Source

Claim 1

A TRANSISTOR AMPLIFIER FOR DRIVING A LOAD HAVING A FIRST AND SECOND END FROM A SOURCE OF SIGNALS COMPRISING FOUR TRANSISTORS EACH HAVING A COLLECTOR, EMITTER AND BASE ELECTRODE, MEANS RESPECTIVELY COUPLING THE EMITTER OF A FIRST OF SAID TRANSISTORS TO THE COLLECTOR OF A SECOND OF SAID TRANSISTORS AND TO SAID FIRST END OF SAID LOAD, MEANS RESPECTIVELY COUPLING THE EMITTER OF A THIRD OF SAID TRANSISTORS TO THE COLLECTOR OF A FOURTH OF SAID TRANSISTORS AND TO SAID SECOND END OF SAID LOAD, MEANS FOR ESTABLISHING A QUIESCENT CURRENT FOR SAID FIRST AND SECOND TRANSISTORS, SAID MEANS INCLUDING A FIRST RESISTOR IN SERIES WITH SAID FIRST TRANSISTOR COLLECTOR, A FIFTH TRANSISTOR HAVING COLLECTOR, EMITTER AND BASE ELECTRODES, AND, SAID FIFTH TRANSISTOR BEING OF A TYPE WHICH IS COMPLEMENTARY TO THE TYPES OF SAID FIRST AND SECOND TRANSISTORS, AND MEANS FOR COUPLING SAID FIFTH TRANSISTOR BETWEEN SAID FIRST TRANSISTOR COLLECTOR AND SAID SECOND TRANSISTOR BASE TO ESTABLISH CURRENT FLOW TO SAID SECOND TRANSISTOR RESPONSIVE TO THE POTENTIAL OF SAID FIRST TRANSISTOR COLLECTOR INCLUDING MEANS CONNECTING SAID FIFTH TRANSISTOR EMITTER TO SAID FIRST TRANSISTOR COLLECTOR, MEANS CONNECTING SAID FIFTH TRANSISTOR COLLECTOR TO SAID SECOND TRANSISTOR BASE, BIAS MEANS, AND MEANS FOR CONNECTING SAID FIFTH TRANSISTOR BASE TO SAID BIAS MEANS, MEANS FOR ESTABLISHING A QUIESCENT CURRENT FOR SAID THIRD AND FOURTH TRANSISTORS, SAID MEANS INCLUDING A SECOND RESISTOR IN SERIES WITH SAID THIRD TRANSISTOR COLLECTOR, A SIXTH TRANSISTOR, SAID SIXTH TRANSISTOR HAVING COLLECTOR, EMITTER AND BASE ELECTRODES, AND BEING OF A TYPE WHICH IS COMPLEMENTARY TO THE TYPES OF SAID THIRD AND FOURTH TRANSISTORS, AND MEANS FOR COUPLING SAID SIXTH TRANSISTOR BETWEEN SAID THIRD TRANSISTOR COLLECTOR AND SAID FOURTH TRANSISTOR BASE TO ESTABLISH CURRENT FLOW THROUGH SAID FOURTH TRANSISTOR RESPONSIVE TO THE POTENTIAL OF SAID THIRD TRANSISTOR COLLECTOR INCLUDING MEANS CONNECTING SAID SIXTH TRANSISTOR EMITTER TO SAID THIRD TRANSISTOR COLLECTOR, MEANS CONNECTING SAID SIXTH TRANSISTOR COLLECTOR TO SAID FOURTH TRANSISTOR BASE, AND MEANS CONNECTING SAID SIXTH TRANSISTOR BASE TO SAID BIAS MEANS, MEANS FOR APPLYING OPERATING POTENTIAL ACROSS SAID FIRST AND SECOND RESISTORS AND THE EMITTERS OF SAID SECOND AND FOURTH TRANSISTORS, AND MEANS TO APPLY SIGNALS FROM SAID SOURCE TO THE BASES OF SAID FIRST AND THIRD TRANSISTORS.