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The input impedance of the amplifier is quite low, and will present a difficult load to the oscillator. Perhaps the oscillator stops oscillating when it's output is connected to the amp.
The input impedance of the amplifier is quite low, and will present a difficult load to the oscillator. Perhaps the oscillator stops oscillating when it's output is connected to the amp.
While experimenting with my new design, which I mentioned uses this little circuit, I was able to obtained an amplified waveform at the output of stage 1. Input was generated from the audacity software, which was distorted as hell, but still served the purpose. Only one thing that is differ from the schematic above is that I used a 1m bias resistor. Transistor used was 2n4401.
And here is the square wave obtained after the 2nd stage. Both bias resistors used were 1Meg ohms. So bias resistor for the 2nd stage must be of 5-10x greater than the load resistor. Although in simulation, it didnt matter. To get a symmetrical square wave, you gonna have to play around with bias resistor value, or go for a better method: schmitt trigger
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