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:
Oct. 01, 1991
Filed:
Jul. 18, 1990
Applicant:
Inventor:
Toru Mizumoto, Hino, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Int. Cl.
CPC ...
H03F / ;
U.S. Cl.
CPC ...
330296 ; 330297 ;
Abstract
A power amplifying circuit comprises multi-stage amplifiers connected in cascade, a first switching circuit connected to the last stage amplifier, a second switching circuit connected to the amplifiers other than the last stage amplifier, and an output power adjusting circuit connected to the switching circuit, for controlling a bias voltage. The bias voltage of the last stage amplifier and the bias voltages of the other stage amplifiers are controlled separately from each other by the first and second switching circuits, respectively.