Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Electric Corporation

Hiroomi Ueda

Akira Inoue

Atsushi Yamamoto

Shintaro Shinjo

Akira Ohta

Noriharu Suematsu

Kazutomi Mori

Hidenori Yukawa

Kazuhisa Yamauchi

Hiroaki Seki

Koichi Fujisaki

A variable frequency amplifier includes a main amplifier systemfor amplifying one of signals into which an input signal is split by a directional couplerto output the amplified signal, and an injection amplifier systemfor adjusting at least one of the amplitude and phase of the other one of the signals into which the input signal is split by the directional coupleraccording to a setting provided thereto from outside the variable frequency amplifier, and for amplifying the other signal and injecting this amplified signal into an output side of the main amplifier system

Variable frequency amplifier

A high frequency amplifier includes a constant voltage driven amplifierusing as its amplifying element a bipolar transistorwith its base biased by a constant voltage, and a constant current driven amplifierusing as its amplifying element a bipolar transistorwith its base biased by a constant current. The idle current of the constant current driven amplifieris set at a low value. In accordance with the idle current, the idle current of the constant voltage driven amplifieris adjusted, and the two amplifiers are combined in parallel.

High-frequency amplifier

Growing community of inventors

Tokyo, Japan

Hiroomi Ueda