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. 21, 2003
Filed:
Jun. 22, 2001
Hidehiko Kuroda, Tokyo, JP;
Abstract
The variable gain amplifier includes a parallel connection of resistance R and capacitor C Resistance R may be replaced by inductance L, and bipolar transistors may be replaced by other types such MOS transistors. Resistance R gives a current feedback for transistor Q thereby lowering the mutual conductance “gm” of transistor Q and limiting the current flowing from voltage supply V The emitter area ratio (the emitter area of transistor Q the emitter area of Q ) made to be 1: n where “n” is greater than or equal to 1, thereby controlling each current. Capacitor C is connected in parallel with R connected with the base of transistor Q is a bypass capacitor for lowering the impedance of the base of transistor Q in higher frequency range. Capacitor C is a peaking capacitor, because it improves the high frequency characteristics.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile