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In noise analysis of operational amplifiers, the following is considered: Noise generated by the external components (resistors in feedback network etc.) Noise generated by the operational ampl...
#1: Initial revision
by
Mu3
·
2021-07-22T13:15:30Z (over 3 years ago)
Input offset voltage/bias current noise contribution in operational amplifiers
In noise analysis of operational amplifiers, the following is considered: * Noise generated by the external components (resistors in feedback network etc.) * Noise generated by the operational amplifier itself Manufacturers provide "input-referred" voltage and current noise specifications for most operational amplifiers. This figure includes shot, thermal, and flicker noise ([Texas Instruments](https://www.ti.com/lit/an/slva043b/slva043b.pdf)). Op-amps also have an input offset voltage and input bias current specifications. Does the input offset/bias current contribute to the noise of the operational amplifier? If yes, is it included in the input-referred noise figures or does it have to be accounted for separately?