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:
Jan. 09, 2001
Filed:
Feb. 19, 1999
Yu Yamaguchi, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A variable gain amplifying device that improves noise figure and third order intermodulation distortion over a wide range of gain. The device includes n stages (where n is an arbitrary natural number more than 1), each stage containing a variable gain amplifier capable of changing gain in accordance with a respective gain control signal. Through lines for bypassing a respective amplifier are arranged in parallel to the amplifiers. Input stage switches are provided at respective input sides of the variable gain amplifiers to change the output signal to be input to the variable gain amplifier or the through line based on the gain control signal. Output stage switches are provided at respective output sides of the variable gain amplifiers to change the signal to be output from the variable gain amplifier or the through line based on the gain control signal. A control circuit outputs the respective control signals to the stages.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile