Apparatus and method for offset voltage correction in an analog

Details Apparatus and method for offset voltage correction in an analog Apparatus and method for offset voltage correction in an analog

1986-12-01

1989-01-17

Shoop, Jr., William M.

Coded data generation or conversion

Converter compensation

341150, 341172, H03M 106

Patent

active

047990422

ABSTRACT:
A charge redistribution analog-to-digital converter is described that permits their ncorporation of offset voltage correction to provide an accurate reflection in the digitalized output signal of the analog input signal. In a distributed capacitor successive approximation device, additional capacitors are added both to a most significant bit array group of capacitors and to a least significant array group of capacitors that are used in conjunction with the offset voltage. The value of the offset voltage is stored in a register and the register determines various switch positions that determine the value of the offset voltage incorporated in the final output voltage.

REFERENCES:
patent: 4399426 (1983-08-01), Tan
patent: 4451821 (1984-05-01), Domogalla

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