Transistor logic circuits operable through feedback circuitry in nonsaturating manner

Claim 1

A TRANSISTOR SWITCHING CIRCUIT OPERABLE IN NONSATURATING MANNER IN RESPONSE TO AN INPUT SIGNAL VARIABLE BETWEE FIRST AND SECOND LEVELS, COMPRISING A REGULATED CURRENT SUPPLY, AN OUTPUT CIRCUIT, A TRANSISTOR CONNECTED IN COMMON EMITTER CIRCUIT CONFIGURATION WITH ITS EMITTER ELECTRODE COUPLED TO SAID SUPPLY AND ITS COLLECTOR ELECTRODE TO SAID OUTPUT CIRCUIT ENABLING THE BASE ELECTRODE OF SAID TRANSISTOR TO RESPOND TO SAID INPUT SIGNAL, SO THAT WHEN SAID SIGNAL IS AT THE FIRST LEVEL SAID TRANSISTOR IS IN A CUTOFF CONDITION PROVIDING A SIGNAL AT A FIRST LEVEL AT SAID OUTPUT CIRCUIT AND WHEN SAID SIGNAL IS AT THE SECOND LEVEL SAID TRANSISTOR IS IN A CONDUCTIVE CONDITION PROVIDING A SIGNAL AT A SECOND LEVEL AT SAID OUTPUT CIRCUIT, SAID SECOND LEVEL BEING DETERMINED BY THE AMOUNT OF CURRENT FLOWING FROM SAID SUPPLY TO SAID EMITTER ELECTRODE, AND A FEEDBACK CIRCUIT COUPLED BETWEEN SAID OUTPUT CIRCUIT AND SAID SUPPLY FOR REGULATING THE AMOUNT OF CURRENT FLOWING FROM SAID SUPPLY TO SAID EMITTER ELECTRODE, WHEREBY SAID TRANSISTOR IS OPERABLE IN NON-SATURATING MANNER.