# Finding resonant frequency question

Discussion in 'Homework Help' started by The_Cook, May 30, 2014.

1. ### The_Cook Thread Starter Member

May 29, 2014
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Does anyone know how to find the resonant frequency for the attached circuit in terms of C's and L's?

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Feb 19, 2010
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May 29, 2014
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4. ### DerStrom8 Well-Known Member

Feb 20, 2011
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This sounds an awful lot like a homework question. Why don't you attempt it yourself first, and then we can look at it and see what you might need touching up on?

Regards,
Matt

5. ### The_Cook Thread Starter Member

May 29, 2014
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Hey Matt, we never went over this in class and I couldn't find any example in our book, or online. So could you tell me how to derive it, I have no idea where to start with this. And I am also confused how the small signal circuit is supposed to help me with the question either.

Feb 17, 2009
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May 29, 2014
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8. ### shteii01 AAC Fanatic!

Feb 19, 2010
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That is the point of the homework. You have the start and you have the end, it is your job to connect the two.

From googling, Clapp Oscillator is a Colpitts type oscillator.

9. ### The_Cook Thread Starter Member

May 29, 2014
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Yeah I can't figure out how to make that connection. Could you tell me how to?

10. ### Jony130 AAC Fanatic!

Feb 17, 2009
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Here you have. Now all you need to do is to w rite the transfer function for feedback and solve for ωo to make the imaginary part of the denominator = 0

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11. ### The_Cook Thread Starter Member

May 29, 2014
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Is there an example I could look at to see the steps to find the resonant frequency

Feb 17, 2009
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