Analog-to-digital converter

Details Analog-to-digital converter Analog-to-digital converter

2007-07-24

2007-07-24

Jeanglaude, Jean Bruner (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S155000

Reexamination Certificate

active

11367792

ABSTRACT:
In an analog-to-digital (A-D) converter, an A-D conversion circuit samples an analog signal and converts it to a digital value of a predetermined bit number less than a targeted bit number. An amplifier circuit is provided in parallel to the A-D conversion circuit, and holds the signal sampled by the A-D conversion circuit or amplifies it by a predetermined gain. A first source follower circuit for the amplifier circuit and a second source follower circuit for the A-D conversion circuit are provided separately at the output side of a sample-and-hold circuit.

REFERENCES:
patent: 5014055 (1991-05-01), Dingwall et al.
patent: 6384757 (2002-05-01), Kosonen
patent: 6480128 (2002-11-01), Bach et al.
patent: 6580383 (2003-06-01), Devendorf et al.
patent: 6646584 (2003-11-01), Nagaraj et al.
patent: 2002/0097177 (2002-07-01), Nagaraj et al.
patent: 2003/0117308 (2003-06-01), Kawahito et al.
patent: 9-275342 (1997-10-01), None
Patent Abstracts of Japan, Publication Date 09-275342, Publication Date Oct. 21, 1997, 1 page.

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