Circuit and method for peak detection of an analog signal

Details Circuit and method for peak detection of an analog signal Circuit and method for peak detection of an analog signal

2007-06-26

2007-06-26

Le, Dinh T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C327S060000

Reexamination Certificate

active

11297191

ABSTRACT:
A fully differential peak detection circuit includes programmable sensitivity and an autozero function. The peak detector has a fully differential charge-coupled analog signal path. The entire analog signal path is autozeroed upon enable and/or in response to sensing a logic zero at the output, where the logic zero follows a logic one. The peak detector includes a differential gain stage for receiving an analog input signal. The differential gain stage includes offset error compensation. The offset error compensation is selected upon enable and/or in response to an output signal of the peak detection circuit and automatically zeros an offset error voltage in response to a predetermined logic state of the output signal. The output of the gain stage is provided to a comparator stage. A plurality of capacitors coupled to the comparator stage stores a predetermined voltage for setting a sensitivity of the peak detector. The sensitivity is programmable during an autozero sequence by applying a predetermined voltage to the plurality of capacitors.

REFERENCES:
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patent: 6051998 (2000-04-01), Lee et al.
patent: 6720812 (2004-04-01), Tumer et al.
patent: 6965257 (2005-11-01), Tanaka

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