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HomeHomework HelpelectronicsNegative Feedback in Op-Amps

Negative Feedback in Op-Amps

Negative feedback in op-amps involves connecting the output back to the input to achieve self-correction. In negative feedback, the ideal op-amp forces the inverting and non-inverting inputs to be equal, maintaining stability and precise control.

intermediate
2 hours
Electronics
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Overview

Negative feedback in operational amplifiers is a crucial concept that enhances the performance and reliability of electronic circuits. By feeding back a portion of the output to the input in the opposite phase, negative feedback stabilizes gain, improves linearity, and reduces distortion. This techn...

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Key Terms

Operational Amplifier
A high-gain voltage amplifier with differential inputs and a single-ended output.

Example: Op-amps are used in signal conditioning.

Feedback
The process of returning a portion of the output signal to the input.

Example: Feedback can be positive or negative.

Gain
The ratio of output voltage to input voltage in an amplifier.

Example: An op-amp with a gain of 10 amplifies a 1V input to 10V.

Linearity
The degree to which an output signal is directly proportional to the input signal.

Example: High linearity is essential for accurate signal processing.

Stability
The ability of a system to maintain its performance despite changes in conditions.

Example: Negative feedback improves the stability of op-amps.

Distortion
Any alteration of the original signal that affects its shape.

Example: Audio distortion can occur in poorly designed amplifiers.

Related Topics

Positive Feedback
A feedback mechanism that amplifies the output signal, often leading to instability.
intermediate
Operational Amplifier Configurations
Different ways to configure op-amps for various applications, such as inverting and non-inverting.
intermediate
Signal Conditioning
Techniques used to manipulate signals to make them suitable for processing.
advanced

Key Concepts

StabilityGain ControlLinearityFeedback Loop