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:
Apr. 29, 2008
Filed:
Dec. 16, 2005
Sifen Luo, Potomac, MD (US);
Yiping Fan, Fremont, CA (US);
Hongyu LI, Cupertino, CA (US);
Chieh-yuan Chao, Fremont, CA (US);
Sifen Luo, Potomac, MD (US);
Yiping Fan, Fremont, CA (US);
Hongyu Li, Cupertino, CA (US);
Chieh-Yuan Chao, Fremont, CA (US);
Mediatek Inc., Hsin-Chu, TW;
Abstract
The present invention provides methods and apparatuses for an amplifier circuit for amplifying an input signal. An amplifier circuit for amplifying an input signal comprises an amplifying transistor circuit having a power transistor and a dc bias circuit having a plurality of current mirror circuits and a discharge transistor wherein the discharge transistor and the power transistor form a combined current mirror circuit to control quiescent current in the power transistor.