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Digital Electronics

Digital Electronics
A demultiplexer is a

 N-to-1 device
 1-to-1 device
 N-to-N device
 1-to-N device

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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.
 90 mV.
 900 mV.
 30 mV.

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Digital Electronics
A 15-bit Hamming code requires

 4 parity bits
 5 parity bits
 15 parity bits
 none of these.

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Digital Electronics
The output of a logic gate is 1 when all its inputs are at logic 1. The gate is either

 an OR or an X-OR
 an AND or an OR
 a NAND or a NOR
 an AND or a NOR

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Digital Electronics
The set of which logic gates is designated as universal gate?

 NOT, OR , AND.
  NOR , NAND.
 XNOR, NOR, NAND.
 XNOR, NOR, NAND.

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Digital Electronics
Complement of NOR and OR gate is ________ and ________ respectively.

 AND, NAND
 NOR, OR
 OR, NOR
 NAND, AND

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