Design a delta-modulator for a sinusoidal signal whose frequency is located anywhere in the voice band, [20 Hz, 20 kHz], and A= 1 V. Find a sampling frequency such that SQNR is at least 50 dB and no slope overload distortion is present. Find also the step size. Assume that the reconstruction filter cut-off frequency is 40 kHz. Repeat the same when (i) the maximum frequency is 200 kHz (the reconstruction filter cut-off frequency is 400 kHz), and (ii) A=10 V. Compare the results. What is the effect of signal maximum frequency? Amplitude?