I have to design and simulate a simple second-order unity-gain Sallen-Key low-pass filter. Specifications are: f_c=10kHz and damping ratio=1 (in order to have no overshot in step-response).
I choose R1=R2 and C1=C2. So I got from equation R1=R2=15kOhm and C1=C2=1nF.
Then I simulated it on Orcad PSpice.
The frequency response seems to be as expected but the step response is totally wrong!!
What am I doing wrong?
Thanks!
I choose R1=R2 and C1=C2. So I got from equation R1=R2=15kOhm and C1=C2=1nF.
Then I simulated it on Orcad PSpice.
The frequency response seems to be as expected but the step response is totally wrong!!
What am I doing wrong?
Thanks!