Analog-to-digital converter with error checking and correction c

Details Analog-to-digital converter with error checking and correction c Analog-to-digital converter with error checking and correction c

1987-03-09

1988-09-27

Miller, Charles D.

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

341120, H03M 110, H03M 136

Patent

active

047744987

ABSTRACT:
An analog-to-digital converter (10) comprises a set of comparators (12a-12f) for providing a set of different output signals whose logic states are a function of an analog input signal voltage and one or more reference voltage signals supplied by a resistive network (16). The comparators are connected to a decoder (20) for processing the thermometer code outputs of the comparators to generate a digital word output corresponding to the voltage amplitude of the analog signal. Several of the comparators are also connected to an error checking network (22), including a preconditioning circuit (100) and a detection circuit (102) for processing these comparator outputs to provide an error signal whenever one or more of the comparators are not operating properly. The error checking network and decoder are connected to an error correction circuit (26) for correcting the digital word signal in accordance with the error signal. Also, comparator circuits are provided which are well-adapted for high-speed operation and error checking.

REFERENCES:
patent: 4183016 (1980-01-01), Sawagata
patent: 4386339 (1983-05-01), Henry
patent: 4456904 (1984-06-01), van de Grift

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