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Digital Electronics

Digital Electronics
How many stable state/states present in flip-flop ?

 1
 3
 4
 2

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Digital Electronics
The universal gate is ___________

OR gate
NAND gate
None of these
AND gate

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Digital Electronics
In which code do the successive code characters differ in only one position?

 XS-3 code
 Gray code
 8421 code
 Hamming code

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Digital Electronics
The output of a logic gate is 0 when all its inputs are at logic 0. The gate is either

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

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Digital Electronics
The simplified block diagram of a 10-bit A/D converter of dual slope integrator type is shown in figure. The 10-bit counter at the output is clocked by a 1 Mhz clock. Assuming negligible timing overhead for the control logic, the maximum frequency of the analog signal that can be converted using this A/D converted is approximately .

 250 Hz.
  1 KHz.
 500 Hz.
 2 KHz.

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Digital Electronics
In an SR latch built from NOR gates, which condition is not allowed

 S=0, R=1
 S=0, R=0
 S=1, R=1
 S=1, R=0

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