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HomeHomework HelpelectronicsOp-Amp Gain Basics

Op-Amp Gain Basics

While op-amps do not have infinite gain in practice, their high gain allows for reliable circuit design using negative feedback. Op-amp gain specifications vary between models, and practical op-amp circuits rely on predictable gain behavior.

intermediate
2 hours
Electronics
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Overview

Operational amplifiers (op-amps) are essential components in modern electronics, widely used for amplifying voltage signals. Understanding op-amp gain is crucial for designing effective circuits, as it determines how much the input signal is amplified. There are two primary configurations: inverting...

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Key Terms

Operational Amplifier
A high-gain voltage amplifier with differential inputs.

Example: Op-amps are used in audio equipment to amplify sound signals.

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

Example: A gain of 10 means the output is ten times the input.

Inverting Amplifier
An op-amp configuration that outputs an inverted signal.

Example: If the input is 1V, the output will be -10V with a gain of -10.

Non-Inverting Amplifier
An op-amp configuration that outputs a non-inverted signal.

Example: If the input is 1V, the output will be 10V with a gain of 10.

Feedback
A process where a portion of the output is fed back to the input.

Example: Negative feedback stabilizes the gain of an amplifier.

Voltage Divider
A simple circuit that reduces voltage using resistors.

Example: Two resistors in series can create a lower voltage output.

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Key Concepts

Voltage GainInverting AmplifierNon-Inverting AmplifierFeedback