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Digital Electronics

Digital Electronics
What is the gray code for the binary 101011?

 110101
 111110
 101011
 011111

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Digital Electronics
ASCII and EBCDIC codes are

 alphanumeric codes
 BCD codes
 numeric codes
 error correcting codes

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Digital Electronics
An X-OR gate gives a high output

 if the decimal value of digital word is even
 if it has even number of 0s
 if there are odd number of 1s
 for odd decimal value.

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Digital Electronics
The 2s complement of 17 is

  101111.
 110001.
 101110.
 111110.

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Digital Electronics
X = 01110 and Y = 11001 are two 5-bit binary numbers represented in 2’s complement format. The sum of X and Y in 2’s complement format using 6 bits is

 101001
 001000
 0001111
 100111

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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.
 500 Hz.
  1 KHz.
 2 KHz.

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