# Oscilator help

1. Feb 18, 2010

hi guys,

can someone tell me the capacitance and inductance for a 1 MHz resonator/oscillator

thanks,

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2. Feb 18, 2010

### Okefenokee

http://en.wikipedia.org/wiki/RLC_circuit" [Broken] It's under resonance frequency.

Last edited by a moderator: May 4, 2017
3. Feb 18, 2010

### Mike_In_Plano

You'll have to start with an assumption. Assume one of the following three, and you can solve for the others:

C
L
X of C and L

At resonance, Xc = XL = 2*pi*f*L = 1/2*pi*f*C

4. Feb 18, 2010

### vk6kro

You could try these:

16 uH....... 1592 pF

24 uH ....... 1061 pF

32 uH ...... 796 pF

https://www.physicsforums.com/attachment.php?attachmentid=18761&d=1241430510

I set the reactance to about 200 ohms and let the program work out suitable L and C values.
Watch the units.

Then the hard part is finding suitable inductors. The ferrite rod antenna in transistor radios resonates at 1 MHz with about 200 pF.

5. Feb 18, 2010

### Staff: Mentor

Welcome to the PF, Ask. What'cha making?