Op-Amp Non-Inverting Amplifier Circuit

Op-Amp Non-Inverting Amplifier

A non-inverting op-amp amplifier takes its input at the positive terminal and feeds a portion of its output back to the negative terminal. The two feedback resistors set the closed-loop voltage gain, which is one plus the feedback resistor divided by the resistor to ground. This configuration has high input impedance and does not invert the signal. The dual supplies in this schematic allow the output to swing around ground for an AC signal. In a single-supply circuit, bias the input and feedback network around a mid-supply reference instead. Choose an op-amp that supports the supply rails, input range, bandwidth, and load required by the actual application.

類型 電路圖標準 IEEE Std 315 / ANSI Y32.2引擎 schematex-circuit更新時間 2026/9/24

需求

“Draw a non-inverting TL072 op-amp amplifier with a 100 mV AC input, 10 kΩ and 90 kΩ gain resistors, ±12 V supplies, 100 nF decoupling capacitors, and a 10 kΩ load.”

接著試試Change the feedback resistor to 190 kΩ.Add a 1 µF input coupling capacitor.

這張圖裡有什麼

看懂背後的決策。

01Topology

Connect the input to the non-inverting terminal.

02Gain

Use feedback and ground resistors to set closed-loop gain.

03Supply

Decouple both positive and negative rails.

Use for a basic dual-supply non-inverting op-amp gain stage.

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常見問題

How is non-inverting gain calculated?

The ideal gain is 1 plus the feedback resistor divided by the resistor from the inverting input to ground.

Is the output inverted?

No. A non-inverting amplifier keeps the same signal polarity as its input.

Why add decoupling capacitors?

They provide a local low-impedance path for supply noise and transient current near the op-amp.