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. 07, 2009
Filed:
Jul. 09, 2007
Hoang Duong Quoc, Daejeon, KR;
Sang Gug Lee, Daejeon, KR;
Jeong Hoon Kim, Gyunggi-do, KR;
Tah Joon Park, Gyunggi-do, KR;
Eung Ju Kim, Gyunggi-do, KR;
Hoang Duong Quoc, Daejeon, KR;
Sang Gug Lee, Daejeon, KR;
Jeong Hoon Kim, Gyunggi-do, KR;
Tah Joon Park, Gyunggi-do, KR;
Eung Ju Kim, Gyunggi-do, KR;
Samsung Electro-Mechanics Co., Ltd., Suwon, Gyunggi-Do, KR;
Information and Communications University Research and Industrial Cooperation Group, Daejeon, KR;
Abstract
A variable gain amplifier including: a differential amplification unit amplifying and outputting a difference between a first input signal and a second input signal inputted via a first input terminal and a second input terminal, respectively, according to a first bias current of the first input terminal and second input terminal, to a first output terminal and a second output terminal; a diode-connected load unit comprising loads diode-connected to the first output terminal and second output terminal, respectively, the load receiving a second bias current; and a gain control unit controlling a gain between the input terminals and the output terminals of the differential amplification unit by controlling the size of the first bias current and second bias current.