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:
Jul. 14, 2020
Filed:
Jul. 17, 2018
Applicant:
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Inventors:
Yasufumi Sakai, Fuchu, JP;
Yoshiyasu Doi, Yokohama, JP;
Assignee:
FUJITSU LIMITED, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03F 3/08 (2006.01); H04B 10/69 (2013.01); H03K 3/356 (2006.01); G01J 1/44 (2006.01); H03F 1/30 (2006.01); H03F 3/30 (2006.01); H03F 3/345 (2006.01);
U.S. Cl.
CPC ...
H03F 3/082 (2013.01); G01J 1/44 (2013.01); H03F 1/308 (2013.01); H03F 3/3022 (2013.01); H03F 3/345 (2013.01); H03K 3/356017 (2013.01); H04B 10/693 (2013.01); H03F 2200/453 (2013.01);
Abstract
A bias circuit includes a replica circuit for an amplifier circuit using a cascode type inverter, and a generation circuit that generates a bias voltage that causes a drain voltage of an input stage transistor of the amplifier circuit to be a saturation drain voltage, based on an output voltage of the replica circuit, and supplies the generated bias voltage to a cascode element of the amplifier circuit and a cascode element of the replica circuit.