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:
Mar. 31, 2020
Filed:
Jan. 14, 2018
Applicant:
Mediatek Inc., Hsin-Chu, TW;
Inventors:
Chen-Yen Ho, New Taipei, TW;
Yu-Hsin Lin, Taipei, TW;
Assignee:
MEDIATEK INC., Hsin-Chu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/45 (2006.01); H03F 1/02 (2006.01); H03F 1/22 (2006.01); H03F 1/48 (2006.01); H03F 3/30 (2006.01);
U.S. Cl.
CPC ...
H03F 1/0222 (2013.01); H03F 1/223 (2013.01); H03F 1/483 (2013.01); H03F 3/303 (2013.01); H03F 3/45183 (2013.01); H03F 3/45237 (2013.01); H03F 2200/102 (2013.01); H03F 2200/252 (2013.01); H03F 2203/30084 (2013.01); H03F 2203/30096 (2013.01); H03F 2203/30099 (2013.01); H03F 2203/30117 (2013.01); H03F 2203/30129 (2013.01); H03F 2203/30132 (2013.01); H03F 2203/45674 (2013.01); H03F 2203/45702 (2013.01); H03F 2203/45726 (2013.01);
Abstract
A linear amplifier is provided to have higher efficiency for an envelope tracking modulator. In one embodiment, a first stage amplifier circuit can be simply operated in a high gain mode or a high bandwidth mode for different applications, without using large chip area. In another embodiment, an output stage has a cascode structure whose dynamic range is controlled according to a voltage level of a supply voltage, to make a core device within the output stage have better protection and suitable dynamic range.