Chapter 31: Waveshaping Circuits
MULTIPLE CHOICE
1. According to the frequency domain concept, all periodic waveforms are made up of ____ waves.
a.
sine
c.
rectangular
b.
square
d.
sawtooth
2. ____ waves are important because they are the only waveform that cannot be distorted by RC, RL, or
LC circuits.
a.
Rectangular
c.
Sawtooth
b.
Square
d.
Sine
3. A ____ wave consists of the fundamental frequency with an infinite number of odd harmonics that
cross the zero reference line in phase with the fundamental.
a.
sawtooth
c.
square
b.
sine
d.
rectangular
4. A ____ wave consists of the fundamental frequency plus odd harmonics in-phase and even harmonics
crossing the zero reference line 180 degrees out of phase with the fundamental.
a.
sine
c.
square
b.
sawtooth
d.
rectangular
5. The ____ can be represented as a percentage indicating the amount of time that the pulse exists during
each cycle.
a.
duty cycle
c.
pulse width
b.
period
d.
overshoot
6. A(n) ____ circuit can be used to square off the peaks of an applied signal, obtain a rectangular
waveform from a sine-wave signal, eliminate positive or negative portions of a waveform, or keep an
input amplitude at a constant level.
a.
differentiator
c.
clipping
b.
clamping
d.
integrator
7. A(n) ____ circuit can be used to clamp the top or bottom of the waveform to a given DC voltage.
a.
differentiator
c.
integrator
b.
clipping
d.
clamping
8. The output pulse of a ____ is generally longer than the input pulse; therefore, it is also called a pulse
stretcher.
a.
bistable multivibrator
c.
Schmitt trigger
b.
monostable multivibrator
d.
flip-flop
9. A basic ____ circuit produces a square or rectangular waveform for use in gating or timing signals or
for on-off switching operations in binary counter circuits.
a.
clamping
c.
flip-flop
b.
monostable multivibrator
d.
differentiator
10. Integrated circuit versions of the ____ are perhaps the most important circuits in digital electronics,
used for frequency division, data storage, counting, and data manipulation.
a.
flip-flop
c.
clipping
b.
monostable multivibrator
d.
clamping
COMPLETION
1. The sine wave that has the same frequency as the periodic waveform is called the
____________________.
2. A(n) ____________________ displays waveforms in the frequency domain.
3. A monostable multivibrator is also called a(n) ____________________ multivibrator because it
produces one output pulse for each input pulse.
SHORT ANSWER
1. Describe the three conditions common to high-frequency pulses.
2. Describe the bistable multivibrator.