Pulse-width modulating circuit question - VERY IMPORTANT AND
NEED IMMEDIATE ASSISTANCE! ...  0 pts ended Devices: LM 555
timer, 3 kohm, 3.1 kohm, and3.9 kohm resistors, 20 kohm
potentiometer. I usethese devices to build a PWM circuit but I
need someassistance. The instructions say to connectthe input
clock signal (0 to 4 V, 1600 Hz squarewave from asignal
generator can simulate the TTL output). A 555 timercan also be
used to generate the clock. Next, connect themodulation signal,
Initially use a 1 V pk-pk, 300 Hz sinusoidwith a +2 V offset.
Finally, synchronize theoscilloscope using the input sinusoid.
Adjust thepotentiometer until the width of the PWM pulses its
maximum at thepositive peak of the sinusoid and a minimum at the
negative peak ofthe sinusoid. Please create this circuit on
P-Spice orMultisim or any circuit building software.  My
questions are:  1. How would the PWM waveform look like given
thisinformation. I have to sketch it.  2. If I change the input
analog modulation to atriangular waveform, t