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Digital Electronics - Digital Design

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Exercise

"I never see what has been done; I only see what remains to be done."
- Marie Curie
1. 

The ________ circuit overcomes the problem of switching caused by jitter on the inputs.
A. astable multivibrator
B. monostable multivibrator
C. bistable multivibrator
D. Schmitt trigger
2. 

Why would a delay gate be needed for a digital circuit?
A. A delay gate is never needed.
B. to provide for setup times
C. to provide for hold times
D. to provide for setup times and hold times
3. 

An optocoupler is an integrated circuit with an LED and a zener diode encased in the same package.
A. TrueB. False
4. 

A Schmitt trigger has VT+ = 2.0 V and VT– = 1.2 V. What is the hysteresis voltage of the Schmitt trigger?
A. 0.4 volt
B. 0.6 volt
C. 0.8 volt
D. 1.2 volts
5. 

Which of the following circuit parameters would be most likely to limit the maximum operating frequency of a flip-flop?
A. setup and hold time
B. clock pulse HIGH and LOW time
C. propagation delay time
D. clock transition time

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