Half-gray digital encoding method and circuitry

Details Half-gray digital encoding method and circuitry Half-gray digital encoding method and circuitry

1995-10-02

1997-05-27

Young, Brian K.

Coded data generation or conversion

Digital code to digital code converters

To or from constant distance codes

341155, H03M 716

Patent

active

056336365

ABSTRACT:
A Half-Gray digital encoding technique is disclosed for use in a parallel analog-to-digital converter (ADC) that reduces the ADC's output errors. A thermometer code, proportional to the ADC's analog input, is provided to a decoder which produces 2.sup.n output lines with one active line for each binary 0-to-1 transition in the thermometer code. A 1-of-(2.sup.n)-to-Half-Gray encoder converts the decoder output to a Half-gray code which has error reducing properties. The Half-Gray code is then provided to an n-bit Half-Gray-to-binary decoder for converting the Half-Gray code to a standard Binary code ADC output.

REFERENCES:
patent: 4445110 (1984-04-01), Breslow
patent: 4963874 (1990-10-01), Matsuzawa et al.
patent: 4975698 (1990-12-01), Kagey
Akazawa et al., "A 400MSOS 8b Flash AD Conversion LSI", ISSCC 87, Session IX: High-Speed ADCs, Feb. 25, 1987, pp. 98 and 375.

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