The input of the band pass filter is 30Khz triangular wave of 1Vpp. I want the band pass filter to allow 27k-33k Hz . I have used these values based on the formulas I found online for this band pass filter.
Unfortunately the problem seems to be , that at high frequencies eg. 60kHz it does not cut them off and the second problem that it reduces the 1Vpp to 500mV Vpp which I don't want either.
And this is with 60kHz input (same colours)
To me it seems they are the same, which is bad. What I am doing wrong , which values should I use
ps. the formulas for the values I used are on this site http://www.electronics-tutorials.ws/filter/filter_7.html