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:
Jul. 11, 2006
Filed:
Apr. 20, 2004
Ying-yao Lin, Chiao-Hsi Hsiang, TW;
Tung-ming Su, Kao-Hsiung Hsien, TW;
Chao-cheng Lee, Hsin-Chu, TW;
Ying-Yao Lin, Chiao-Hsi Hsiang, TW;
Tung-Ming Su, Kao-Hsiung Hsien, TW;
Chao-Cheng Lee, Hsin-Chu, TW;
Realtek Semiconductor Corp., HsinChu, TW;
Abstract
A variable gain amplifier having a linear decibel-scale gain comprises an amplifying stage for generating an output voltage according to a differential input voltage, and a gain-controlling stage for outputting a gain-controlling voltage to the amplifying stage according to a first controlling voltage and a second controlling voltage. A voltage gain of the variable gain amplifier is inversely proportional to a simple exponential function, and the value of the simple exponential function is determined by the difference between the first controlling voltage and the second controlling voltage.