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. 25, 1994
Filed:
Mar. 09, 1993
Yasushi Nishimura, Tokyo, JP;
Pioneer Electronic Corporation, Tokyo, JP;
Abstract
A power amplifier is provided, wherein the output of a first transistor supplied with an input signal at the base thereof is supplied to the base of a second transistor, a current proportional to a collector current of the second transistor is supplied to the emitter of the first transistor by a current mirror circuit, a third transistor is provided for outputting an emitter current in accordance with a base-to-emitter voltage of the second transistor, and emitter currents of the second and third transistors, in accordance with an emitter potential level of the first transistor, is used as an output current. This configuration allows non-linear portions in the transistor characteristics to be cancelled by each other, thereby providing a power amplifier which presents a good linearity.