Feedback in Sequential Circuits

What is Feedback?

Feedback in sequential circuits refers to the connection of the output of a circuit back to its input, either directly or indirectly.

Types of Feedback

• Positive Feedback: Positive feedback occurs when the output of a circuit is fed back to its input in phase with the input signal.
• Negative Feedback: Negative feedback occurs when the output of a circuit is fed back to its input out of phase with the input signal.

Diagram: Positive Feedback

Importance of Feedback

• Stability: Feedback can affect the stability of a sequential circuit.
• Oscillations: Feedback can cause oscillations in a sequential circuit.
• Memory: Feedback is used to create memory elements in sequential circuits.

Applications

• Flip-Flops: Feedback is used in flip-flops to create memory elements.
• Counters: Feedback is used in counters to create sequential logic.
• Finite State Machines: Feedback is used in finite state machines to create complex sequential logic.