scdoro
Member level 5
Hi all,
Can someone help me with this design question, i have worked out the steps to do the problem.
Can someone help me scanned through it and see if i missed out anything.
Qn) what should be the reasonable value which i should choose for 'fp in "step 2"?
steps:
1) Required to find the prototype lowpass cutoff frequency for 'fp and 'fs.
*2) Choose a reasonable value for 'fp
3) Obtain alpha1 and alpha2 by substituting 'fp,Wup,wlp values into the four equations
4) Now, we can obtain 'fs since alpha1,alpha2,Wus,wls values are found and given
5) Compute the analog butterworth lowpass prototype specification
6) Design Analog butterworth lowpass filter
7) Perform billinear transformation to obtain digital lowpass butterworth filter
7) Transform digital lowpass to bandstop using the frequency band transformation
thanks
regards
scdoro[/u]
Can someone help me with this design question, i have worked out the steps to do the problem.
Can someone help me scanned through it and see if i missed out anything.
Qn) what should be the reasonable value which i should choose for 'fp in "step 2"?
steps:
1) Required to find the prototype lowpass cutoff frequency for 'fp and 'fs.
*2) Choose a reasonable value for 'fp
3) Obtain alpha1 and alpha2 by substituting 'fp,Wup,wlp values into the four equations
4) Now, we can obtain 'fs since alpha1,alpha2,Wus,wls values are found and given
5) Compute the analog butterworth lowpass prototype specification
6) Design Analog butterworth lowpass filter
7) Perform billinear transformation to obtain digital lowpass butterworth filter
7) Transform digital lowpass to bandstop using the frequency band transformation
thanks
regards
scdoro[/u]