21. Wired logic is not possible in—

1. 1. ECL

   
   
   

   2. TTL with active pull-up

   
   
   

   3. open-collector TTL

   
   
   

   4. TTL with passive pull-up
      

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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22. Complementary outputs are available in—

1. 1. ECL gates

   
   
   

   2. TTL gates

   
   
   

   3. DTL gates

   
   
   

   4. RTL gates

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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23. TTL circuits with active pull-up are preferred because of their suitability for—

1. 1. wired – AND operation

   
   
   

   2. bus operated system

   
   
   

   3. wired logic operation

   
   
   

   4. reasonable power dissipation and speed of operation

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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24. The open input terminal of a TTL gate—

1. 1. will assume a very high voltage

   
   
   

   2. will behave as if it is connected to logic 0 level

   
   
   

   3. will behave as if it is connected to logic 1 level

   
   
   

   4. none of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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25. HTL is the modified version of …… logic gate family.

1. 1. DCTL

   
   
   

   2. TTL

   
   
   

   3. CMOS

   
   
   

   4. ECL

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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