system level design in ADS_

[vivek1214]

can any one suggest me that in system design for RF front architecture which filter is the best choise?
Butterworth or Chebeshev

regards
vivek

 

[peleda]

depends on how many elements you want to use.
chebyshev generally has better cutoff, but requires more elements for synthesis.

 

[vivek1214]

thanks.
can you describe in brief or can you give me some material on it

regards

 

[khouly]

the butterwoth is the very flat : with no ripples so if u need very flat filter and no amplitude variations then butterworth is the filter u need but this will cost u more area coz it will need more stages to get the same attenuation as chebychev

chebychev : gives ripples in the amplitude but with low order

khouly

 

[kspalla]

I think it is better judge by your self by comparing the result from both the cases of two filters.

 

[TerryADS]

I think it depends on your specification.
Butterworth has flat respond,linear phase,but poor rejection.Chebychev has good rejection ,but ripple in passband.

 

[VSWR]

https://en.wikipedia.org/wiki/Chebyshev_filter
https://en.wikipedia.org/wiki/Butterworth_filter

 

[burton]

it is dependent on your requirement. For the same poles,
chebyshev: good selectivity, poor group delay
butterworth: bad selectivity, good group delay