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Digital Electronics

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
All the integers and decimal numbers are represented by

 real numbers
 whole numbers
 odd numbers
 even numbers

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Digital Electronics
A gate is enabled when its enable input is at logic 1. The gate is

 OR
 NAND
 NOR
 none of these

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Digital Electronics
The number A = 01110000 and B = 10101111 are in 2’s complement form .Addition of above two number is

 10101111
 11100000
 011100001
 00011111

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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 .

 2 KHz.
  1 KHz.
 500 Hz.
 250 Hz.

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Digital Electronics
Which of the logical operations is represented by the + sign in Boolean algebra ?

 AND
 OR
 NAND
 NOT

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