The high voltage input FET power amplifier circuit diagram

Published:2011/6/10 22:01:00 Author:leo | Keyword: The high voltage input FET power amplifier circuit diagram, 2SA639, 2SC1279, 2SA818, 2SA633, 2SC1628 | From:SeekIC

As the picture 1 shows, it is a high voltage input power amplifier circuit. The input VT1 of the circuit adopts FET tube. And its drain is connected to common base amplifier formed by VT2 and VT3, which is used to electric level move in order to prevent high voltage from being connecting to the drain of VT1. VT5 and VT6 are differential amplifying circuit.When the emitter is connect is added the current feedback, convert rate will be improved. Feedback resistance value of RE1 and RE2 need to be 0 to 5OOΩ. VT4 should be connected to be a diode which is used to make up the difference of UBE of VT5 and VT^ causing by temperature changes. VT8 and VT9 are push-pull output circuit.



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