Science & engineering
Ideal op-amp gain
Compare ideal inverting and non-inverting closed-loop amplifier results.
A clear answer. Here’s how.
Ideal non-inverting gain = 1+Rf/Rg; ideal inverting gain = −Rf/Rin. Output = gain × input, relative to the same zero reference. Reports signed gain, magnitude in dB and ideal output. Assumes stable negative feedback; supply rails, output headroom, gain-bandwidth, input range and slew rate are not modelled.
See a worked example
Worked example
A fixed demonstration, separate from the values you enter above.
- Feedback topology
- Non-inverting
- Input or ground resistor (Ω)
- 10000
- Feedback resistor (Ω)
- 100000
- Input signal relative to reference (V)
- 0.1
Example result
- Signed voltage gain
- 11
- Gain magnitude
- 20.8278537032 dB
- Ideal output signal
- 1.1 V
Ideal closed-loop result; supply rails and the selected amplifier’s limits are not applied.