FIELD: electrical engineering. SUBSTANCE: standard resistor 1 is inserted in emitter circuit of transistors 14, 15, d.c. amplifier is made in the form of differential amplifier 8 whose inputs are connected to two sides of transistors 14,15 and regulating component 3 is built around two transistors 4,5 of different type of conductivity with limiting resistors 6,7 inserted in collector and emitter circuits. EFFECT: improved design. 1 dwg
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