Class ab complementary direct coupled transistor amplifier

Claim 1

A SIGNAL AMPLIFIER CIRCUIT COMPRISING A DRIVER TRANSISTOR HAVING BASE, EMITTER AND COLLECTOR ELEMENTS; A FIRST OUTPUT TRANSISTOR HAVING BASE, EMITTER AND COLLECTOR ELEMENTS WITH SAID LAST-NAMED BASE ELEMENT CONNECTED TO THE EMITTER ELEMENT OF SAID DRIVER TRANSISTOR; A SECOND OUTPUT TRANSISTOR HAVING BASE, EMITTER AND COLLECTOR ELEMENTS WITH SAID LAST-NAMED BASE ELEMENT CONNECTED TO THE COLLECTOR ELEMENT OF SAID FIRST OUTPUT TRANSISTOR; INPUT MEANS CONNECTED TO THE BASE ELEMENT OF SAID DRIVER TRANSISTOR FOR APPLYING AN INPUT SIGNAL; OUTPUT MEANS CONNECTED TO THE EMITTER ELEMENT OF SAID SECOND OUTPUT TRANSISTOR FOR DERIVING AN OUTPUT SIGNAL; A FIRST SOURCE OF D.C. POTENTIAL WITH ITS POSITIVE SIDE CONNECTED TO THE COLLECTOR ELEMENT OF SAID DRIVER TRANSISTOR AND ITS NEGATIVE SIDE CONNECTED TO A REFERENCE POTENTIAL, A SECOND SOURCE OF D.C. POTENTIAL WITH ITS POSITIVE SIDE CONNECTED TO THE EMITTER ELEMENT OF SAID FIRST OUTPUT TRANSISTOR AND ITS NEGATIVE SIDE CONNECTED TO THE SAID REFERENCE POTENTIAL; A THIRD SOURCE OF D.C. POTENTIAL WITH ITS NEGATIVE SIDE CONNECTED TO THE COLLECTOR ELEMENT OF SAID SECOND OUTPUT TRANSISTOR AND ITS POSITIVE SIDE CONNECTED TO THE SAID REFERENCE POTENTIAL; A FIRST RESISTIVE ELEMENT CONNECTED BETWEEN THE EMITTER ELEMENT OF SAID DRIVER TRANSISTOR AND THE NEGATIVE SIDE OF SAID THIRD SOURCE OF D.C. POTENTIAL; A SECOND RESISTIVE ELEMENT CONNECTED BETWEEN THE COLLECTOR ELEMENT OF SAID FIRST OUTPUT TRANSISTOR AND THE NEGATIVE SIDE OF SAID THIRD SOURCE OF D.C. POTENTIAL; A THIRD RESISTIVE ELEMENT CONNECTED BETWEEN THE EMITTER ELEMENT OF SAID SECOND OUTPUT TRANSISTOR AND THE BASE ELEMENT OF SAID DRIVER TRANSISTOR; A FOURTH RESISTIVE ELEMENT CONNECTED BETWEN THE BASE AND COLLECTOR ELEMENTS OF SAID DRIVER TRANSISTOR; AND UNIDIRECTIONAL CONDUCTING MEANS CONNECTED TO PERMIT CURRENT FLOW FROM THE COLLECTOR ELEMENT OF SAID FIRST OUTPUT TRANSISTOR TO THE EMITTER ELEMENT OF SAID SECOND OUTPUT TRANSISTOR.