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. 09, 2015
Filed:
Sep. 24, 2013
Samsung Electro-mechanics Co., Ltd., Suwon, Gyunggi-do, KR;
Young-Jean Song, Gyunggi-do, KR;
Myeong Woo Han, Gyunggi-do, KR;
Jun Goo Won, Gyunggi-do, KR;
Shinichi Iizuka, Gyunggi-do, KR;
Youn Suk Kim, Gyunggi-do, KR;
Ki Joong Kim, Gyunggi-do, KR;
SAMSUNG ELECTRO-MECHANICS CO., LTD., Suwon-Si, Gyeonggi-Do, KR;
Abstract
There are provided a bias circuit and a power amplifier. The bias circuit includes a first temperature compensating unit connected between an operating voltage terminal and a ground and operating according to a reference voltage to generate a turn-on voltage, a second temperature compensating unit connected between a reference voltage terminal and the ground and operating according to the turn-on voltage to generate a control voltage, a power mode selecting unit selecting one of a high power mode and a low power mode and providing an additional current to the first temperature compensating unit at the time of selecting the low power mode to increase the turn-on voltage, and a bias voltage generating unit generating a bias voltage according to the control voltage, wherein the control voltage and the bias voltage are decreased according to the increase in the turn-on voltage.