electrical

Op-Amp Gain

Inverting, non-inverting, and voltage follower gain — linear and dB, input impedance, op-amp schematic.

Configuration

Inputs

Feedback Resistor Rf

Input Resistor Rin

Input Voltage Vin (optional)

Results

Gain (linear)—

Gain (dB)—

Vout—

Input Impedance Zin—

Gain = −Rf/Rin · Vout = gain × Vin
Zin ≈ Rin (virtual ground at − input)

A = −Rf/Rin · dB = 20·log₁₀|A|