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Electronics and Communication Engineering - Digital Electronics

Exercise : Digital Electronics - Section 3
36.
A 10 bit ADC with a full scale output voltage of 10.24 V is to be designed to have ± LSB/2 accuracy. If ADC is calibrated at 25°C, the maximum net temperature coefficient of ADC should not exceed
± 200 μV/°C
± 400 μV/°C
± 600 μV/°C
± 800 μV/°C
Answer: Option
Explanation:

, accuracy = 5 mV, temp, .

37.
If all the LEDs in a seven segment display are turned on, the number displayed is
1
3
0
8
Answer: Option
Explanation:

38.
In a three input AND gate A = 1, B = 1, C = 0 The output Y =
ABC
ABC
ABC
ABC
Answer: Option
Explanation:

Since C = 0

we get C

Therefore Y = A B C .

39.
DeMorgan's first theorem shows the equivalence of
OR gate and Exclusive OR gate
NOR gate and Bubbled AND gate
NOR gate and NAND gate
NAND gate and NOT gate
Answer: Option
Explanation:

First theorem A + B = A . B.

40.
0.10112 = __________ .
0.687510
0.680010
0.010010
0.500010
Answer: Option
Explanation:

0.5 + 0 + 0.125 + 0.0625 = 0.6875.

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