Value of the RFC in a bias circuit.

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santom

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rfc coil construction

hi all,
I am not able to understand as how to calculate the value of the RFC in a biasing circuit.I know the operation and also the purpose of the RFC..
I read it in some other posts here where they said we have to take 10 times the input impedance.

Can anyone throw light on that?
 

Generally there is a rule of thumb that the impedance of the RFC is at least ten times higher than the impedance can be seen from this node without RFC.

But i prefer to choose as large as i can.

The impedance of an inductance is jwL. Take wL ten times larger than the input impedance.
 

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