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:
Dec. 18, 2018
Filed:
May. 19, 2017
Applicant:
Analog Devices Global, Hamilton, BM;
Inventors:
Hanqing Wang, Beijing, CN;
Gerard Mora-Puchalt, Catarroja, ES;
Assignee:
Analog Devices Global, Hamilton, BM;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/00 (2006.01); H03F 1/02 (2006.01); H03F 1/32 (2006.01); H03F 1/56 (2006.01); H03F 3/393 (2006.01); H03F 3/42 (2006.01); H03F 3/45 (2006.01); H03F 1/14 (2006.01); H03F 3/387 (2006.01); H03M 3/00 (2006.01);
U.S. Cl.
CPC ...
H03F 3/005 (2013.01); H03F 1/02 (2013.01); H03F 1/14 (2013.01); H03F 1/3211 (2013.01); H03F 1/56 (2013.01); H03F 3/387 (2013.01); H03F 3/393 (2013.01); H03F 3/426 (2013.01); H03F 3/45071 (2013.01); H03F 3/45475 (2013.01); H03M 3/00 (2013.01); H03F 2200/213 (2013.01); H03F 2200/267 (2013.01); H03F 2200/271 (2013.01); H03F 2200/378 (2013.01); H03F 2203/45458 (2013.01); H03F 2203/45514 (2013.01); H03M 3/496 (2013.01);
Abstract
A capacitive gain amplifier circuit amplifies an input signal by a pair of differential amplifier circuits couples in series. The first differential amplifier circuit is reset during an autozero phase while disconnected from the second differential amplifier circuit, and the first and second differential amplifier circuits are connected together in series during a chop phase. A set of feedback capacitors is selectively switched in between respective outputs of the second differential amplifier circuit and respective inputs of the first differential amplifier circuit during the chop phase.