COMPOUND SEMICONDUCTOR INTEGRATED CIRCUIT

摘要

PURPOSE:To improve the external circuit driving capacity of a low impedance by constituting a logic circuit part of an FET formed on a compound semiconductor layer and constituting an output buffer part of a bipolar transistor formed on a silicone substrate. CONSTITUTION:An inverter based upon a source coupled FET logic (SCFL) is constituted by forming MESFET T1-T3 and load resistors R1, R2 on the compound semiconductor layer. The output B of the inverter is connected to the base of a bipolar transistor B1 to obtain an opened emitter output C.