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The sine wave oscillator using LM386

2016-08-22 19:45  
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The chart shows the sinusoidal oscillator circuit using LM386; the circuit uses the Wien bridge oscillator method, and the distortion factor of output signal of is very low. Small bulb H and resistor R3 form the negative feedback circuit, which makes sure that the signal amplitude output by oscillator is stable and has low distortion. When the capacitors C1, C2 values ​​are the same , and they use the icon data, the sinusoidal frequency is 1KHz. When it is in actual production , H can select 3V, 15mA small bulb.