Temperature compensation of transistor amplifiers

Claim 1

AN ELECTRIC AMPLIFIER COMPRISING FIRST AND SECOND ELECTRIC SUPPLY TERMINALS FOR CONNECTION WITH A SOURCE OF DIRECT CURRENT, A FIRST AMPLIFYING CIRCUIT WHICH INCLUDES A FIRST TRANSISTOR OF ONE CONDUCTIVITY TYPE AND HAVING AN EMITTER, A BASE AND A COLLECTOR, A RESISTOR HAVING A NEGATIVE TEMPERATURE COEFFICIENT OF RESISTANCE, THE RESISTOR BEING CONNECTED IN SERIES RELATIONSHIP WITH AND ADJACENT TO THE COLLECTOR OF THE TRANSISTOR, AND AN INPUT CIRCUIT MEANS CONNECTED WITH THE BASE AND EMITTER OF THE TRANSISTOR FOR APPLYING A VOLTAGE SIGNAL BETWEEN THE BASE AND EMITTER, MEANS FOR CONNECTING THE SAID FIRST AMPLIFYING CIRCUIT FOR SUPPLY FROM THE FIRST AND SECOND SUPPLY TERMINALS, THE RESISTOR BEING CONNECTED ELECTRICALLY ADJACENT THE FIRST SUPPLY TERMINAL, A SECOND AMPLIFYING CIRCUIT WHICH INCLUDES A SECOND TRANSISTOR OF THE OPPOSITE CONDUCTIVITY TYPE AND HAVING AN EMITTER, A BASE AND A COLLECTOR, FIRST AND SECOND OUTPUT TERMINALS FOR SUPPLYING AN ELECTRIC LOAD DEVICE WHEREBY THE LOAD DEVICE WHEN CONNECTED TO THESE TERMINALS IS CONNECTED ELECTRICALLY IN SERIES RELATIONSHIP WITH AND ADJACENT TO THE COLLECTOR OF THE SECOND TRANSISTOR, MEANS FOR CONNECTING THE SECOND AMPLIFYING CIRCUIT FOR SUPPLY FROM THE FIRST AND SECOND SUPPLY TERMINALS, THE EMITTER OF THE SECOND TRANSISTOR BEING CONNECTED ELECTRICALLY ADJACENT THE FIRST SUPPLY TERMINAL, AND MEANS FOR APPLYING ACROSS THE BASE AND EMITTER OF THE SECOND TRANSISTOR THE VOLTAGE DEVELOPED ACROSS THE RESISTOR, THE RESISTOR HAVING A RESISTANCE-TEMPERATURE CHARACTERISTIC SUCH AS TO COMPENSATE FOR VARIATIONS IN THE CONDUCTION OF BOTH OF THE TRANSISTORS WITH VARIATION IN THE TEMPERATURE THEREOF.