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. 23, 2015
Filed:
Jan. 09, 2014
Applicant:
Mediatek Inc., Hsin-Chu, TW;
Inventors:
Sheng-Hong Yan, Tainan, TW;
Hao-Ping Hong, Hsinchu County, TW;
Assignee:
MEDIATEK INC., Science-Based Industrial Park, Hsin-Chu, TW;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03F 1/32 (2006.01); H04B 1/04 (2006.01);
U.S. Cl.
CPC ...
H04B 1/0475 (2013.01); H04B 2001/0408 (2013.01);
Abstract
A communication unit includes a radio frequency, RF, transmitter having: a power amplifier, PA, module; and an envelope tracking system operably coupled to the PA module and having a supply modulator arranged to variably control a supply voltage for the PA module in response to a number of input samples of an envelope signal; wherein the envelope tracking system further includes at least one slew rate module arranged to re-distribute a maximum slew rate across the number of input samples in a provision of a variable power supply to the PA module.