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. 17, 2018
Filed:
Aug. 18, 2016
Applicant:
Mediatek Inc., Hsin-Chu, TW;
Inventors:
Lai-Ching Lin, Hsinchu County, TW;
Ming-Da Tsai, Miaoli County, TW;
Assignee:
MEDIATEK INC., Hsin-Chu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 1/22 (2006.01); H03G 3/30 (2006.01); H03F 3/193 (2006.01); H03F 3/21 (2006.01); H03K 5/1532 (2006.01); H03F 1/52 (2006.01); H03F 3/195 (2006.01); H03F 3/24 (2006.01); H03F 3/45 (2006.01); H03F 3/72 (2006.01);
U.S. Cl.
CPC ...
H03G 3/3042 (2013.01); H03F 1/223 (2013.01); H03F 1/523 (2013.01); H03F 3/193 (2013.01); H03F 3/195 (2013.01); H03F 3/21 (2013.01); H03F 3/245 (2013.01); H03F 3/45179 (2013.01); H03F 3/45475 (2013.01); H03F 3/72 (2013.01); H03K 5/1532 (2013.01); H03F 2200/108 (2013.01); H03F 2200/153 (2013.01); H03F 2200/18 (2013.01); H03F 2200/228 (2013.01); H03F 2200/234 (2013.01); H03F 2200/258 (2013.01); H03F 2200/301 (2013.01); H03F 2200/393 (2013.01); H03F 2200/435 (2013.01); H03F 2200/441 (2013.01); H03F 2200/451 (2013.01); H03F 2200/462 (2013.01); H03F 2200/471 (2013.01); H03F 2200/477 (2013.01); H03F 2200/481 (2013.01); H03F 2200/498 (2013.01); H03F 2200/555 (2013.01); H03F 2200/75 (2013.01); H03F 2200/78 (2013.01);
Abstract
The present invention provides a control circuit to stabilize an output power of a power amplifier. The control circuit comprises a voltage clamping loop, a current clamping loop and a loop for reducing power variation under VSWR, where the voltage clamping loop is used to clamp an output voltage of the power amplifier within a defined voltage range, the current clamping loop is used to clamp a current of the power amplifier within a defined current range, and the loop for reducing power variation under VSWR is implemented by an impedance detector to compensate the output power under VSWR variation.