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.

Date of Patent:
Jan. 16, 2018

Filed:

Feb. 19, 2016
Applicant:

Mitsubishi Electric Corporation, Tokyo, JP;

Inventor:

Tetsuya Heima, Tokyo, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 1/30 (2006.01); H03F 3/21 (2006.01); H03F 1/02 (2006.01); H03F 3/193 (2006.01); H03F 3/45 (2006.01);
U.S. Cl.
CPC ...
H03F 3/211 (2013.01); H03F 1/0205 (2013.01); H03F 3/193 (2013.01); H03F 3/45183 (2013.01); H03F 3/45475 (2013.01); H03F 3/45479 (2013.01); H03F 1/30 (2013.01); H03F 1/301 (2013.01); H03F 1/302 (2013.01); H03F 2200/408 (2013.01); H03F 2200/447 (2013.01); H03F 2200/468 (2013.01); H03F 2200/555 (2013.01);
Abstract

A first transistor has a first terminal and a second terminal. A second transistor has a third terminal, a fourth terminal and a fifth terminal electrically connected to the second terminal of the first transistor during amplification performed by the first transistor. A first bias circuit is electrically connected to the first terminal of the first transistor and supplies a first bias to the first terminal so that a magnitude of the first bias is increased with a rise in circuit temperature. A second bias circuit is electrically connected to the third terminal of the second transistor and supplies a second bias to the third terminal so that the magnitude of the second bias is constantly maintained with respect to changes in the circuit temperature.


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