If H(s)= ( frac{1}{s^2+s+1} ) represent the transfer function of a low pass filter (not Butterworth) with a pass band of 1 rad/sec, then what is the system function of a stop band filter with a stop band of 2 rad/sec and a center frequency of 10 rad/sec?

( frac{(s^2+10)^2}{s^4+2s^3+204s^2+200s+10^4} )

( frac{(s^2+100)^2}{s^4+2s^3+204s^2+200s+10^4} )

( frac{(s^2+10)^2}{s^4+2s^3+204s^2+200s+10^4} )

( frac{(s^2+10)^2}{s^4+2s^3+400s^2+200s+10^4} )

If H(s)= ( frac{1}{s^2+s+1} ) represent the transfer function of a low

1.	If H(s)= ( frac{1}{s^2+s+1} ) represent the transfer function of a low pass filter (not Butterworth) with a pass band of 1 rad/sec, then what is the system function of a stop band filter with a stop band of 2 rad/sec and a center frequency of 10 rad/sec?
A.	( frac{(s^2+100)^2}{s^4+2s^3+204s^2+200s+10^4} )
B.	( frac{(s^2+10)^2}{s^4+2s^3+204s^2+200s+10^4} )
C.	( frac{(s^2+10)^2}{s^4+2s^3+400s^2+200s+10^4} )
D.	None of the mentioned
Answer» B. ( frac{(s^2+10)^2}{s^4+2s^3+204s^2+200s+10^4} )

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If H(s)= ( frac{1}{s^2+s+1} ) represent the transfer function of a low pass filter (not Butterworth) with a pass band of 1 rad/sec, then what is the system function of a stop band filter with a stop band of 2 rad/sec and a center frequency of 10 rad/sec?

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