Sequential Logic Circuits Quiz

A circuit whose output depends on both current inputs and past outputs.

A component that stores previous outputs, enabling sequential processing.

A circuit synchronized by a clock signal, changing at a specific moment.

Synchronous sequential circuits are synchronized to a clock, Asynchronous are not

A type of bistable circuit that stores one bit.

A device with two stable states, like logic 0 and logic 1.

A signal that synchronizes circuit operations.

Processing data in a time-ordered manner, remembering prior inputs.

A basic building block for sequential circuits, it stores one bit of data and has two inputs: Set (S) and Reset (R).

When the S input is high (1) and the R input is low (0), the flip-flop stores a '1' and the output Q is high.

Sequential circuits can be classified into synchronous and asynchronous types, depending on their dependence on a clock signal.

When the S input is low (0) and the R input is high (1), the flip-flop stores a '0' and the output Q is low.

Once the flip-flop is set or reset, it maintains its state even if the input conditions change.

Asynchronous circuits are challenging to design because their outputs can be uncertain due to unpredictable timing delays.

Sequential circuits are essential components in computer processors for handling instructions and data flow.

The output of a NAND gate is '0' only if all inputs are '1'.

Represents a high voltage or signal, typically representing 'true' or 'on'.

A circuit with two stable states used to store a single bit of information. It's the building block of sequential logic.

Represents a low voltage or signal, typically representing 'false' or 'off'.

Sequential logic can be categorized as event-driven, clock-driven, and pulse-driven, based on how they are triggered.

A basic sequential logic component that can hold one of two stable states, typically used to store a single bit of data.

When the set input (S) is HIGH and the reset input (R) is also HIGH, the output (Q) remains LOW, regardless of previous states. This is called the 'Reset' state.

A table organizing all possible combinations of S, R inputs and their corresponding outputs (Q, Q') for an SR flip-flop.

An SR flip-flop built using NAND gates, where the inputs are active LOW (logic '0') and change state with rising edges.

Similar to the NAND gate version, but uses NOR gates instead. Inputs are active HIGH and the invalid condition occurs when S and R are both HIGH.

An SR flip-flop that has an extra 'Enable' (EN) input. Only when EN is HIGH can the flip-flop change its state.

The JK flip-flop is similar to SR, but uses inputs J and K, instead of S and R. J and K are not abbreviations, but rather distinct letters.

JK flip-flops overcome the limitations of SR flip-flops by eliminating the invalid state (S=R=0) and ensuring proper latching even when the inputs change state.

The JK flip-flop is widely used in sequential logic circuits because it is considered a 'universal' flip-flop, meaning it can perform any task a basic SR flip-flop can.

The action of changing the state of a T Flip-Flop from HIGH to LOW or vice versa.

The input that controls the toggling behavior of the T Flip-Flop. When T is HIGH (1), the flip-flop toggles on each clock pulse.

The equation Q+1 = T.Q’ + T’.Q represents the switching behavior of a T Flip-Flop, where Q is the current output and Q+1 is the next state.

A T Flip-Flop can be built using a D Flip-Flop and an XOR gate. The Q output is fed back as one input to the XOR gate, and the T input is the other.

The output (Q) of a T Flip-Flop changes state on each clock pulse, making it a useful element for creating a divide-by-two circuit.

T Flip-Flops do not have a predefined initial state. Additional circuitry like Preset (Pre) or Clear (Clr) inputs is needed to set the initial value of Q.

Since the T Flip-Flop toggles with each clock pulse, the output Q creates a signal with a frequency half of the clock frequency, effectively implementing a divide-by-two circuit.

The circuit consists of an SR Flip Flop with an inverter between the SET and RESET inputs, controlled by a DATA input and a CLOCK input.

The 'D' input determines the data to be stored in the flip-flop. It essentially 'loads' the information into the 'D' Flip Flop.

The 'Clock' input synchronizes the flip-flop's operation, allowing the data to be stored only when the 'Clock' is in a specific state.

The inverter connects the 'SET' and 'RESET' inputs together, preventing them from being active simultaneously, removing the ambiguity of the SR Flip Flop.

When the 'Clock' is high, the data present at the 'D' input is copied to the output. The flip-flop stores this data.

By introducing a 'Clock' input and an inverter between the SET and RESET inputs, the D Flip Flop avoids the indeterminate state that occurs in the basic SR Flip Flop.

The D Flip-Flop is a modified version of the SR flip-flop with the addition of an inverter between the 'SET' and 'RESET' inputs and a 'Clock' input, ensuring only one input is valid at a time and providing clock synchronization.