Electronic circuit with a sigma delta A/D converter

Details Electronic circuit with a sigma delta A/D converter Electronic circuit with a sigma delta A/D converter

2006-09-26

2006-09-26

Barnie, Rexford (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

C341S155000, C341S159000

Reexamination Certificate

active

07113119

ABSTRACT:
The A/D convener has a digital output for outputting a digital output signal selected from a set of three or more available values. A feedback loop generates the digital output signal so that a time averaged difference between an analog input signal and an analog feedback signal representative of the digital output signal is minimized. A feedback signal generator generates successive signal levels of the feedback signal. A return to zero switch inserts predetermined return to zero levels between the signal levels in the feedback signal. The return to zero switch is also used to provide the signal level for one of the available values.

REFERENCES:
patent: 5274375 (1993-12-01), Thompson
patent: 6040793 (2000-03-01), Ferguson et al.
patent: 6304608 (2001-10-01), Chen et al.
patent: 6346898 (2002-02-01), Melanson
patent: 6369730 (2002-04-01), Blanken et al.
patent: 6404367 (2002-06-01), Van der Zwan et al.
patent: 6584157 (2003-06-01), Van Der Zwan et al.
patent: 6653958 (2003-11-01), Morche

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