Logic circuit for converting signals - has multiple emitter transistor with output coupled to true output of logic circuit via series connected resistor and emitter follower

摘要

The logic circuit comprises a logic arrangement and an amplifier which has input coupled to an output of the logic arrangement, and has one of its outputs coupled to at least one true output of the logic circuit. The logic arrangement has its output coupled to the true output of the logic circuit via a resistor and an emitter follower, connected in series, the true output of the amplifier being coupled to the true output of the logic circuit via the emitter follower, and a complement output of the amplifier is coupled to the logic arrangement output. Pref. the logic arrangement comprises a multiple emitter transistor performing logical conversion and forward amplification of the signal. The collector of the multiple emitter transistor is coupled to an input of a current switch which provides for reverse amplification of the signal, and the base of the multiple emitter transistor is coupled toa complement output of the current switch.