Non-Inverting Amplifier

Gain = 1 + Rf/Rg with very high input impedance.

Easy

The input goes to the + input; the feedback divider $R_f$ / $R_g$ feeds the − input.

$A_v = 1 + \frac{R_f}{R_g}$

Input impedance is very high (the op-amp input itself), so it barely loads the source. Example: $R_f$ = 9 kΩ, $R_g$ = 1 kΩ → gain 10.

Sub-topics (1)

A unity-gain buffer: output equals input, with high input and low output impedance.

Beginner♥ 0🔖 0💬 0

Spotted a mistake or want to add detail? Suggest an improvement — Content Contributors' edits are reviewed by editors before they go live.