CIRCUIT ARRANGEMENT FOR LOAD-PROPORTIONAL ADJUSTMENT OF THE DRIVE CURRENT OF A SINGLE-STAGE TRANSMITTER TRANSISTOR AMPLIFIER OPERATED IN EMITTER CIRCUIT

摘要

Circuit for the load-proportional adjustment of the driving current of a single-ended output transistor of a transistor amplifier for a variable load of the output transistor, the output transistor having a base-emitter voltage and being operated in a common emitter circuit, having a control branch feeding the driving current to the output transistor, including a sensing transistor stage having an output circuit and being driven by the base-emitter voltage of the output transistor, a transistor serving as a driver transistor for the output transistor and being controlled by the control branch, and a coupling circuit through which current in the output circuit of the sensing transistor is feedable to the transistor serving as a driver transistor.