3. Write a function, SqWave which generates a square wave of specified: duty- cy

Question

3. Write a function, SqWave which generates a square wave of specified: duty- cycle, total time for which the wave is generated, and sampling frequency. The function should have the following inputs and outputs: Inputs: Duty-cycle Total time for which the square wave is defined Sampling Frequency Outputs: Square Wave Do NOT use the Matlab function square to accomplish this task. Use the SqWave function to generate a unit amplitude, 440 Hz square-wave, ? 0.1, 0.2, 0.5, that lasts for 2 s. Use a sampling frequency of 44.1 kHz. Play back the tone over your speakers using the sound command. How does the perceived tone change as you vary a?

Explanation / Answer

CODE:

clc;

clear all;

a=input('Enter the amplitude of the square wave A = ');

f= input('Enter the frequency of the square wave F = ');

dc=input('Enter the duty cycle of the wave DC = ');

x=input('Enter starting time period of square wave = ');

y = input('Enter ending time period of square wave = ');

f=f*2*pi;

t=x:.001:y;

y=a*square(f*t,dc);

plot(t,y);

axis([0 1 -2.2 2.2]);

%Program to generate a discrete time square wave

clc;

clear all;

a=input('Enter the amplitude of the square wave A = ');

f= input('Enter the frequency of the square wave F = ');

dc=input('Enter the duty cycle of the wave DC = ');

f=f*2*pi;

t=-10:.01:10;

y=a*square(f*t,dc);

stem(t,y);

axis([0 1 -2.2 2.2]);

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