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. 07, 2015
Filed:
Mar. 15, 2013
Applicant:
Yoshinobu Sasaki, Tokyo, JP;
Inventor:
Yoshinobu Sasaki, Tokyo, JP;
Assignee:
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/21 (2006.01); H03F 1/02 (2006.01); H03F 3/24 (2006.01); H03F 3/72 (2006.01);
U.S. Cl.
CPC ...
H03F 3/21 (2013.01); H03F 1/0261 (2013.01); H03F 3/245 (2013.01); H03F 3/72 (2013.01); H03F 2200/18 (2013.01); H03F 2200/27 (2013.01); H03F 2200/411 (2013.01); H03F 2203/7206 (2013.01);
Abstract
A power amplifier includes: an amplifier having an input terminal and including an amplifying transistor having a threshold voltage; a transistor supplying a bias to the input terminal of the amplifier according to an on/off signal; a capacitor connected between the input terminal of the amplifier and a grounding point; a resistor connected between the input terminal of the amplifier and the grounding point, in parallel with the capacitor; and a diode connected in series with the resistor. The diode has a threshold voltage that is lower than the threshold voltage of the amplifying transistor.