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Electronics and Communication Engineering - Digital Electronics

Exercise : Digital Electronics - Section 5
1.
The number of memory locations in which 14 address bits can access is
1024
2048
4096
16384
Answer: Option
Explanation:

214 = 16384.

2.
What will be conversion rate for a counter type A/D converter contains a 4 bit binary ladder and a counter driven by a 2 MHz clock. Then conversion time
125
125 x 103
125 x 106
None
Answer: Option
Explanation:
No answer description is available. Let's discuss.
3.
A 6 bit R-2R ladder D/A converter has a reference voltage of 6.5 V. It meets standard linearity then resolution in percent and volts.
3% 7 V
6.4 V, 2%
0.1%, 1.57 V
1.57%, 0.1 V
Answer: Option
Explanation:

R-2R ladder, resolution =

Resolution in volts = .

4.
What will be output for decimal input 82?
0.82 V
8 V
0.1 V
10 mV
Answer: Option
Explanation:

Output for decimal input 82/(10000010) = 0.01 x 82 = 0.82 V.

5.
The circuit of the given figure gives the output Y =
AB
A + B
A B
A + B
Answer: Option
Explanation:

When any input is High, the corresponding transistor conducts and output is Low. Hence it is a NOR gate.

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