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. Author manuscript; available in PMC: 2018 Oct 1.
Published in final edited form as: IEEE Trans Biomed Circuits Syst. 2017 Jul 20;11(5):1041–1052. doi: 10.1109/TBCAS.2017.2712566

Fig. 3.

Fig. 3

Calculated noise figure as a function of frequency and noise-matching factor N for the specified voltage and current noise characteristics of the ADA4817 operational amplifier. The maximum achievable bandwidth over which the system has a noise figure less than 3 dB is 1.3 MHz, which occurs at N = 386. Note: JFET flicker noise is not shown here, but the input voltage noise for the ADA4817 is less than 5 nV/Hz from 10 kHz onward. Correlated voltage-current noise is likewise not shown, but would degrade noise figure by no more than 30% (2.3 dB) at frequencies above 5 MHz [11], [13].