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Digital Electronics

Digital Electronics
To get an excess-3 code from BCD code

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

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Digital Electronics
Why encoder is used in the digital electronics ?

 To convert non coded information into coded form
 It is used to separate address bus and data bus
None of these
 To convert coded information into non coded form

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Digital Electronics
A boolean function can be transformed into logical ________.

 diagram
 matrix
 graph
 map

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Digital Electronics
8421 code is

 weighted code
 alphanumeric code
 non-weighted code
 self-complementing code

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Digital Electronics
The output of a gate is HIGH when at least one of its inputs is LOW. It is true for

 X-OR
 NOR
 NAND
 OR

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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?

 300 mV.
 30 mV.
 90 mV.
 900 mV.

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