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:
Nov. 25, 2008
Filed:
Mar. 28, 2005
Shinichi Abe, Kyoto, JP;
Jun Maede, Kyoto, JP;
Masanori Fujisawa, Kyoto, JP;
Akio Fujikawa, Kyoto, JP;
Shinichi Abe, Kyoto, JP;
Jun Maede, Kyoto, JP;
Masanori Fujisawa, Kyoto, JP;
Akio Fujikawa, Kyoto, JP;
Rohm Co., Ltd., Tokyo, JP;
Abstract
A D/A converter circuit includes a first current mirror circuit and a second current mirror circuit. The first current mirror circuit has a plurality of output side transistors provided correspondingly to digits of data to be converted and generates en analog current by obtaining, in at least one of the output side transistors, a current corresponding to the weight of the digit of the data being converted. The second current mirror circuit is connected on an upstream or downstream side of the output side transistors and corresponding to a lower digit of the data. An analog current is generated with the second current mirror circuit by obtaining a current corresponding to a weight of a digit that is less than 1.