Delta-sigma A/D converter

Details Delta-sigma A/D converter Delta-sigma A/D converter

1997-12-31

1999-08-17

Young, Brian

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

341144, H03M 300

Patent

active

059400196

ABSTRACT:
A delta-sigma A/D converter has a delta-sigma modulator that converts an analog signal input thereto into a 1-bit digital bit stream by a delta-sigma modulation wherein the difference between the analog signal and a feedback reference voltage is integrated and quantized, the feedback reference voltage being set to a value greater than a specified maximum level of the analog signal. A data converter is connected to an output of the delta-sigma modulator and converts the 1-bit digital bit stream from the delta-sigma modulator into a multi-bit digital bit stream, using a predetermined conversion value. A decimation filter is connected to an output of the data converter and extracts low frequency components corresponding to the analog signal, contained in the multi-bit digital bit stream from the data converter and outputs multi-bit digital data representative of the analog signal.

REFERENCES:
patent: 4851841 (1989-07-01), Sooch
patent: 5818374 (1998-10-01), Tan
patent: 5870048 (1999-02-01), Kuo et al.

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