J
jhill
I need to generate a TTL level squarewave (duty cycle not important) that is
stable and adjustable at a frequency just slightly different from 3 times
the power-line frequency, for example 180.1 cps. I have tried a simple 555
oscillator using the most stable components I could find, but it still
drifts too much. Is there any circuit I could add to the 555, or build anew
to insure generation a constant small difference in frequency to the
3*60cps.
Can you point me in the right direction?
Can a PLL be used somehow?
TIA
stable and adjustable at a frequency just slightly different from 3 times
the power-line frequency, for example 180.1 cps. I have tried a simple 555
oscillator using the most stable components I could find, but it still
drifts too much. Is there any circuit I could add to the 555, or build anew
to insure generation a constant small difference in frequency to the
3*60cps.
Can you point me in the right direction?
Can a PLL be used somehow?
TIA