Signal processor that uses a delta-sigma modulation

Details Signal processor that uses a delta-sigma modulation Signal processor that uses a delta-sigma modulation

1992-04-28

1993-05-04

Hoff, Marc G.

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

341110, H03M 302

Patent

active

052085945

ABSTRACT:
A signal processing system comprises a delta-sigma modulation unit supplied with an input analog signal for producing one-bit data as a result of a delta-sigma modulation, an arithmetic unit supplied with the output one-bit data of the delta-sigma modulation unit for applying a predetermined arithmetic operation thereon, an integration unit for integrating an output of the arithmetic unit to produce multiple-bit data as an output, a comparator unit supplied with the multiple-bit data from the integration unit at a first input port and multiple-bit reference data at a second input port for producing one-bit data as a result of comparison, a feedback unit supplied with the output of the comparator unit for producing the multiple-bit reference data based upon the one-bit data produced by the comparator unit such that said reference data predicts the multiple-bit data supplied to the first input port, and a digital-to-analog conversion unit supplied with said output one-bit data of the comparator unit for converting the same to an analog output signal.

REFERENCES:
patent: 3857111 (1974-12-01), Deschenes et al.
patent: 4355304 (1982-10-01), Kasuga et al.
patent: 4811019 (1989-03-01), Julstrom et al.
patent: 4901077 (1990-02-01), Christopher
patent: 4983967 (1991-01-01), McKenzie
patent: 5068661 (1991-11-01), Kaneaki et al.
patent: 5115241 (1992-05-01), Ishikawa

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