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:
Mar. 06, 2007
Filed:
Apr. 15, 2003
Akira Fujishima, Aichi, JP;
Kenji Adachi, Aichi, JP;
Hirotoshi Takeuchi, Gifu, JP;
Yasuo Oba, Shiga, JP;
Ippei Kanno, Kyoto, JP;
Hiroaki Ozeki, Osaka, JP;
Akira Fujishima, Aichi, JP;
Kenji Adachi, Aichi, JP;
Hirotoshi Takeuchi, Gifu, JP;
Yasuo Oba, Shiga, JP;
Ippei Kanno, Kyoto, JP;
Hiroaki Ozeki, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A high-frequency signal receiver includes a variable gain amplifier for amplifying a high frequency signal input thereto, a local oscillator, a mixer for mixing a signal output from the variable gain amplifier and a signal output from the local oscillator, a filter for receiving a signal output from the mixer, a gain controller for outputting a voltage according to the signal output from the mixer; and a weighting circuit for weighting and summing a control voltage and the signal output from the gain controller for controlling the gain of the variable gain amplifier. The high-frequency signal receiver hence creates a small amount of signal error even when the input signal includes a large interference signal adjacent to a desired signal.