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:
Sep. 15, 1998
Filed:
Sep. 08, 1995
Ryuichi Fujimoto, Tokyo-To, JP;
Hiroshi Tanimoto, Kawasaki, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A gain switching circuit comprises first and second gain stages connected in parallel between the input terminal and the output terminal, and a control unit for allowing the first and second gain stages to be selectively operative, wherein the first and second gain stages respectively include input sections in which input impedance values viewed from the input terminal are substantially equal to each other, and output sections in which output impedance values viewed from the output terminal are substantially equal to each other. By this configuration, a gain switching circuit and a radio apparatus using such a gain switching circuit adapted so that input/output impedance does not fluctuate are provided without implementing switching between gain stages.