Re: DCO/VCO Fine clock output?

Ignore my last post. I accidentally clicked "Send" before I was
through editing.
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Use an op-amp. With +/- supplies:
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Feedback resistor R1 from output to Inv Input.
Shunt resistor R2 from Inv input to gnd.
Positive feedback R3 from output to Non Inv Input.
Capacitor from Non Inv Input to ground.
Let Vsat = op amp saturated output voltage.
Let Vref = voltage at Inv input with op amp saturated.
Then Vref = VsatR2/(R1+R2)
Let Vs = Vsat + Vref.
Let Tau = R3C
Let f = frequency of oscillation.
f = -1/{2 Tau ln[(Vs-V)/Vs)]}
Where ln(X) means "natural logarithm of X".
If the +/- saturation voltages are equal, the ouput frequency will be
independent of the supply voltage.
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A pot can be substituded for any of the resistors.
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Ignore my last post. I accidentally clicked "Send" before I was
through editing.
Regards,
Jon

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