# I am stuck on a problem that only has a center frequency of $\pi/2$ for an IIR filter pole-zero plot of this using 2 poles and 4 zeros [duplicate]

Using a pole zero placement method, design an infinite impulse response band-pass filter with center frequency of $$\pi/2$$ radians per second. Hint: Use two poles and four zeros.

• 1 - What have you tried so far? 2 - What is the effect of a pole on the frequency response? 3 - What is the effect of a zero on the frequency response?
– Ben
Apr 20 '20 at 0:59
• Apr 20 '20 at 1:57
• Welcome to SE.SP! This question looks like a homework question, and the linked-to "duplicate" looks like it will help you answer it. If you have a homework question, we will answer it here, but only if you include your working to date and an attempt to explain why you can't get any further. Please edit your question to add these details and I'll reopen the question.
– Peter K.
Apr 20 '20 at 13:50