121. The logic family with highest noise margins is—

1. 1. HTL

   
   
   

   2. I²L

   
   
   

   3. TTL

   
   
   

   4. CMOS

   
   
   

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   NA

   Correct Option: A

   NA

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122. The logic family which is most suitable in the industrial environment is—

1. 1. I²L

   
   
   

   2. HTL

   
   
   

   3. TTL

   
   
   

   4. CMOS

   
   
   

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   As in the industrial environment, there is a lot of possibility of noise, so in such environment we need a logic having high noise margin. So among the given logic family HTL (high threshold logic) have highest Noise-Margin i.e., best suited for industrial environment.

   Correct Option: B

   As in the industrial environment, there is a lot of possibility of noise, so in such environment we need a logic having high noise margin. So among the given logic family HTL (high threshold logic) have highest Noise-Margin i.e., best suited for industrial environment.

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123. The output 0 and 1 level for TTL logic family is approximately—

1. 1. 0.1 and 5 V

   
   
   

   2. 0.6 and 3.5 V

   
   
   

   3. 0.9 and 1.75 V

   
   
   

   4. – 1.75 and – 0.9 V

   
   
   

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   Alternative (B) is most appropriate for a TTL logic family.

   Correct Option: B

   Alternative (B) is most appropriate for a TTL logic family.

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124. The maximum frequency at which digital data can be applied to gate is defined as—

1. 1. operating speed

   
   
   

   2. propagation speed

   
   
   

   3. binary level transition period

   
   
   

   4. charging time

   
   
   

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   NA

   Correct Option: A

   NA

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125. The allowable supply voltage range for TTL logic gate family is—

1. 1. 2 to 5.6 V

   
   
   

   2. 3.5 to 6.2 V

   
   
   

   3. 4.75 V to 5.25 V

   
   
   

   4. 4 to 6 V

   
   
   

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   NA

   Correct Option: C

   NA

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