Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Electric Corporation

Fumimasa Kitabayashi

Noriharu Suematsu

Yoshitada Iyama

Kazuya Yamamoto

Yukio Ikeda

Miyo Miyashita

Kazutomi Mori

Katsuya Kato

Masayoshi Ono

Suguru Maki

Eri Fukuda

Shintarou Shinjo

Kensuke Nakajima

A cascode amplifier includes: first transistors; second transistors cascode-connected with respective first transistors; a first line connected at spaced points to control terminals of the first transistors; a second line connected at spaced points to control terminals of the second transistors; and a capacitance connected between one end of the second line and ground. The second line includes at least two lines connected in parallel with each other.

Cascode amplifier

An inter-stage matching circuit comprises a one-stage high pass filter type matching unit and a one-stage low pass filter type matching unit serially connected with each other.

Multistage amplifier

An operational command signal is output to one of an amplifier or a variable damper depending on the signal level of a high frequency signal.

Semiconductor circuit

An unbalance-to-balance converter includes an FET and a balanced output adjusting capacitor connected between the source terminal of the FET and an earth conductor. The balanced output adjusting capacitor has a capacitance value equal to a capacitance difference Cpd-Cps between a drain side parasitic capacitance Cpd and a source side parasitic capacitance Cps. This makes it possible to solve a problem involved in a conventional unbalance-to-balance converter in that when the drain side parasitic capacitance Cpd differs from the source side parasitic capacitance Cps, a pair of balanced signals output from the drain terminal and source terminal do not have the same amplitude and are not in complete opposition.

Unbalance-to-balance converter utilizing a transistor

Growing community of inventors

Tokyo, Japan

Fumimasa Kitabayashi