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. 03, 2020
Filed:
Mar. 23, 2016
Mitsubishi Electric Corporation, Tokyo, JP;
Koji Tsutsumi, Tokyo, JP;
Takanobu Fujiwara, Tokyo, JP;
Atsushi Kato, Tokyo, JP;
Shinichi Inabe, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
A variable gain amplifier () includes: a signal transmission circuit () including amplifying transistor units (to, andto) connected in parallel between a signal input port (P,N) and a signal output port (P,N); a load circuit () connected between a supply line of power supply voltage (VDD) and an output end of the signal transmission circuit (); a signal short circuit () including a short-circuit transistor unit () connected between the supply line of the power supply voltage (VDD) and an input end of the signal transmission circuit (), a constant-current source circuit (), and a transistor control circuit (). The transistor control circuit () selects transistor units to be turned on, from among the amplifying transistor units (to, andto) and the short-circuit transistor unit (), and supplies control voltages for turning on the selected transistor units.