Analog-digital converter circuit

Details Analog-digital converter circuit Analog-digital converter circuit

2008-05-13

2008-05-13

Nguyen, Khai M. (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S122000, C341S159000

Reexamination Certificate

active

11655172

ABSTRACT:
The present invention provides a multi-input A/D converter circuit capable of shorting a conversion time without increasing its layout area and current consumption. When a most significant bit of a binary counter is “L”, individual input signals are sampled by a sample and hold unit, and digital signals held in respective data holders are sequentially selected by a selector. When the most significant bit is brought to “H”, the respective input signals are held as analog signals and compared with each of reference voltages produced corresponding to a digital signal by a DAC. When decision signals outputted from comparators are changed from “L” to “H”, the digital signal at that time is held in the individual data holders as digital signals.

REFERENCES:
patent: 5061926 (1991-10-01), Washiyama
patent: 5861829 (1999-01-01), Sutardja
patent: 5936566 (1999-08-01), Park
patent: 6107949 (2000-08-01), Gross, Jr.
patent: 7102559 (2006-09-01), Van Tuijl
patent: 07-038439 (1995-02-01), None

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