge signal using the differential signal. An analog or digital sampler is triggered by the pulsed edge signal to measure the information, e.g., peak value, of the input signal. One or more delay circuits may be used to align the edges of the pulsed edge signal with the peaks of the input signal.
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Citations
20 Claims
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1. A method comprising:
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receiving an input signal; generating pulse edges based on the peaks of the input signal using a peak detection circuit, wherein generating pulse edges based on the peaks of the input signal comprises; splitting the input signal into a first input signal and a second input signal; delaying the second input signal with respect to the first input signal; comparing amplitudes of the first input signal and the delayed second input signal to produce an amplitude differential signal; and generating the pulse edges using the amplitude differential signal; and measuring the values of the peaks of the input signal using the generated pulse edges using a sampler circuit, wherein measuring the values of the peaks of the input signal using the generated pulse edges comprises; aligning the pulse edges with the peaks of the input signal, wherein aligning the pulse edges with the peaks of the input signal comprises delaying the input signal; and triggering the sampling of the input signal by the pulse edges. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for detecting the value of signal peaks of an input signal, the apparatus comprising:
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a pulse edge generator circuit that receives the input signal and generates a pulsed edge signal in response to at least one of positive signal peaks and negative signal peaks, wherein the pulse edge generator circuit divides the input signal into a first input signal and a second input signal, the pulse edge generator circuit comprising; a delay circuit that delays the second input signal with respect to the first input signal; a differential converter circuit that receives the first input signal and the delayed second input signal, the differential converter compares amplitudes of the first input signal and the delayed second input signal to produce an amplitude differential signal; and a comparator circuit that receives the amplitude differential signal, the comparator circuit producing the pulsed edge signal; and a sampler circuit that receives the input signal and the pulsed edge signal, the sampler circuit is triggered to sample the input signal by the pulsed edge signal to produce the value of a signal peak of the input signal; wherein the pulse edge generator generates a pulsed edge signal in response to both the positive signal peaks and the negative signal peaks; wherein the sampler circuit comprises a first sampler that receives the input signal and the pulsed edge signal that is in response to the positive signal peak and a second sampler that receives the input signal and the pulsed edge signal that is in response to the negative signal peak. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method comprising:
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receiving an input signal; generating pulse edges based on the peaks of the input signal using a peak detection circuit, wherein generating pulse edges based on the peaks of the input signal comprises; splitting the input signal into a first input signal and a second input signal; delaying the second input signal with respect to the first input signal; comparing amplitudes of the first input signal and the delayed second input signal to produce an amplitude differential signal; and generating the pulse edges using the amplitude differential signal; and measuring the values of the peaks of the input signal using the generated pulse edges, wherein pulse edges are generated on both the positive peaks and the negative peaks of the input signal and the values of the positive peaks of the input signal are measured using a generated pulse edge using a first sampler circuit and the values of the negative peaks of the input signal are measured a generated pulse edge using a second sampler circuit. - View Dependent Claims (20)
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Specification