Reference no: EM13943389
1. The input-output equation characterizing an amplifier that saturates once the input reaches certain values is:
Where x(t) is the input and y(t) the output.
a. Plot the relation between the input x(t) and the output y(t). Is this a linear system? For what range of input values is the system linear, if any?
b. Suppose the input is a sinusoid x(t) = 20 cos(2Πt)u(t), carefully plot x(t) and y(t) for t = -2 to 4.
2. The following op-amp circuit is used to measure the changes of temperature in a system. The output voltage is given by:
Suppose that the temperature in the system changes cyclically after t = 0, so that:
Let the input be Vi(t) = 1 volt.
a. If the switch closes at t0 = 0 msec., plot the output voltage V01(t) for 0≤t≤0.2 sec. in time-intervals of 0.01 sec.
b. If the switch closes at t0 = 50 msec., plot the output voltage V01(t) for 0≤t≤0.2 sec. in time-intervals of 0.01 sec.
3. A zener diode is such that the output corresponding to an input Vs(t) = cos(Πt) is a "clipped" sinusoid
Use MATLAB to generate the input and output signals and plot them in the same plot for 0≤t≤4 at time intervals of 0.001.
a. Is this system linear? Compare the output obtained from Vs(t) with that obtained from 0.3 Vs(t).
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