126. I²L logic basically consists of—

1. 1. Normal bipolar junction transistors

   
   
   

   2. Multiple collector transistors

   
   
   

   3. Multiple emitter transistors

   
   
   

   4. None of these

   
   
   

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   NA

   Correct Option: B

   NA

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127. ECL circuits have higher fan out because of their—

1. 1. high input impedance

   
   
   

   2. low output impedance

   
   
   

   3. high input and low output impedance

   
   
   

   4. complementary outputs
      

   
   
   

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   NA

   Correct Option: C

   NA

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128. The logic swing of a gate is about 0.8 V, this belongs to the logic family—

1. 1. TTL

   
   
   

   2. NMOS

   
   
   

   3. CMOS

   
   
   

   4. ECL

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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129. Match each of the items a, b and c on the left with an approximate item on the right—
     

     (a) A shift register can be used	(1) for code conversion
     (b) A multiplexer can be used	(2) to generate memory chip to select
     (c) A decoder can be used	(3) for parallel-to-serial conversion
     	(4) as a many to one switch
     	(5) for analog to digital conversion

1. 1. (a) (b) (c)
        1   2   3

   
   
   

   2. (a) (b) (c)
        3   4   2

   
   
   

   3. (a) (b) (c)
        5  4   2

   
   
   

   4. (a) (b) (c)
        1  3  5

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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130. The divide by N counter is shown in figure. If initially Q₀ = 1, Q.1 = 1, Q₂ = 0. What is a value of N?
     

1. 1. 8

   
   
   

   2. 6

   
   
   

   3. 5

   
   
   

   4. 3

   
   
   

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1. View Hint View Answer Discuss in Forum

   Given circuit arrangement
   
   From given circuit arrangement, we get
   
   i.e., After first CLK we get 2 → 1 → 4 again and again. Thus we can conclude that the given arrangement is known as Mod–3 counter. Hence alternative (D) is the correct choice.

   Correct Option: D

   Given circuit arrangement
   
   From given circuit arrangement, we get
   
   i.e., After first CLK we get 2 → 1 → 4 again and again. Thus we can conclude that the given arrangement is known as Mod–3 counter. Hence alternative (D) is the correct choice.

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