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. 07, 2007
Filed:
Mar. 24, 2005
Rahul Bhatia, Irvine, CA (US);
Sang-hyun Woo, Seoul, KR;
Ji-hoon Bang, Seongnam-si, KR;
Seong-soo Lee, Suwon-si, KR;
Chang-ho Lee, Marietta, GA (US);
Joy Laskar, Atlanta, GA (US);
Rahul Bhatia, Irvine, CA (US);
Sang-Hyun Woo, Seoul, KR;
Ji-Hoon Bang, Seongnam-si, KR;
Seong-Soo Lee, Suwon-si, KR;
Chang-Ho Lee, Marietta, GA (US);
Joy Laskar, Atlanta, GA (US);
Samsung Electronics Co., Ltd., , KR;
Georgia Tech Research Corporation, Atlanta, GA (US);
Abstract
Provided is a multiband low noise amplifier including a first transistor, an input matching circuit, and a first capacitor. The first transistor includes a collector electrically connected to a first power supply, a grounded emitter, and a base connected to the other end of a first inductor having one end as an input end of the low noise amplifier. The input matching circuit is connected between the collector and the base of the first transistor. The first capacitor connected to the collector of the first transistior. The input matching circuit includes a varactor. The input matching circuit includes a second capacitor connected to the varactor. The input matching circuit includes a first resistor connected to the varactor. In the multiband low noise amplifier, a varactor having a variable capacitance is installed at an input end, thereby easily performing band switching through bias voltage control by a small amount and minimizing noises that may be caused by a control signal.