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Digital Electronics

Digital Electronics
The 7-bit Hamming code is used to transmit

 3 data bits
 7 data bits
 4 data bits
 no data bits

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Digital Electronics
What logic function is produced by adding an inverter to each input and output of an OR gate?

 NOR
 NAND
 X-OR
 AND

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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.
 900 mV.
 90 mV.

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Digital Electronics
Which one of the following even parity codes are in errors. (I)100110010 (II)011101010 (III)10111111010001010

 Only (II)
 Both (II)&(III)
 Only (III)
 Both (I)&(III)

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Digital Electronics
(1D)16 in BCD 8421 code is

 00011101
 00101001
 00011111
 00100100

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Digital Electronics
In which of the following base systems is 123 not a valid number?

Base 3
Base 8
Base 10
Base 16

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