Question 3
Marks : +2 | -2
Pass Ratio : 100%
If the phase ϴ(ω) of the system is linear, then the group delay of the system?
Explanation: We know that the group delay of the system with phase ϴ(ω) is defined as
Question 7
Marks : +2 | -2
Pass Ratio : 100%
What is the system function for a two pole band pass filter that has the centre of its pass band at ω=π/2, zero its frequency response characteristic at ω=0 and at ω=π, and its magnitude response is 1/√2 at ω=4π/9?
Explanation: Clearly, the filter must have poles at P1,2=re±jπ/2 and zeros at z=1 and z=-1. Consequently the system function is