Sqaure Wave Oscillator
Notes:
Using two gates from a CMOS 4011 NAND chip, a simple aquarewave oscillator can
br made. Alternatively a CMOS 4001 chip can also be used,
or a TTL equivalent. In this circuit the mark space ratio can also be
independantly controlled by varying the value of the resistors. The rise
and fall times of the output pulses depend on the operating voltage of the IC
and type of IC, but will be typically in
the order on tens of nanoseconds.
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