Logic integrated circuit device formed on compound semiconductor substrate.

摘要

A gallium arsenide integrate circuit device having compatibility with a silicon emitter-coupled logic device is disclosed. the gallium arsenide integrated circuit device includes a plurality of transistors constituting a logic circuit and an output transistor driving an externally provided load in response to an output of the logic circuit. The output transistor has its threshold voltage that is larger in absolute value than the threshold voltages of the remaining transistor, so that an output signal having the ECL level is produced without sacrificing a power consumption and a semiconductor chip area.