The amplifier circuit with macroaxis and low current

Published:2012/9/20 22:00:00 Author:Ecco | Keyword: amplifier , macroaxis, low current | From:SeekIC

Figure A shows the amplifier circuit using a high-output-power and small-distortion complementary transistor. Two diodes can significantly reduce the controlling dead zone. The emitter of two transistors is connected to a strong negative feedback, the dead zone can be further reduced.The circuit shown in Figure b is simpler than the circuit shown in Figure a, and it also uses strong negative feedback to reduce the dead zone.The output stage of circuit shown in Figure c only uses one transistor to form a emitter follower. The transistor current magnification is about 75 times. The op amp maximum current consumption is 20mA to control 1.5A output current.



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