Hi everyone
I was hoping on some help to a project I have done this semester.
The circuit is actually done and working but there are some minor complications.
I have uploaded a picture of the part in the circuit which I'm curious about (It's a lowpass filter with cutoff frequency 500Hz) along with the LTSpice file.
So in my stopband there are some ripples that i cant explain. They seem to be there in my HP filter also, but much less (that is also only a 3rd order). Along with that, when I test the filter, it has a cutoff-freq at 500Hz damped by 4.5dB, and the HP is at its normal 3dB (Both are at 3dB in the simulation).
Hope you can help.
I was hoping on some help to a project I have done this semester.
The circuit is actually done and working but there are some minor complications.
I have uploaded a picture of the part in the circuit which I'm curious about (It's a lowpass filter with cutoff frequency 500Hz) along with the LTSpice file.
So in my stopband there are some ripples that i cant explain. They seem to be there in my HP filter also, but much less (that is also only a 3rd order). Along with that, when I test the filter, it has a cutoff-freq at 500Hz damped by 4.5dB, and the HP is at its normal 3dB (Both are at 3dB in the simulation).
Hope you can help.
Attachments
-
154.9 KB Views: 21
-
3.1 KB Views: 7