WorksheetsComparators and Schmitt Triggers Quiz
Total questions: 15
Worksheet time: 8mins
The output of a Schmitt trigger is a
pulse waveform.
sawtooth waveform.
sinusoidal waveform.
triangle waveform.
A Schmitt trigger is
a comparator with only one trigger point.
a comparator with hysteresis.
a comparator with three trigger points.
none of the above.
A good example of hysteresis is a(n)
AM radio.
thermostat.
alarm clock.
walkie talkie
A comparator with hysteresis is sometimes known as a(n)
integrator.
differentiator.
Schmitt trigger.
window detector
What is (are) the necessary component(s) for the design of a bounded comparator?
rectifier diodes
zener diodes
Schottky diode
BiFET
What type(s) of circuit(s) use comparators?
summer
nonzero-level detector
averaging amplifier
summer and nonzero-level detector
Refer to the figure below. Determine the lower trigger point.
+V(out)max
-V(out)max
-2.47 V
+2.47 V
Refer to the figure below. Determine the upper trigger point.
+V(out)max
-V(out)max
-2.47 V
+2.47 V
In a zero-level detector, the output changes state when the input
is positive
is negative
crosses zero
has a zero rate of change
Noise on the input of a comparator can cause the output to
hang up in one state
go to zero
change back and forth erratically between two states
produce the amplified noise signal
The effects of noise can be reduced by
lowering the supply voltage
using positive feedback
using negative feedback
using hysteresis
using both positive feedback and hysteresis
A comparator with hysteresis
has one trigger point
has two trigger points
has a variable trigger point
has zero noise
In a comparator with hysteresis,
a bias voltage is applied between the two inputs
only one supply voltage is used
a portion of the output is fed back to the inverting input
a portion of the output is fed back to the noninverting input
Using output bounding in a comparator
makes it faster
keeps the output positive
limits the output levels
stabilizes the output
In a comparator circuit, what is the effect of increasing the hysteresis?
It has no effect on the output.
It increases the sensitivity of the comparator.
It decreases the likelihood of output oscillation due to noise.
It makes the circuit slower.
