Op-Amps Formulas
Op-amp formulas set the gain, bandwidth, and response of amplifier and filter stages built around operational amplifiers. These calculators turn feedback resistor values into precise gain and frequency limits. They are foundational to analog signal conditioning.
Op-Amps Formula Calculators
- Non-Inverting Amplifier Vout = Vin × (1 + Rf/Ri)
- Inverting Amplifier Vout = −Vin × Rf/Ri
- Summing Amplifier Vout = −Rf × (V1/R1 + V2/R2 + V3/R3)
- Difference Amplifier Vout = (Rf/Ri) × (V2 − V1)
- Gain-Bandwidth Product GBW = Gain × f
- Common-Mode Rejection Ratio CMRR = 20 × log10(Ad / Acm)
- Op-Amp Integrator Gain |Vout| = Vin / (2πfRC)
- Op-Amp Differentiator Gain |Vout| = Vin × 2πfRC
- Instrumentation Amplifier Gain G = (1 + 2R1/Rg) × (R3/R2)
- Op-Amp Schmitt Trigger Hysteresis Vhyst = Vref × R1 / (R1 + R2)
- Transimpedance Amplifier Bandwidth f3dB = √(GBW / (2π × Rf × Cf))
- TIA Feedback Capacitor (Stability) Cf = √(Cin / (2π · Rf · fGBW))
- TIA Optimal Bandwidth f−3dB = √(fGBW / (2π · Rf · Cin))
- Settling Time to N-Bit Accuracy ts = (N + 1) · ln2 · τ
- Op-Amp RMS Noise Vn = en · √(NEB)
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