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Digital Electronics

Digital Electronics
For 4 bit parallel addition, we need ________ half adder(s) and ________ full adder(s)

 1 and 4
 1 and 3
 0 and 4
 0 and 3

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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

 2 Khz
 1 Khz
 2 Mhz
 8 Mhz

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Digital Electronics
X + X.Y = ?

 1
 0
 Y
 X

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Digital Electronics
A switch-tail ring counter is made by using a single D-FF, the following circuit is

  T FF.
  J-K FF.
  D FF.
  S-R FF.

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Digital Electronics
Temperature variation is a/an

 Digital quantity
 Either Digital or Analog quantity
 Analog quantity
 None

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Digital Electronics
When an input signal 1 is applied to a NOT gate, the output is ___________.

None of these
1
Either 0 & 1

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