Analog-to-digital converter error correction circuit

Details Analog-to-digital converter error correction circuit Analog-to-digital converter error correction circuit

1987-02-09

1987-12-08

Miller, Charles D.

Communications: electrical

Audible indication

Percussion-type sound producer

340347AD, 371 30, H03M 106

Patent

active

047120878

ABSTRACT:
An error correction circuit (16) corrects errors in the thermometer code (T.sub.1 -T.sub.7) developed by a parallel or "flash" analog-to-digital converter (10). The error correction circuit employs plural similar bit exchange modules (34) of which each includes a 2-input OR gate (46) having common inputs (48 and 50) that constitute the inputs of the bit exchange module. The output (52) of the AND gate and the output (54) of the OR gate constitute the outputs of the bit exchange module. The bit exchange modules receive the digital-to-analog converter thermometer code and are interconnected to correct errors therein resulting from the presence of more than one transition between different logic states for adjacent bits in the thermometer code. The error correction circuit manipulates the thermometer code bits to provide a corrected thermometer code (T.sub.1C -T.sub.7C) that has only one transition between different logic states for adjacent bits thereof.

REFERENCES:
patent: 4600916 (1986-07-01), Masuda

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