4. (10 points) An ideal low pass filter H(s) with zero phase and magnitude response. |H...

  

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4. (10 points) An ideal low pass filter H(s) with zero phase and magnitude response. |H (j)= 1 - 45 /4 0 otherwise Find the impulse response h(t) of the low-pass filter. Plot it and indicate whether this filter is causal system or not. (6 points) If = 100 radial (fo-50Hz) represent the spectrum of the sign 4. (10 points) An ideal low pass filter H(s) with zero phase and magnitude response. |H (j)= 1 - 45 /4 0 otherwise Find the impulse response h(t) of the low-pass filter. Plot it and indicate whether this filter is causal system or not. (6 points) If = 100 radial (fo-50Hz) represent the spectrum of the sign