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Stable Sinusoidal Oscillator Circuit Composed of F007

2016-08-01 02:59  
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Stable Sinusoidal Oscillator Circuit Composed of F007
As shown in the figure is a stable sinusoidal oscillator circuit. In order to get a stable oscillation, the gain of the circuit should be 1. If the gain is too large, there will be distortion of the waveform; If gain is too small, the vibration may stop . This circuit uses two diodes to stabilize the oscillations. When the output voltage is too low, the diode will close, and the negative feedback will be cut off. Then the loop gain and the output voltage will increase.When the output goes up to a certain value, the diode will conduct, and the loop gain andoutput voltage will decrease. Repeatedly,the output amplitude will be kept in a certain value. The potentiometer in the figure is to regulate the output amplitude and the degree of distortion. The oscillation frequency of the circuit is determined by resistance R and capacitance C , the formula being : F0 = 1/2π RC.