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:
Jun. 06, 2017
Filed:
Feb. 03, 2016
Applicant:
Socionext Inc., Kanagawa, JP;
Inventors:
Takafumi Nasu, Osaka, JP;
Shinichiro Uemura, Osaka, JP;
Assignee:
SOCIONEXT INC., Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/193 (2006.01); H03G 3/30 (2006.01); H03F 1/02 (2006.01); H03G 1/00 (2006.01); H03F 1/22 (2006.01); H03F 3/45 (2006.01); H03F 1/32 (2006.01);
U.S. Cl.
CPC ...
H03G 3/3036 (2013.01); H03F 1/0205 (2013.01); H03F 1/0277 (2013.01); H03F 1/223 (2013.01); H03F 1/3205 (2013.01); H03F 3/193 (2013.01); H03F 3/45179 (2013.01); H03G 1/0023 (2013.01); H03G 1/0029 (2013.01); H03G 1/0088 (2013.01); H03G 3/3052 (2013.01); H03G 3/3063 (2013.01); H03F 2200/451 (2013.01); H03F 2203/45306 (2013.01);
Abstract
A variable gain transconductance amplifier includes an amplifier transistor connected to an input node, a cascode transistor having a source connected to a drain of the amplifier transistor and having a drain connected to an output node, and a switching circuit connecting or disconnecting a node to which the amplifier transistor and the cascode transistor are connected to or from a fixed potential in a switchable manner. A variable gain circuit may include the variable gain transconductance amplifier.