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. 15, 2013
Filed:
Feb. 09, 2011
Bon Hoon Koo, Daejeon, KR;
Ki Yong Son, Daejeon, KR;
Song Cheol Hong, Daejeon, KR;
Gyu Suck Kim, Seoul, KR;
Yoo Sam NA, Seoul, KR;
Bon Hoon Koo, Daejeon, KR;
Ki Yong Son, Daejeon, KR;
Song Cheol Hong, Daejeon, KR;
Gyu Suck Kim, Seoul, KR;
Yoo Sam Na, Seoul, KR;
Samsung Electro-Mechanics Co., Ltd., Gyunggi-do, KR;
Korea Advanced Institute of Science and Technology, Daejeon, KR;
Abstract
There is provided a power amplifier capable of supplying variable bias to an amplifier circuit by accurately transferring the envelope components of an input signal during the supply of active bias power to the amplifier circuit. The power amplifier includes: an envelope detector detecting an envelope of an input signal; a bias power generator including at least one P-type MOSFET and one N-type MOSFET connected to each other in an inverter manner between a driving power terminal supplying driving power having a preset voltage level and a reference bias power terminal supplying preset reference bias power to generate bias power varied according to detection results from the envelope detector; and an amplifier amplifying the input signal according to the bias power level from the bias power generator.