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. 20, 2020
Filed:
Dec. 26, 2018
Applicant:
Rohm Co., Ltd., Kyoto-shi, Kyoto, JP;
Inventors:
Naohiro Nomura, Kyoto, JP;
Takatoshi Manabe, Kyoto, JP;
Assignee:
ROHM CO., LTD., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 1/14 (2006.01); H03F 3/45 (2006.01); H03G 3/30 (2006.01); H03F 1/26 (2006.01);
U.S. Cl.
CPC ...
H03F 3/45273 (2013.01); H03F 1/26 (2013.01); H03F 3/45192 (2013.01); H03F 3/45269 (2013.01); H03F 3/45659 (2013.01); H03G 3/30 (2013.01); H03F 2203/45156 (2013.01); H03F 2203/45338 (2013.01); H03F 2203/45652 (2013.01);
Abstract
An operational amplifier includes a gain boost circuit. The gain boost circuit includes a first differential gm amplifier of a first stage, and a second differential gm amplifier of a post stage. Phase compensation capacitors are provided between inputs and outputs of a system of the second differential gm amplifier.