what is the formula for RC oscillator

welove8051 · Apr 5, 2014

hello all, what is the formula to find the frequency generated for the following RC oscillator circuit.
for r=10k and for c= 470nf i got a frequency of 152hz.

thanks in advance

D.A.(Tony)Stewart · Apr 5, 2014

In your case F= 0.714/RC within reasonable limits for R & C

mjd83 · Apr 5, 2014

1/(2*pi*root(LC))

welove8051 · Apr 10, 2014

SunnySkyguy said:
In your case F= 0.714/RC within reasonable limits for R & C

can you provide the link for the formula derivation.

thanks

mjd83 · Apr 10, 2014

I don't have a link at the moment, it's just a formula I've remembered over the years. It has a catchy tune if you sing it. Lol
1 over 2 pi root L C equals the resonant frequency.

Enjoy.

Btw. I'll try and dereive it from first principles later on for you.

D.A.(Tony)Stewart · Apr 10, 2014

eh MJ, I never hear that tune but it rhymes,
but looking at the schematic , where the L is the it?

what is the formula for RC oscillator

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what is the formula for RC oscillator

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