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Digital Electronics

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

ECL
TTLAS
TTLLS
CMOS

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Digital Electronics
The codes in which each successive code word differs from the preceding one in only one bit position are called

 cyclic codes
 self-complementing codes
 BCD codes
 sequential codes

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Digital Electronics
Which of the following gates cannot be used as an inverter?

 X-NOR
 AND
 NOR
 NAND

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Digital Electronics
How many entries will be in the truth table of a 3 input NAND gate ?

 9
 8
 3
 6

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Digital Electronics
The output of a logic gate is 1 when all its inputs are at logic 1. The gate is either

 an AND or an OR
 a NAND or a NOR
 an OR or an X-OR
 an AND or a NOR

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Digital Electronics
F’s complement of (2BFD)Hex is

 D403
 E304
 D402
 C403

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