Digital filter design of tone between 100-1000 Khz frequency?

I want to generate digital filter for a broadband within range of 100-1000 Khz frequency? Any help is appreciated. Thanks

[Mathieu NOE]

hi

I don't get your question

a tone is a sine signal either fixed or variable frequency

a filter is a filter

those are two distinct things

you may want to filter a tone with a digital filter (that's how I would interpret your question)

but 100-1000 Khz frequency is supposed to be the lower / upper corner frequencies of your filter or the frequency range covered by your tone signal ?

we have two objects here (a signal , a filter) and we need the specs of both

Answer 1

[Sai]

Hi,

I understand that you want to design a digital band pass filter with cut off frequencies 100KHz and 1000KHz.

The filter can be either chebyschev (cheby1) or butterworth (butter). It can be designed if the data related to passband, stopband ripples and order of the filter is available.

Steps:

1. Design an analog filter (either chebyschev (cheby1) or butterworth (butter))
2. Convert into digital filter using bilinear transformation

Refer to cheby1 for designing chebyschev analog filter

Refer to butter for designing butterworth analog filter

Refer to bilinear for converting analog filter to digital domain

Refer to buttord for determining the order of the filter