A/D converter

Details A/D converter A/D converter

1989-03-21

1990-07-31

Shoop, Jr., William M.

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

341122, 341155, H03M 112

Patent

active

049453599

ABSTRACT:
Herein disclosed is an oversampling type A/D converter, wherein there are connected in multiple stages units interpolation type A/D conversion circuits each including: an analog integration circuit for integrating the difference between an analog input signal and a feedback signal; a voltage comparison circuit for adding the integrated signal and said difference to produce a digital signal on the basis of the added value; a digital integration circuit for integrating the digital signal coming from the voltage comparison circuit; a feedback load D/A conversion circuit for producing a feedback signal from the output of the digital integration circuit; and an addition circuit for adding the output and input of said digital integration circuit.

REFERENCES:
patent: 4017849 (1977-04-01), Tewksbury
patent: 4384278 (1983-05-01), Benjamin
patent: 4588981 (1986-05-01), Senn
patent: 4672361 (1987-06-01), Kokubo et al.
patent: 4704600 (1987-11-01), Uchimura et al.
patent: 4772871 (1988-09-01), Suzuki et al.
patent: 4789862 (1988-12-01), Jackson
patent: 4876542 (1989-10-01), van Bavel et al.
ICASSP 85, Proc. Technical Papers, 36.7.1-36.7.4 (1985), pp. 1400-1403.
ISSCC 86, Dig. Technical Papers, THPM 14.6 (1986), pp. 182-183.
ISSCC 87, Dig. Technical Papers, WAM 3.5 (1987), pp. 48-49.

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