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. 17, 2010
Filed:
May. 29, 2008
Applicant:
Ching-chung Lee, Tainan County, TW;
Inventor:
Ching-Chung Lee, Tainan County, TW;
Assignee:
Himax Technologies Limited, Fonghua Village, Sinshih Township, Tainan County, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
An operational amplifier includes an amplifying circuit and a bais current generating circuit. The bias current generating circuit generates a bias current to the amplifying circuit. The amplifying circuit comprises a current adjusting unit and a current mirror. The current adjusting circuit has a storage element, receives a reference current and generating a passing current. The passing current is gradually adjusted utilizing the storage element according to a control signal. The current mirror receives the passing current to generate the bias current.