Modified quasi-gray digital encoding technique

Details Modified quasi-gray digital encoding technique Modified quasi-gray digital encoding technique

1989-12-08

1990-12-04

Shoop, Jr., William M.

Coded data generation or conversion

Digital code to digital code converters

To or from constant distance codes

341 97, 341 98, H03M 716

Patent

active

049756982

ABSTRACT:
A modified quasi-Gray encoding technique for use in parallel analog-to-digital converters that significantly reduces errors resulting from multiple simultaneous inputs. The encoding technique converts a one-in-(2.sup.n -1) digital code into an n-bit binary word that is the same as quasi-Gray code in all but its least significant bit position, which alternates in the same manner as standard binary code. For many multiple simultaneous inputs, the modified quasi-Gray code substantially reduces errors when compared with quasi-Gray code. For example, the modified quasi-Gray code reduces the maximum error from 3 to 2 for two simultaneous inputs separated by two bit positions (n=8). In a typical parallel analog-to-digital converter employing the modified quasi-Gray code, the one-in-(2.sup.n -1) digital code is converted into modified quasi-Gray code using a read-only memory. The modified quasi-Gray-encoded output of the read-only memory is then converted into standard binary code by a logic circuit requiring only a single gate delay.

REFERENCES:
patent: Re26780 (1970-02-01), Klinikowski
patent: 2831184 (1958-04-01), Petherick
patent: 3383655 (1968-05-01), McRae
patent: 3531798 (1970-09-01), Bureau
patent: 3560959 (1971-02-01), Bergey
patent: 3587089 (1971-06-01), Elliott
patent: 3754238 (1973-08-01), Oswald
patent: 3877025 (1975-04-01), Maio
patent: 3913094 (1975-10-01), Wootton, III
patent: 4058806 (1977-11-01), Nadler
patent: 4125832 (1978-11-01), Shinoda et al.
patent: 4386339 (1983-05-01), Henry et al.
patent: 4591825 (1986-05-01), Bucklen
patent: 4596978 (1986-06-01), Fujita
patent: 4644322 (1987-02-01), Fujita
Akazawa, Yukio et al., "A 400MSPS 8b Flash AD Conversion LSI," 1987 IEEE International Solid-State Circuits Conference, Feb. 25, 1987, pp. 98-99.
Wakimoto, Tsutomu et al., "Si Bipolar 2GS/s 6b Flash A/D Conversion LSI," 1988 IEEE International Solid-State Circuits Conference, Feb. 19, 1988, pp. 232-233.

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