Exercise: Digital Electronics

Questions for: Digital Electronics

The gates G1 and G2 in the figure have propagation delays of 10 n sec. and 20 n sec. respectively. If the input Vi makes an output change from logic 0 to 1 at time t = t0 then the output wavefrom V0 is
A:
B:
C:
D:
Answer: D

Truth table are as follows.

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The density of dynamic RAM is
A:
the same as static RAM
B:
less than that of static RAM
C:
more than that of static RAM
D:
either equal or less than that of static RAM
Answer: C

Dynamic RAM has higher packing density and requires lesser space.

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A 3 bit up-down counter can count from
A:
000 to 111
B:
111 to 000
C:
000 to 111 and also from 111 to 000
D:
none of the above
Answer: C

Since it is an up-down counter it can count upwards or downwards.

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Assertion (A): A multiplexer can be used for data routing.

Reason (R): A multiplexer has one input and many outputs.

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

Multiplexer has many inputs but one output.

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The function Y = AC + BD + EF is
A:
POS
B:
SOP
C:
Hybrid
D:
none of the above
Answer: B

It is sum of products.

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