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Digital Electronics

Digital Electronics
A 15-bit Hamming code requires

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

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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?

 30 mV.
 90 mV.
 300 mV.
 900 mV.

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Digital Electronics
What is the logic which controls a stair case light associated with two switches A and B located at the bottom and top of the stair case respectively?

 X-OR
 OR
 X-NOR
 AND

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Digital Electronics
Assuming 8 bits for data, 1 bit for parity, I start bit and 2 stop bits, the number of characters that 1200 BPS communication line can transmit is.

None of these
12 CPS
120 CPS
10 CPS

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Digital Electronics
A half adder is a ________ circuit.

 Sequential
 None
 Both A and B
 Combinational

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Digital Electronics
Convert the binary number (1111000011110000) to hexadecimal number

 5050
 7070
 F0F0
 1010

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