Question 1
Marks : +2 | -2
Pass Ratio : 100%
Which of the following is the backward design equation for a low pass-to-low pass transformation?
Explanation: If Ωu is the desired pass band edge frequency of new low pass filter, then the transfer function of this new low pass filter is obtained by using the transformation s → s / Ωu. If ΩS and Ω’S are the stop band frequencies of prototype and transformed filters respectively, then the backward design equation is given by
Question 2
Marks : +2 | -2
Pass Ratio : 100%
Which of the following is the backward design equation for a low pass-to-high pass transformation?
Explanation: If Ωu is the desired pass band edge frequency of new high pass filter, then the transfer function of this new high pass filter is obtained by using the transformation s→Ωu/s. If ΩS and Ω’S are the stop band frequencies of prototype and transformed filters respectively, then the backward design equation is given by
Question 7
Marks : +2 | -2
Pass Ratio : 100%
If A=\\(\\frac{-Ω_1^2+Ω_u Ω_l}{Ω_1 (Ω_u-Ω_l)}\\) and B=\\(\\frac{Ω_2^2-Ω_u Ω_l}{Ω_2 (Ω_u-Ω_l)}\\), then which of the following is the backward design equation for a low pass-to-band pass transformation?
Explanation: If Ωu and Ωl are the upper and lower cutoff pass band frequencies of the desired band pass filter and Ω1 and Ω2 are the lower and upper cutoff stop band frequencies of the desired band pass filter, then the backward design equation is
Question 8
Marks : +2 | -2
Pass Ratio : 100%
Which of the following is a low pass-to-band pass transformation?
Explanation: If Ωu and Ωl are the upper and lower cutoff pass band frequencies of the desired band pass filter, then the transformation to be performed on the normalized low pass filter is