HIGH-POWER OPERATIONAL AMPLIFIER Russian patent published in 1997 - IPC

FIELD: microelectronics; control circuits of motors, audio amplifiers, and measuring instruments. SUBSTANCE: amplifier has input stage 1, bias circuit 2, current limiter 3, output push-pull stage using n-p-n and p-n-p transistors connected into Darlington circuit, respectively, first and second current-limiting resistors 6, 7; in addition, it is provided with first through fourth p-n-p transistors 8-11, first, second, and third n-p-n transistors 12-14, first, second, and diodes 15-17, and third through eleventh resistors 18-27. EFFECT: improved reliability. 2 dwg