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:
Sep. 20, 2011
Filed:
Jan. 27, 2010
Applicant:
Masashi Kijima, Kasugai, JP;
Inventor:
Masashi Kijima, Kasugai, JP;
Assignee:
Fujitsu Semiconductor Limited, Yokohama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03M 1/36 (2006.01);
U.S. Cl.
CPC ...
Abstract
An A/D converter includes a plurality of comparators that performs sampling of a plurality of reference voltages and analog input signals during a sampling time, and compares each of the plurality of reference voltages with each of the plurality of analog signals during a comparison time. The A/D converter detects bubbles in thermometer codes obtained from output signals of the plurality of comparators and adjusts a ratio of the sampling time and the comparison time of the plurality of comparators so as to reduce the bubbles.