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:
May. 25, 2021
Filed:
Jun. 20, 2017
Applicant:
Sony Semiconductor Solutions Corporation, Kanagawa, JP;
Inventor:
Yoshikatsu Jingu, Kanagawa, JP;
Assignee:
Sony Semiconductor Solutions Corporation, Kanagawa, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03G 3/00 (2006.01); H03G 3/30 (2006.01); H03F 1/02 (2006.01); H03G 1/00 (2006.01); H03F 3/21 (2006.01); H03F 1/08 (2006.01); H03F 1/12 (2006.01); H03F 3/347 (2006.01); H03F 3/68 (2006.01);
U.S. Cl.
CPC ...
H03G 3/30 (2013.01); H03F 1/0283 (2013.01); H03F 1/086 (2013.01); H03F 1/12 (2013.01); H03F 3/211 (2013.01); H03F 3/347 (2013.01); H03F 3/68 (2013.01); H03G 1/0029 (2013.01); H03F 2200/129 (2013.01); H03F 2200/72 (2013.01); H03G 2201/40 (2013.01); H03G 2201/506 (2013.01);
Abstract
A signal amplifier device is provided to ensure the continuity of the gain of an amplifier. The signal amplifier device includes a main path and a sub path connected in parallel to the main path. A main path first amplifier circuit amplifies an input signal on the main path. A main path second amplifier circuit includes a common-gate transistor connected in series with an output of the main path first amplifier circuit without sharing a DC current. On the main sub path, the sub path amplifier circuit amplifies the input signal by using a gain lower than the maximum gain in the main path.