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:
Mar. 03, 2009
Filed:
Jul. 13, 2006
Applicants:
Tawen Mei, Mountain View, CA (US);
Thomas Yang, Milpitas, CA (US);
Inventors:
Tawen Mei, Mountain View, CA (US);
Thomas Yang, Milpitas, CA (US);
Assignee:
National Semiconductor Corporation, Santa Clara, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F 3/08 (2006.01); G05F 1/565 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for sensing current independently of variations in operating conditions is provided that includes generating a switch signal at a switching element. A reference signal is generated at a reference signal generator that is operable to track the switching element. A sense signal is generated based on the switch signal. An output current of the switching element is sensed based on a difference between the reference signal and the sense signal.