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Digital Electronics

Digital Electronics
Which of the following codes is known as the 8421 code?

 BCD code
 Gray code
 XS-3 code
 ASCII code

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Digital Electronics
Dual slope ADC has R = 1 KΩ and C = 0.22 nanofarad has charging and discharge times for some voltage is 9 ns and 3 ns respectively. The reference Voltage is 2.2 V. What is the peak voltage reached by triangular wave during charging?

 90 mV.
 30 mV.
 900 mV.
 300 mV.

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Digital Electronics
A single flip-flop can be cleared (reset) to

 Both A and B
 0
 None
 1

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Digital Electronics
(44)8 in BCD 8421 code is

 00110110
 01100011
 01000100
 00100100

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Digital Electronics
If two numbers in excess-3 code are added and the result is less than 9, then to get equivalent binary

 0011 is subtracted
 0011 is added
 0110 is subtracted
 0110 is added

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Digital Electronics
A digital circuit that can store on bit is a

 flip-flop
 gate
 XOR gate
 registor

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