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. 18, 2022
Filed:
Jun. 13, 2019
Applicant:
Mediatek Inc., Hsin-Chu, TW;
Inventors:
Yu-Hsien Chang, Hsin-Chu, TW;
Yu-Ming Lai, Hsin-Chu, TW;
Ching-Chia Cheng, Hsinchu, TW;
Wei-Kai Hong, Hsinchu, TW;
Yi-Chu Chen, Hsinchu, TW;
Tsung-Ming Chen, Hsinchu, TW;
Shih-Chieh Yen, Hsinchu, TW;
Assignee:
MEDIATEK INC., Hsin-Chu, TW;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03F 1/32 (2006.01); H03F 1/02 (2006.01); H03F 3/193 (2006.01); H03F 3/21 (2006.01);
U.S. Cl.
CPC ...
H03F 1/0205 (2013.01); H03F 1/3241 (2013.01); H03F 1/3247 (2013.01); H03F 3/193 (2013.01); H03F 3/21 (2013.01);
Abstract
A calibration apparatus is used for calibrating characteristics of a power amplifier (PA) in a transmitter. The calibration apparatus includes an adaptive bias generator circuit that is used to track an envelope of an input signal received by control terminals of transistors of the PA and generate an adaptive bias voltage to the control terminals of the input transistors in response to the envelope of the input signal.