Square-Wave Oscillator

Posted on Jun 6, 2012

The NE555 is connected in the astable mode and uses only three timing components (RA, RB, and Ct. A 0.01-/aF bypass

Square-Wave Oscillator
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capacitor is used on pin 5 for noise immunity. The operating restrictions of the a-stable mode are few. The upper frequency limit is about 100 kHz for reliable operation, as a result of internal storage times. Theoretically, it has no lower frequency limit, only that which is imposed by Rt and Ct limitations.

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