Can someone point to some information to design a cascading RC filter. The help I've found sound far seem discuss more complex filters, Bessel etc. I have to design a straight RC filter.

Specs

Vo/Vin (f < 2KHz) ˜0dB

Vo/Vin (f = 20KHz) ˜–3dB

and
Vo/Vin (f = 200KHz) < – 15dB

 

In other words you need (approximately) a band pass filter with cutoff frequencies off 20Hz and 20KHz?

 

Well, I was thinking more lowpass, that dropped off at 2KHz at 3 dB/decade, then at 20KHz dropped off again at 12dB/decade, to get me to -15dB at 200KHz. Is it unrealistic for the filter to go down to dc, if so 20 hz is fine.
Thanks for the help.