Exercise: Digital Electronics

Questions for: Digital Electronics

Assertion (A): Synchronous counter has higher speed of operation than ripple counter

Reason (R): Synchronous counter uses high speed flip flops.

A:
Both A and R are correct and R is correct explanation of A
B:
Both A and R are correct but R is not correct explanation of A
C:
A is true, R is false
D:
A is false, R is true
Answer: C

Higher speed is due-to the reason that clock pulses in synchronous counter are applied simultaneously to all the flip-flops.

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Assertion (A): ECL is fast as compared to TTL.

Reason (R): ECL dissipates less power than TTL.

A:
Both A and R are correct and R is correct explanation of A
B:
Both A and R are correct but R is not correct explanation of A
C:
A is true, R is false
D:
A is false, R is true
Answer: C

ECL dissipates more power than TTL.

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The applications of shift registers are
  1. Time delay
  2. Ring counter
  3. Serial to parallel data conversion
  4. Serial to serial data conversion
Which of the above are correct?
A:
1, 2, 3
B:
2, 3, 4
C:
1, 2, 3, 4
D:
1, 2, 4
Answer: C

Shift registers are used for all these applications.

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The number of switching functions of 3 variables are
A:
3
B:
8
C:
16
D:
32
Answer: B

23 = 8.

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In the given figure, the flip flop is
A:
negative edge triggered
B:
positive edge triggered
C:
level triggered
D:
either (a) or (c)
Answer: A

The small circle indicates negative and small triangle indicates edge triggering.

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