26. 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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27. 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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28. 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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29. n-channel MOS devices are preferred over p-channel MOS devices for digital circuit because—

1. 1. lower power dissipation

   
   
   

   2. higher power dissipation

   
   
   

   3. higher mobility of electrons than holes

   
   
   

   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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30. For fastest switching operation, it is preferred to use—

1. 1. Normal p-n junction diode

   
   
   

   2. Schottky diodes

   
   
   

   3. Vacuum diodes

   
   
   

   4. Zener diodes

   
   
   

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1. View Hint View Answer Discuss in Forum

   Schottky diodes is used for fastest switching operation, because in this mode of operation diode prevents from going in to the saturation.

   Correct Option: B

   Schottky diodes is used for fastest switching operation, because in this mode of operation diode prevents from going in to the saturation.

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