A high speed, non-inverting circuit for providing an interface between TTL logic gates and Schottky transistor logic gates

摘要

A high speed, noninverting circuit for providing an interface between transistor-transistor logic gates and Schottky transistor logic gates. In one embodiment the output of a TTL circuit is coupled through a Schottky diode to an emitter-follower whose input is Schottky clamped. The output of the emitter-follower is coupled to a constant current sink and to the cathode of a low barrier Schottky diode, the anode of which forms the STL-compatible output of the interface circuit. The present circuit thus performs a noninverting level translation with minimum propagation delay.