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:
Nov. 26, 2002
Filed:
Feb. 23, 2001
Keiichi Oguro, Kawasaki, JP;
Masafumi Shigaki, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An amplifier apparatus including a first dividing circuit disposed at the input side of an amplifier, for dividing an input signal into a primary signal to be amplified by the amplifier and an auxiliary signal for distortion detection, a distortion compensating signal generating circuit for generating a distortion compensating signal, based on the auxiliary signal and the output of the amplifier, to compensate a distortion component contained in the output of the primary amplifier and inputting the generated signal into the amplifier, and a primary signal combining circuit for combining the primary signal obtained by the first dividing circuit 1 with the distortion compensating signal. The result is that even using an auxiliary amplifier whose gain is small or without using such auxiliary amplifier in a feedback system, the distortion component contained in the output of the amplifier can be effectively compensated.