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:
May. 13, 2003
Filed:
Apr. 30, 2001
Edward Chak Cheung Ho, Markham, CA;
Nancy Ngar Sze Chan, Richmond Hill, CA;
Hugh Hin-Poon Chow, Richmond Hill, CA;
ATI Technologies, Inc., Thornhill, CA;
Abstract
A method and apparatus for providing serial transmission of a parallel input is accomplished by a parallel input serial output transmitter that includes a shift register operably coupled to receive a parallel input and to provide data serially to a gating circuit. The gating circuit, based on the state of the data it receives, generates a drive signal which causes a switching circuit to route current from first and second current sources to a third current source over different paths to produce a serial output. A bias circuit is coupled to the switching circuit to bias the serial output to a desired level.