butterworth low filter

Thread Starter

vead

Joined Nov 24, 2011
629
butterworth low filter

specification

passband cut off frequency
stopband- cut off frequency
passband ripple
stopband attenuation
sampling frequency


how to identify by the given specification that its low pass, high pass,band pass or band stop filter
 

PRS

Joined Aug 24, 2008
989
butterworth low filter

specification

passband cut off frequency
stopband- cut off frequency
passband ripple
stopband attenuation
sampling frequency


how to identify by the given specification that its low pass, high pass,band pass or band stop filter
I'm not sure I understand your question. Are you asking for a definition of these terms? Butterworth data tables are usually accompanied by a schematic. If you could post one then ask a question about it there are plenty of people here who will help you.
 

WBahn

Joined Mar 31, 2012
29,979
butterworth low filter

specification

passband cut off frequency
stopband- cut off frequency
passband ripple
stopband attenuation
sampling frequency


how to identify by the given specification that its low pass, high pass,band pass or band stop filter
Uh... butterworth low filter might give a hint.
 

Thread Starter

vead

Joined Nov 24, 2011
629
butterworth digital filter
passband-0-500 hz
stopband-2-4 khz
passband ripple-3 db
stopband attenuation-20 db
sampling frequency-8 khz

how to identify by the given specification that its low pass, high pass,band pass or band stop filter
 

WBahn

Joined Mar 31, 2012
29,979
If it isn't glaringly obvious to you, perhaps you should go back and reread what each filter type means and then review what each of the specifications means.
 

Thread Starter

vead

Joined Nov 24, 2011
629
Fp = passband cut off frequency
Fs= stopband cut off frequency

case I - low pass filter

Fp<Fs

case II - high pass filter

Fs<Fp

case III - band pass filter

Fs1<Fp1 , Fp2<Fs2

case IV band stop filter

Fp1<Fs1 , Fs2< Fp2

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butterworth digital filter
passband-0-500 hz
stopband-2-4 khz
passband ripple-3 db
stopband attenuation-20 db
sampling frequency-8 khz
It will be low pass filter because Fp<Fs 500Hz<4khz
 

Thread Starter

vead

Joined Nov 24, 2011
629
Fp = passband cut off frequency
Fs= stopband cut off frequency

case I - low pass filter

Fp<Fs

case II - high pass filter

Fs<Fp

case III - band pass filter

Fs1<Fp1 , Fp2<Fs2

case IV band stop filter

Fp1<Fs1 , Fs2< Fp2



It will be low pass filter because Fp<Fs 500Hz<4khz
check out this work
 

WBahn

Joined Mar 31, 2012
29,979
If I tell you that a filter has a pass band that ranges from 0 Hz to 1000 Hz, do I really need to tell you anything else for you to determine what type of filter it is?
 

Thread Starter

vead

Joined Nov 24, 2011
629
If I tell you that a filter has a pass bstod that ranges from 0 Hz to 1000 Hz, do I really need to tell you anything else for you to determine what type of filter it is?
I think I need stop band frequency
 

WBahn

Joined Mar 31, 2012
29,979
So, give me an EXAMPLE of an Fs for a filter whose pass band is 0 Hz to 1000 Hz that would make it either a high pass filter or a low pass filter. Start thinking and stop being an equation monkey.
 
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