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A "passive filter" is a Butterworth type or Chebys

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passive filter loss

Attached circuit is a simple passive filter, It's a Butterworth type or a Chebyshev type? or other type?

Could anyone tell me? Could a passive filter be classified to Butterworth or Chebyshev type?
 

Re: A "passive filter" is a Butterworth type or Ch

The type of the filter approximation depends on the component values. Also, load and source resistances influence the characteristic. If source res is 0, than C3 does not influence the filter characteristic.

maranaza
 

Re: A "passive filter" is a Butterworth type or Ch

hi
think the Butterworth and Chebyshev are passive as they use R,L,C and active filters are designed by operational amplifier also the IIR filters an FIR filters.
There are alot of tutorials on the net for that.
bye
emmos
 

Re: A "passive filter" is a Butterworth type or Ch

emmos said:
hi
think the Butterworth and Chebyshev are passive as they use R,L,C and active filters are designed by operational amplifier also the IIR filters an FIR filters.
Click to expand...

nope.

The filter aproximation (Butterworth, Bessel, Chebichev, Cauer, whatever) depicts filter loss in passband and stopband, and you may synthetise them with passive networks, active networks or computational algorithms (digital filters).
 

Re: A "passive filter" is a Butterworth type or Ch

Your circuit uses only two types of components R and C. This will produce poles and zeros only on the real axis of the S plane.

The Butterworth and Chebychev filters have complex poles in the S plane. There is no way to adjust your component values or source and load impedance to get complex poles for your circuit.
 

Re: A "passive filter" is a Butterworth type or Ch

Your filter is tipical low-pass for PLL loop. It is neither Chebyshev or any other standard type of low-pass.
 

3-order passive loop filter for 4-order PLL
 

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