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. 29, 2007
Filed:
Feb. 08, 2006
Applicant:
Yung-ming Lee, Taipei Hsien, TW;
Inventor:
Yung-Ming Lee, Taipei Hsien, TW;
Assignee:
Princeton Technology Corporation, Hsin Tien, Taipei County, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 31/113 (2006.01); G11C 7/02 (2006.01); G11C 7/00 (2006.01); H03F 3/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A voltage-controlled amplifier for a signal processing system includes an input voltage reception end, a first voltage-to-current converter, a reference current generator, a gain adjustment circuit, a first current mirror, and an output circuit. The voltage-controlled amplifier adjusts a gain according to a variable control voltage, so as to transfer an input voltage to an output voltage according to the adjusted gain. When adjusting the gain, the present invention changes only an alternating current part of the input voltage, and can decrease noise, the production cost, and increase integration degree.