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Digital Electronics

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

 NOR
 NAND
 OR
 AND

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Digital Electronics
If in a base b number system, 54/4=13, the base of the number is

 9
 6
 7
 8

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Digital Electronics
How many stable state/states present in flip-flop ?

 2
 1
 4
 3

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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.
 900 mV.
 90 mV.
 300 mV.

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Digital Electronics
The AND-OR realization of a combinational circuit requires three 3-input AND gates and one 3-input OR gate. This circuit can be designed using

None of these
 four input NAND gates only
 three 3-input NAND gates and one 3-input NOR gate
 three 3-input OR gates and one 3-input AND gate

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Digital Electronics
The maximum positive and negative numbers that can be represented in one’s complement using n-bits are respectively

 +2n-1,-(2n-1-1)
 +(2n-1-1),-(2n-1-1)
 None of these
 +(2n-1-1),-2n-1

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