Op-Amp Noise Calculator

Calculate total output noise of op-amp circuits. Include thermal, voltage, current, and resistor noise.

Gain Noise (V/V)

Bandwidth (kHz)

e_n Voltage Noise (nV/√Hz)

i_n Current Noise (pA/√Hz)

R_source (kΩ)

R_fb (kΩ)

E_{n_total} = √(Σ E_n,i²) × √(1.57·BW) × G

Thermal noise: E_nR = √(4kTR)