#### greenjuice

##### Member level 1

There are series and parallel RLC band pass fillter, as you know.

In series RLC band pass fillter, as frequency gets bigger, size of inductor's and

capacitor's impedance are same but their polarity is different at special point.

That special point is center frequency

because sum of inductor's and capacitor's impedance is zero. so

resistance have all input voltage.

But I don't know why parallel RLC band pass fillter has center frequency at point

at which size of inductor's and capacitor's impedance are same.

Please explain why this happen conceptually.

Thank you

In series RLC band pass fillter, as frequency gets bigger, size of inductor's and

capacitor's impedance are same but their polarity is different at special point.

That special point is center frequency

because sum of inductor's and capacitor's impedance is zero. so

resistance have all input voltage.

But I don't know why parallel RLC band pass fillter has center frequency at point

at which size of inductor's and capacitor's impedance are same.

Please explain why this happen conceptually.

Thank you