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. 27, 2007
Filed:
Aug. 06, 2003
Miho Ozawa, Kanagawa, JP;
Miho Ozawa, Kanagawa, JP;
Sony Corporation, , JP;
Abstract
A gain-controlled amplifier capable of dealing with the system for performing the receiving operation continuously, and capable of correcting a change of a DC offset owing to an operation condition such as temperature; a receiver circuit using the gain-controlled amplifier; and a radio communication device installing the receiver circuit. In a gain-controlled amplifier composed of three GCA stages ()–() connected by cascade connection, the center value of an output DC of each GCA stage ()–() is kept to be constant by a common feedback circuit ()–() provided correspondingly to each of the GCA stages ()–(), and a DC feedback quantity is made to be changed according to a gain control voltage VG by means of a DC feedback circuit () provided between an output side of a last stage of the GCA stages and an input side of a first stage of the GCA stages.