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:
Oct. 29, 2019
Filed:
Mar. 05, 2018
Applicant:
Mediatek Inc., Hsin-Chu, TW;
Inventors:
Tsun-Yuan Fan, Changhua County, TW;
Tze-Chien Wang, Hsinchu County, TW;
Assignee:
MEDIATEK INC., Hsin-Chu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 1/34 (2006.01); H03F 3/45 (2006.01); H03F 1/32 (2006.01); H01L 49/02 (2006.01);
U.S. Cl.
CPC ...
H03F 1/34 (2013.01); H01L 28/20 (2013.01); H03F 1/3211 (2013.01); H03F 3/45475 (2013.01); H03F 3/45479 (2013.01); H03F 2203/45151 (2013.01); H03F 2203/45524 (2013.01); H03F 2203/45528 (2013.01); H03F 2203/45601 (2013.01); H03F 2203/45698 (2013.01); H03F 2203/45701 (2013.01);
Abstract
The present invention provides an amplifier circuit, wherein the amplifier circuit includes an operational amplifier and a feedback path. The operational amplifier has an input terminal and an output terminal, and is arranged for receiving an input signal to generate an output signal. The feedback path is coupled between the input terminal and the output terminal of the operational amplifier, wherein the feedback path comprises at least two poly resistors, and a depletion region of at least one of the two poly resistors is biased by the output signal generated by the operational amplifier.