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Digital Electronics

Digital Electronics
1 Kilo bits are equal to

 1008 bits
 1012 bits
 1024 bits
 1000 bits

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Digital Electronics
(44)8 in BCD 8421 code is

 00110110
 01000100
 01100011
 00100100

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Digital Electronics
2's Complement of 10101011 is

 00111100
 10101011
 10101100
 01010101

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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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Digital Electronics
While using a frequency counter for measuring frequency, two modes of measurement are possible. 1. Period time 2. Frequency mode There is a ‘cross-over frequency’ below which the period mode is preferred. Assuming the crystal oscillator frequency to be 4Mhz the crossover frequency is given by

 8 Mhz
 2 Khz
 1 Khz
 2 Mhz

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Digital Electronics
The binary number 10101 is equivalent to decimal number ___________.

27
21
12
19

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