Analog-digital conversion cell and analog-digital converter

Details Analog-digital conversion cell and analog-digital converter Analog-digital conversion cell and analog-digital converter

2011-07-26

2011-07-26

JeanPierre, Peguy (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S144000

Reexamination Certificate

active

07986258

ABSTRACT:
There is provided an analog-digital conversion cell being an analog-digital conversion cell that performs an N-bit analog-digital conversion (where N is a natural number) and including: a comparison circuit (202) comparing an analog input signal VI based on a plurality of reference voltages and outputting a first digital code DA selected from Q digital codes (where Q is a natural number equal to or more than 2N+1 and equal to or less than 2N+1−1) in accordance with a size of the analog input signal VI; a first logic operation circuit (203) outputting a second digital code DB selected from Q digital codes, which is expressed by DB=DA×KA+DB0where a constant KA is a decimal number satisfying a condition of 1<KA<2 and DB0is a constant, based on the first digital code DA; and an analog operation circuit (201) outputting an analog output signal VO expressed by VO=A×(VI−DA×KA×(VR/A)) where A and VR are constants, based on the first digital code DA and the analog input signal VI.

REFERENCES:
patent: 6784824 (2004-08-01), Quinn
patent: 6803873 (2004-10-01), Motomatsu
patent: 7002504 (2006-02-01), McMahill
patent: 2005/0110670 (2005-05-01), Cho et al.
patent: 2004-343292 (2004-12-01), None
patent: 2006-74549 (2006-03-01), None

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