pi filter

[mettula]

Hello, plwease can anyone tell me how to calculate (mathematical  equations) the cutoff frequency of a pi - filter and a T - filter. thanks very much for your help and patience

 

[mettula]

Hello - I need a formula for how to calculate the frequency of a third-order low pass filter containing an inductor and 2 capacitors (pi filter) plz

 

[Kevin Weddle]

I think maybe you would determine the reactance. Resonance will give you better filtering, supposedly. I had resonance give me 20db/decade one time.

 

[audioguru2]

This is a 3rd-order lowpass filter. Its slope is 60dB per decade. If its source impedance and its load impedance are correct then it will have a flat response from DC up to its cutoff frequency.