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NEED TO DESIGN A LOW P ASS FILTER

Started by itsmedevi_86 November 28, 2007
I need to design a low pass filter with cut-off frequency 150Hz.since
my algorithm involves finding the difference between the energy of the
signal before and after passing through the filter ,I need the filter
to have very high efficiency.

I found ellip - 4th order to have good performance.But i need a better
one.
Could anyone suggest me a better filter type.

waiting for reply

Thanks and Regards,
Mahadevi
>
>I need to design a low pass filter with cut-off frequency 150Hz.since
>my algorithm involves finding the difference between the energy of the
>signal before and after passing through the filter ,I need the filter
>to have very high efficiency.
>
>I found ellip - 4th order to have good performance.But i need a better
>one.
>Could anyone suggest me a better filter type.
>
>waiting for reply
>
>Thanks and Regards,
>Mahadevi
>
hi, i hope this quite helpful...
i have done design a LPF, i'm using least square type...it's easy, just have to calculate the magnitude and normalised freq...