12.
The duration of the sweep presentation on the screen of an
oscilloscope is controlled by the
a.
gate voltage.
b.
sweep trigger.
c.
duration of the information signal.
d.
frequency of the information signal.
13.
Assume that the nonsinusoidal voltage shown in B of Figure 44
(page 86) is applied to a filter circuit. The filter's high
during the time period between
a.
0 and 10 microseconds.
b.
10 and 40 microseconds.
c.
20 and 50 microseconds.
d.
40 and 60 microseconds.
14.
Which circuits can be eliminated in the timer shown in Figure 12
if the crystalcontrolled master oscillator is replaced by a
a.
Limiter and clipper.
b.
Cathode follower and peaker.
c.
Overdriven amplifier and peaker.
d.
Limiter and overdriven amplifier.
15.
To obtain precise timing of electronic components, the square
waves produced in timing circuits must be converted into
triggers. What type of circuit converts square waves into
triggers?
a.
Peaker.
b.
Limiter.
c.
Clipper.
d.
Cathode follower.
28
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