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:
Apr. 20, 2010
Filed:
Mar. 13, 2006
Michiko Tokumaru, Osaka, JP;
Heiji Ikoma, Nara, JP;
Michiko Tokumaru, Osaka, JP;
Heiji Ikoma, Nara, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A multi-channel current steering DAC (Digital-to-Analog Converter), for example, a 2-channel current steering DAC, includes a plurality of current sources I, I, . . . corresponding to the number of bits of a digital input signal DS in each of channels A, B. Each of the plurality of current sources I, I, . . . is formed by two small-current sources (I, I), (I, I), . . . . In the case where a full-scale current is limited to a small value in any of the channels, one of the two divided current sources is turned off by switches Sa, Sa. Accordingly, a full-scale current of each channel can be adjusted with a common bias circuit without degrading the resolution.