Transistor amplifier temperature stabilization circuits

Claim 1

A SERVO AMPLIFIER CIRCUIT STABILIZED AGAINST TEMPERATURE EFFECTS COMPRISING (A) AN INPUT TRANSFORMER HAVING A CENTER-TAPPED SECONDARY WITH THE CENTER TAP THEREOF RESISTIVELY CONNECTED TO GROUND, (B) FIRST AND SECOND PREAMPLIFIER TRANSISTORS OF A FIRST CONDUCTIVITY TYPE HAVING THE BASE ELECTRODES THEREOF DIRECTLY COUPLED TO RESPECTIVE ENDS OF THE SECONDARY OF SAID INPUT TRANSFORMER, (C) FIRST AND SECOND AMPLIFIER TRANSISTORS OF A SECOND CONDUCTIVITY TYPE OPPOSITE SAID FIRST CONDUCTIVITY TYPE AND HAVING THE BASE ELECTRODES THEREOF DIRECTLY COUPLED TO RESPECTIVE COLLECTOR ELECTRODES OF SAID PREAMPLIFIER TRANSISTORS, (D) FIRST AND SECOND CIRCUIT POINTS, (E) FIRST AND SECOND RESISTIVE ELEMENTS R CONNECTED (1) ON ONE SIDE TO THE BASE ELECTRODES OF SAID FIRST AND SECOND AMPLIFIER TRANSISTORS RESPECTIVELY AND (2) ON THE OTHER SIDE TO SAID FIRST AND SECOND CIRCUIT POINTS RESPECTIVELY, (F) FIRST AND SECOND STABISTOR ELEMENTS S CONNECTED (1) ON ONE SIDE TO THE EMITTER ELECTRODES OF SAID FIRST AND SECOND AMPLIFIER TRANSISTORS RESPECTIVELY AND (2) ON THE OTHER SIDE TO SAID FIRST AND SECOND CIRCUIT POINTS RESPECTIVELY, (G) THIRD AND FOURTH AMPLIFIER TRANSISTORS OF THE SECOND CONDUCTIVITY TYPE AND HAVING THE BASE ELECTRODES THEREOF DIRECTLY COUPLED TO SAID FIRST AND SECOND CIRCUIT POINTS RESPECTIVELY, (H) A THIRD CIRCUIT POINT, (I) THIRD AND FOURTH RESISTIVE ELEMENTS R (1) CONNECTED ON ONE SIDE TO SAID FIRST AND SECOND CIRCUIT POINTS RESPECTIVELY AND (2) COMMONLY CONNECTED TO SAID THIRD CIRCUIT POINT ON THE OTHER SIDE, (J) A THIRD STABISTOR ELEMENT S (1) CONNECTED TO SAID THIRD CIRCUIT POINT ON ONE SIDE AND (2) COMMONLY CONNECTED TO THE EMITTER ELECTRODES OF SAID THIRD AND FOURTH AMPLIFIER TRANSISTORS, (K) PUSH-PULL OUTPUT CIRCUIT MEANS COUPLED ON ONE SIDE TO THE COLLECTOR ELECTRODES OF SAID FIRST AND THIRD AMPLIFIER TRANSISTORS AND ON THE OTHER SIDE TO THE COLLECTOR ELECTRODES OF SAID SECOND AND FOURTH AMPLIFIER TRANSISTORS FOR RECEIVING DRIVING POWER THEREFROM, (L) A PAIR OF CURRENT FEEDBACK CONNECTIONS COUPLED FOR COMPLETING THE RESPECTIVE EMITTER ELECTRODES OF SAID FIRST AND SECOND PREAMPLIFIER TRANSISTORS AND FOR PROVIDING NEGATIVE CURRENT FEEDBACK FROM SAID OUTPUT CIRCUIT MEANS, (M) THE VALUE OF SAID RESISTIVE ELEMENTS R BEING PRESELECTED TO MAINTAIN THE TERM DEFINED BY