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Flip-Flops: Synchronous vs. Asynchronous State Transitions

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Flip-Flops: Synchronous vs. Asynchronous State Transitions

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Questions and Answers

What is the main difference between synchronous and asynchronous state transitions in flip-flops?

State transitions occur independently of any clock in asynchronous transitions. (correct)

All state transitions are controlled by a common clock in synchronous transitions.

Changes in all variables occur concurrently in synchronous transitions.

Changes in all variables do not necessarily occur concurrently in asynchronous transitions.

What is the primary function of flip-flops in digital circuits?

Act as bi-stable multivibrators (correct)

Serve as building blocks for combinational circuits

Conduct data transfer when the switch is on

Control the duration of the pulse

How are latches different from flip-flops in terms of input sensitivity?

Both latches and flip-flops are sensitive to the duration of the pulse.

Neither latches nor flip-flops are sensitive to the duration of the pulse.

Latches are sensitive to the duration of the pulse, while flip-flops are not. (correct)

Flip-flops are sensitive to the duration of the pulse, while latches are not.

What is the purpose of the R (RESET) and S (SET) inputs in NAND-NOR latches (SR latches)?

Facilitate the basic storage element Signup and view all the answers

What characteristic defines Q and Q' outputs in NAND-NOR latches (SR latches)?

They are never equal to each other and complement each other Signup and view all the answers

What is the additional input in a gated latch called?

Enable input Signup and view all the answers

What is the simple rule for the D latch?

Q follows D when the Enable is active Signup and view all the answers

What type of flip-flop changes state either at positive or negative edge of the clock pulse?

Edge-triggered flip-flop Signup and view all the answers

What type of flip-flop requires a complete pulse (0→1 →0) in order to change the output?

Pulse-triggered flip-flop Signup and view all the answers

What are data lock-out flip-flops also known as?

Data latches Signup and view all the answers