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:
Aug. 15, 2000
Filed:
May. 21, 1998
William Redman-White, West Wellow, GB;
Mark Bracey, Sunnyvale, CA (US);
U.S. Philips Corporation, New York, NY (US);
Abstract
A digital to anologue converter comprises a plurality of current sources (T.sub.o -T.sub.n) and corresponding selection switches (D.sub.o -D.sub.n) which connect the current sources to an output (3). In order to enable a constant capacitance to be presented at the output (3) regardless of the input digital code a plurality of dummy current sources (T.sub.o -T.sub.n) which take the same form as the current sources (To-T.sub.n) are provided. The dummy current sources have associated selection switches ( D.sub.o -D.sub.n) which are operated by the logical inverse of the code applied to the current sources (T.sub.o -T.sub.n).