Hitachi, Ltd.

Keiichi Kitamura

Hiroyuki Tanaka

Yasushi Hatta

Yasushi Takahashi

Kiichi Yamashita

Nobuo Kotera

Tatsuya Kouketsu

Kyosuke Ishikawa

A semiconductor integrated circuit device of a type wherein loads for source follower amplifiers FETs whose gates receive an amplified signal produced from a differential amplifier section and whose each source generates an output signal, comprise first load FETs whose each gate area is small and second load FETs which are respectively series-connected with the first load FETs, whose each gate length is relatively long and each of which has small drain conductance.

Semiconductor integrated circuit device

A logic circuit made up of FET's is disclosed in which an output interface circuit is formed of a source follower circuit including a signal transmitting FET and a constant-current supplying FET, and a ratio of the gate width of the signal transmitting FET to the gate width of the constant-current supplying FET is set so that the high and low levels of the output signal of the logic circuit are independent of the threshold voltage of the FET's.

MESFET circuit with threshold-compensated source-follower output

Growing community of inventors

Kokubunji, Japan

Keiichi Kitamura