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Op-Amp Inverting & Non-Inverting Gain Calculator

Calculate operational amplifier closed-loop voltage gain (Av, dB), output voltage swing limits, feedback resistor values, and 3dB bandwidth cutoff from Gain-Bandwidth Product (GBWP).

e.g. ±15V dual supply (rail limit ~ ±13.5V for standard BJT)
e.g. TL072 = 3 MHz, NE5532 = 10 MHz, LM358 = 1 MHz

Calculation Results

Closed-Loop Voltage Gain (Av): -10.00x (-20.00 dB) 180° Inverted Output Phase
Output Signal Vout (Peak-to-Peak): 5.00 Vpp Linear Range (No Clipping)
Closed-Loop -3dB Bandwidth Cutoff: 300.0 kHz (Full high-fidelity audio passband)
Input Impedance (Zin): 10.0 kΩ (Set by Rin)

About This Calculator

Calculate operational amplifier closed-loop voltage gain (Av, dB), output voltage swing limits, feedback resistor values, and 3dB bandwidth cutoff from Gain-Bandwidth Product (GBWP).

Frequently Asked Questions

What is the difference between an inverting and non-inverting op-amp?

An inverting amplifier produces an output signal 180 degrees out of phase with gain Av = -Rf/Rin, with input impedance equal to Rin. A non-inverting amplifier keeps the output in-phase with gain Av = 1 + Rf/Rin and offers virtually infinite input impedance.

What is Gain-Bandwidth Product (GBWP)?

GBWP is the product of the op-amp's open-loop gain and its bandwidth. Because negative feedback trades gain for bandwidth, an op-amp with a 10 MHz GBWP operating at a closed-loop gain of 10x will have a -3dB cutoff frequency of 1 MHz.

What causes output voltage clipping in op-amps?

An operational amplifier cannot swing its output voltage beyond its power supply rails. For standard op-amps (e.g. TL072, LM741), output clips about 1.5 to 2.0 volts below each supply rail unless a modern rail-to-rail op-amp is used.

What is the 'virtual ground' concept in an inverting amplifier?

Because the op-amp has infinite open-loop gain, negative feedback forces the inverting input voltage to match the grounded non-inverting input (0V). This point acts as a virtual ground, drawing all input current through Rf.