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:
Jun. 19, 2007
Filed:
Aug. 05, 2005
Chin-wen Huang, Dashe Township, Kaohsiung County, TW;
Chin-Wen Huang, Dashe Township, Kaohsiung County, TW;
Realtek Semiconductor Corp., Hsinchu, TW;
Abstract
A differential amplifier comprises an operational amplifier, comprising a positive output terminal, a negative output terminal, and a feedback terminal; a common mode sensing circuit coupled to the positive output terminal and the negative output terminal, for generating a sensed common mode voltage of the positive output terminal and the negative output terminal of the operational amplifier; and a feedback circuit comprising a common mode input terminal for receiving the sensed common mode voltage, a reference input terminal for receiving a reference voltage, and a first resistive component coupled between the common mode input terminal and the reference input terminal, the feedback circuit generating a feedback signal according to the common mode voltage and the reference voltage; wherein the feedback terminal of the operational amplifier receives the feedback signal of the feedback circuit.