The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 10, 2006
Filed:
Jul. 14, 2004
Hisao Suzuki, Kasugai, JP;
Shogo Itoh, Kasugai, JP;
Hisao Suzuki, Kasugai, JP;
Shogo Itoh, Kasugai, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
It is intended to provide an A/D converter circuit with which, by using a clock signal, on the basis of an analog voltage inputted a predetermined time past, it is possible to select suitably comparators to be operated and comparators to be rested, and which has small consumed power. A parallel-type A/D-converter circuitconverts an analog voltage VIN to a digital value DOUT at intervals of a predetermined period by means of a clock signal CLK using chopper-type comparators. The comparatorscan each be set by first and second setting signals CONTA etc. to either of an operating state and a resting state. A comparator control circuit sectionperforms logical processing on the comparator outputs OUT–OUTin the preceding conversion to generate the first and second setting signals CONTA etc., and brings some of the comparators to the operating state and holds the remaining comparators in the resting state.