The figure given below shows the circuit of which one of the following is

1.  Bi-stable multi-vibrator

2.  Schmitt trigger

3.  Mono-stable multi-vibrator

4.  Astable multi-vibrator

View Answer  
4
Correct Answer :

Mono-stable multi-vibrator


Explanation :
No Explanation available for this question

The black box in the figure below, consists of a minimum complexity circuit that uses only AND, OR and NOT gates The function f(x, y, z) = 1 whenever x, y are different and 0 otherwise. In addition the 3 inputs x, y, z are never all the same value. Which one of the following equations leads to the correct design for the minimum complexity circuit

1.  x’y+xy’

2.  x+yz’

3.  x’y’z+xy’z

4.  xy+y’z+z’

View Answer  
4
Correct Answer :

x’y+xy’


Explanation :
No Explanation available for this question

The state transition diagram for the logic circuit shown is

1.  

2.  

3.  

4.  

View Answer  
4
Correct Answer :


Explanation :
No Explanation available for this question

For the circuit shown in the figure below, what is the frequency of the output Q

1.  Twice the input clock frequency

2.  Half the input clock frequency

3.  Same as the input clock frequency

4.  Inverse of the propagation delay of the FF

View Answer  
4
Correct Answer :

Half the input clock frequency


Explanation :
No Explanation available for this question

An 8085 microprocessor based system uses a 4k x 8bit RAM whose starting address is AAOO H. The Address of Last byte in this RAM is

1.   0FFF H

2.  1000 H

3.  B9FF H

4.  BA00 H

View Answer  
4
Correct Answer :

B9FF H


Explanation :
No Explanation available for this question

The circuit shown below is to be used to implement the function Z=f(A, B) = +B   What value is to be selected for I and J?

1.  I=0, J=B

2.  I=A, J=B

3.  I=B, J=1

4.  I=, J=0

View Answer  
4
Correct Answer :

I=B, J=1


Explanation :
No Explanation available for this question

Which one of the following logic operations is performed by the digital circuit shown below

1.  NOR

2.  NAND

3.  X-OR

4.  OR

View Answer  
4
Correct Answer :

X-OR


Explanation :
No Explanation available for this question

In the circuit given below, both transistors have the same VT. What is the approximate value of the highest possible output voltage Vout, if Vin can range from 0 to VDD (Assume 0

1.  VDD-VT

2.  VDD

3.  VT

4.  0

View Answer  
4
Correct Answer :

VDD-VT


Explanation :
No Explanation available for this question

In figure, the Boolean expression for the output in terms of inputs A, B and C when the clock ‘ck’ is high, is given by___

1.  c(A+B)

2.  c(A-B)

3.  c(B-A)

4.  c(B+A)

View Answer  
4
Correct Answer :

c(A+B)


Explanation :
No Explanation available for this question

Consider the following statements: A 4:16 decoder can be constructed (with enable input) by 1. Using four 2:4 decoders (each with an enable input) only 2. Using five 2:4 decoders (each with an enable input) only 3. Using two 3:8 decoders (each with an enable input) only 4. Using two 3:8 decoders (each with an enable input) and an inverter

1.  2 and 3

2.  1 only

3.  2 and 4

4.  None of these

View Answer  
4
Correct Answer :

2 and 4


Explanation :
No Explanation available for this question
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