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:
Jan. 01, 2013
Filed:
May. 11, 2011
Fangping Fan, Chengdu, CN;
Fangping Fan, Chengdu, CN;
IPGlobal Microelectronics (SiChuan) Co., Ltd., Chengdu, Sichuan Province, CN;
Abstract
A common-mode feedback circuit includes an amplifying circuit, a biasing circuit connected with the amplifying circuit, and a feedback loop connecting the amplifying circuit with the biasing circuit. The feedback loop includes a first field effect transistor M, a eighth field effect transistor MB connected with the first field effect transistor M, a tenth field effect transistor MB and an eleventh field effect transistor MFB connecting the eighth field effect transistor MB and the tenth field effect transistor MB. The common-mode voltage value of the common-mode feedback circuit is adjusted by the eleventh field effect transistor MFB. The common-mode feedback circuit has the simple structure and is capable of achieving the common-mode feedback without the peripheral feedback circuit and the input reference voltage.