Audio frequency therapeutic apparatus circuit

Published:2011/11/9 21:07:00 Author:May | Keyword: Audio frequency, therapeutic apparatus | From:SeekIC

Audio frequency therapeutic apparatus circuit principle is shown in the diagram. It consists of RC oscillator, preamplifier, push-pull power amplifier and the output current indicator, etc. In fact, it is an audio frequency signal generator with high output power. In the diagram, transistors VT1 and VT2and some resistor-capacitor unit, etc make up wien bridge oscillator with goodwaveform and widelow-frequency adjustable range.The double potentiometer RP1 can adjust oscillator frequency. Transistors VT3 and VT4 make up the series push-pull amplifier of non output transformer. VT3 and VT4are two transistors with the same polarity, and theyuse series type, and two bases of the transistor areseparately connectedto the collector and emitter of VT2 in order to get oposite phase signal, thereby lt makes VT3 and VT4's bases add to the same amplitude, phase and oposite oscillator signal.



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