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Digital Electronics

Digital Electronics
What logic function is produced by adding an inverter to each input and output of an OR gate?

 NOR
 X-OR
 NAND
 AND

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Digital Electronics
Truth table is used to express

 Boolean matrix
 Boolean map
 Boolean expression
 Boolean addition

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Digital Electronics
Among the logic families, the family which can be used at very high frequency greater than 100 MHz in a 4 bit synchronous counter is

TTLAS
CMOS
ECL
TTLLS

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Digital Electronics
What is the requirement of fullsubstractor circuit ?

 Three inputs and two outputs
 Two inputs and three outputs
 Two inputs and two outputs
 Three inputs and one output

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Digital Electronics
The main criterion in the design of a digital circuit is reduction of

 volume
 cost
 weight
 size

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Digital Electronics
The output of a NAND gate is low

 only when at least one input is low
 only when all the inputs are low
 only when all the inputs are high
 only when at least one input is high

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