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. 14, 2007
Filed:
Jun. 24, 2005
Applicants:
Hideto Takagishi, San Jose, CA (US);
Simon Tsai, Taipei County, TW;
Inventors:
Hideto Takagishi, San Jose, CA (US);
Simon Tsai, Taipei County, TW;
Assignee:
PacificTech Microelectronics, Inc., Grand Cayman, KY;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03F 1/36 (2006.01);
U.S. Cl.
CPC ...
Abstract
In one embodiment, the present invention includes a circuit comprising an amplifier having an input terminal, an output terminal, a positive supply voltage, and a negative supply voltage. The amplifier is configured to have a first gain. A variable feedback circuit is coupled between the input terminal and the output terminal. The difference between the voltage on the output terminal and input terminal is received by the variable feedback circuit, which changes the gain of the circuit and reduces distortion.