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ASTABLE_OSCILLATOR

2016-08-17 10:29  
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ASTABLE_OSCILLATOR
Before power is applied, the input and output are at ground potential and capacitor C is discharged. On power-on, the output goes high (VDD) and C charges through R until Vis reached. the output then goes low (VSS). C is now discharged through R until Vn is reached.The output then goes high and charges C towards Vp through R. Thus input A alternately swings between Vp and Vn as the output goes high and low. This circuit is self-starting at power-on.