US Patent Issued to Fujikura on June 2 for "Variable gain amplifier" (Japanese Inventors)

ALEXANDRIA, Va., June 2 -- United States Patent no. 12,647,081, issued on June 2, was assigned to Fujikura Ltd. (Tokyo).

"Variable gain amplifier" was invented by Chihiro Kamidaki (Sakura, Japan), Yo Yamaguchi (Sakura, Japan) and Tatsuo Kubo (Sakura, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A variable gain amplifier includes a differential amplifier circuit having a pair of input terminals and a pair of output terminals, and a first variable attenuation circuit connected between at least one of the pair of input terminals and the pair of output terminals of the differential amplifier circuit and capable of switching a resistance value on the basis of a control signal which is input from the outsi...