Electronics - Flip-Flops and Timers

Exercise :: Flip-Flops and Timers - Filling the Blanks

1. 

A retriggerable one-shot has a pulse width of 10 ms; 3 ms after being triggered, another trigger pulse is applied. The resulting output pulse will be _________ ms.

A. 3
B. 7
C. 10
D. 13

Answer: Option D

Explanation:

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2. 

The S-R, D-type, and J-K flip-flops are all examples of _________________.

A. astable multivibrators
B. bistable multivibrators
C. monostable multivibrators
D. tristable multivibrators

Answer: Option B

Explanation:

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3. 

Edge-triggered flip-flops must have _________.

A. very fast response times
B. at least two inputs to handle rising and falling edges
C. a positive-transition pulse generator
D. a negative-transition pulse generator

Answer: Option C

Explanation:

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4. 

An S-R flip-flop can be triggered by ______, ______, or ________.

A. HIGHs, LOWs, PRESETs
B. edges, levels, pulses
C. HIGHs, LOWs, CLEARs
D. SETs, RESETs, HIGHs

Answer: Option B

Explanation:

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5. 

An S-R NAND latch with both of its inputs LOW has an output that is _____________.

A. unpredictable
B. floating
C. HIGH
D. LOW

Answer: Option A

Explanation:

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