) Pr. 5.38 (textbook).
An ideal low pass filter H(s) with zero phase and magnitude response:
ì1 -p£W£p
H( jW)=í
î 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.
What is the effect of shifting the central frequency of the ideal filter for 5p ?
)
A 12-bit AD converter is used to digitize signal with negative reference VR- = 0.5V and positive reference VR+ = 2.5V.
What is the quantization step?
What is the output of the AD converter for Vin = 2.2 V ?
) What is the output of the AD converter for Vin = 0.35 V ?
What is the output of the AD converter for Vin = 3.1 V ?
Represent spectrum of the signal 𝑥(𝑡)=8𝑐𝑜𝑠(100𝑡).
Represent magnitude and phase spectrum of the same signal sampled at Fs = 150 rad/s. Describe the effect.
