Flash analog-to-digital converter with reduced number of resisto

Details Flash analog-to-digital converter with reduced number of resisto Flash analog-to-digital converter with reduced number of resisto

1999-01-04

2000-10-03

JeanPierre, Peguy

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

341154, H03M 112

Patent

active

061279595

ABSTRACT:
A flash analog-to-digital converter reduces a property mismatching problem which may occur due to process variations by reducing the number of comparators and resistors as compared to conventional converters. A half code generator receives an analog signal and outputs a one-bit middle code and a (m/2-1)-bit half thermometer code in response to a system clock signal, where m=2.sup.n and n is a positive integer. A code generator receives the middle code and the (m/2-1)-bit half thermometer code, performs a logic operation with respect to the middle code and the half thermometer code, and outputs an operation result as a (m-1)-bit full thermometer code. An encoder encodes the (m-1)-bit full thermometer code into n-bit binary data.

REFERENCES:
patent: 4849759 (1989-07-01), Hughes
patent: 5623265 (1997-04-01), Pawar et al.
patent: 5821893 (1998-10-01), Kumamoto et al.
patent: 6011503 (2000-01-01), Lee

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