mettula Posted April 1, 2007 Report Share Posted April 1, 2007 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 Quote Link to comment Share on other sites More sharing options...
mettula Posted April 3, 2007 Author Report Share Posted April 3, 2007 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 Quote Link to comment Share on other sites More sharing options...
Kevin Weddle Posted April 3, 2007 Report Share Posted April 3, 2007 I think maybe you would determine the reactance. Resonance will give you better filtering, supposedly. I had resonance give me 20db/decade one time. Quote Link to comment Share on other sites More sharing options...
audioguru Posted April 3, 2007 Report Share Posted April 3, 2007 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. Quote Link to comment Share on other sites More sharing options...
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