Audio-frequency generator circuit

Posted on Mar 28, 2007

An audio frequency signal generator shown in FIG. Can output audio signal, 465kHz spectral amplitude signals, 52,5Hz4-16Q5kHz high frequency amplitude modulated signal. VT1 hig

Audio-frequency generator circuit
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h-frequency oscillator and the like, the vibration frequency of oscillation by the G, L. Decision. Manifold musical tone generated by the pilot signal on the one hand from the receptacle XS output, on the other hand by the R, c1 to modulate the high frequency signal to produce AM waves. Potential RP is used to adjust the size of the audio output signal., The high -frequency signal from the magnetic antenna direct radiation output by changing to adjust the distance and the relative position signal generator and a receiver the size of the output signal. Magnetic antenna in the magnet forward Wl wound 70 turns, W2 around 20 turns. G is a tuning capacitor, change C3 should be able to cover 460kHz-1610kHz, or can increase or decrease the number of turns Wl achieved. Yan is the bias resistor, adjust Ningbo, make VT1 collector current of 0.8 ~ 1. 2mA can.

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