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Question

Which of the following circuit is used as a 'Memory device' in computers?

A
Rectifier
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B
Flip-Flop
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C
Comparator
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D
Attenuator
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Solution

The correct option is B Flip-Flop

Flip-Flop circuit is used as a 'Memory device' in computers.

A flip-flop is a device which stores a single bit (binary digit) of data; one of its two states represents a "one" and the other represents a "zero". Such data storage can be used for storage of state, and such a circuit is described as sequential logic in electronics.

A flip-flop or latch is a circuit that has two stable states and can be used to store state information as Memory devices. The difference between a latch and a flip-flop is that a latch is asynchronous, and the outputs can change as soon as the inputs do (or at least after a small propagation delay). A flip-flop, on the other hand, is edge-triggered and only changes state when a control signal goes from high to low or low to high.

The designing of the flip flop circuit can be done by using logic gates such as two NAND and NOR gates. Each flip flop consists of two inputs and two outputs, namely set and reset, Q and Q'. This kind of flip flop is stated to as an SR flip flop or SR latch.

It is a circuit where the output not only depends on the present inputs, but also depends on the former input and outputs. It also works as switch.The flip-flop can be constructed by using two NAND gates or two NOR gates. Each flip flop consists of two inputs, SET and RESET and two outputs, Q and Q'.


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