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:
Dec. 06, 2007
Applicant:
Wei-che Chiu, Hsinchu, TW;
Inventor:
Wei-Che Chiu, Hsinchu, TW;
Assignee:
Richtek Technology Corp., Hsinchu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/45 (2006.01);
U.S. Cl.
CPC ...
Abstract
A variable bias current is provided for the differential pair of an operational transconductance amplifier to improve the gain performance, especially to overcome the slew rate limit of the operational transconductance amplifier. The bias current is adjusted according to the differential input to the differential pair, the difference between the currents of the differential pair, or any one of the currents of the differential pair.