1. Which circuit converts irregularly shaped waveforms to regular shaped waveforms?
A. Schmitt trigger
B. Voltage limiter
C. Comparator
D. None of the mentioned
2. Determine the upper and lower threshold voltage
A. VUT = +14.63v, VLT= +14.63v
B. VUT = -14.63v, VLT= -14.63v
C. VUT = VLT= ±14.63v
D. None of the mentioned
3. What happens if the threshold voltages are made longer than the noise voltages in the Schmitt trigger?
A. All the mentioned
B. Enhance the output signal
C. Reduce the transition effect
D. Eliminate false output transition
4. To a Schmitt trigger in a non-inverting configuration an input triangular wave of 1Vp is applied. What will be the output waveform, if the upper and lower threshold voltages are 0.25v?
A. Square waveform
B. Pulse waveform
C. Sawtooth waveform
D. Cannot be determined
5. In which configuration a dead band condition occurs in Schmitt trigger
A. Differential amplifier with positive feedback
B. Voltage follower with positive feedback
C. Comparator with positive feedback
D. None of the mentioned
6. Calculate the hysteresis voltage for the schmitt trigger from the given specification:
R2 =56kΩ , R1 = 100Ω ,Vref = 0v & Vsat = ±14v.
A. 0 mv
B. 25 mv
C. 50 mv
D. -25 mv
7. How to limit the output voltage swing only to a positive direction?
A. Combination of two Zener diodes
B. Combination of Zener and rectifier diode
C. All of the mentioned
D. Combination of two rectifier diodes
8. A basic op-amp circuit has a Zener and rectifier diode connected in the feedback path. Calculate the maximum positive voltage. Where, Zener voltage = 5.1 v and voltage drop across the forward-biased Zener = 0.7v?
A. VO = 5.8v
B. VO = 9.9v
C. VO = 4.7v
D. VO = 7.1v
9. The specially designed comparators are compatible with
A. RTL
B. MOS Logic
C. TTL
D. All of the mentioned
10. Response time of comparators is defined as
A. Time interval between input and output crossing upper threshold voltage
B. Time interval between input and output function
C. Time interval between input and output crossing threshold logic
D. Time interval between input and output crossing lower threshold voltage