Electronics and Communication Engineering - Digital Electronics

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

A. ± 200 μV/°C
B. ± 400 μV/°C
C. ± 600 μV/°C
D. ± 800 μV/°C

Answer: Option A

Explanation:

, accuracy = 5 mV, temp, .


37. 

If all the LEDs in a seven segment display are turned on, the number displayed is

A. 1
B. 3
C. 0
D. 8

Answer: Option D

Explanation:


38. 

In a three input AND gate A = 1, B = 1, C = 0 The output Y =

A. ABC
B. ABC
C. ABC
D. ABC

Answer: Option C

Explanation:

Since C = 0

we get C

Therefore Y = A B C .


39. 

DeMorgan's first theorem shows the equivalence of

A. OR gate and Exclusive OR gate
B. NOR gate and Bubbled AND gate
C. NOR gate and NAND gate
D. NAND gate and NOT gate

Answer: Option B

Explanation:

First theorem A + B = A . B.


40. 

0.10112 = __________ .

A. 0.687510
B. 0.680010
C. 0.010010
D. 0.500010

Answer: Option A

Explanation:

0.5 + 0 + 0.125 + 0.0625 = 0.6875.