High gain amplifier employing cascaded opposite conductivity field effect transistors

Claim 1

AN AMPLIFIER CIRCUIT INCLUDING IN COMBINATION, A FIELD EFFECT OUTPUT TRANSISTOR HAVING SOURCE, DRAIN AND GATE ELECTRODES, WITH THE SOURCE ELECTRODE CONNECTED TO A REFERENCE POTENTIAL, A FIELD EFFECT INPUT TRANSISTOR HAVING SOURCE, DRAIN AND GATE ELECTRODES, WITH THE SOURCE ELECTRODE CONNECTED TO SAID REFERENCE POTENTIAL, SAID FIELD EFFECT OUTPUT TANSISTOR BEING OPPOSITE IN CONDUCTIVITY FROM SAID FIELD EFFECT INPUT TRANSISTOR, MEANS CONNECTING SAID DRAIN ELECTRODE OF SAID INPUT TRANSISTOR TO SAID GATE ELECTRODE OF SAID OUTPUT TRANSISTOR, HIGH IMPEDANCE INPUT CIRCUIT MEANS CONNECTED TO SAID GATE ELECTRODE OF SAID INPUT TRANSISTOR AND HAVING AN INPUT TERMINAL, CURRENT LIMITING MEANS CONNECTING SAID DRAIN ELECTRODE OF SAID INPUT TRANSISTOR TO A BIAS TERMINAL ADAPTED TO RECEIVE A BIAS POTENTIAL OF ONE POLARITY, AND LOW IMPEDANCE OUTPUT CIRCUIT MEANS CONNECTED TO SAID DRAIN ELECTRODE OF SAID OUTPUT TRANSISTOR AND HAVING AN OUTPUT TERMINAL, SAID AMPLIFIER CIRCUIT OPERATING IN RESPONSE TO AN INPUT SIGNAL AND A BIAS POTENTIAL OF THE POLARITY OPPOSITE TO SAID ONE POLARITY APPLIED TO SAID INPUT TERMINAL AND TO A BIAS POTENTIAL OF SAID ONE POLARITY APPLIED TO SAID OUTPUT TERMINAL TO PROVIDE AN AMPLIFIED SIGNAL IN SAID OUTPUT CIRCUIT MEANS.