A conventional 1-MΩ transimpedance amplifier has at least 130 of output-noise density at room temperature (Figure 1). You can consider the 130 nV as the theoretical noise floor limit of the amplifier ...
Previously I discussed how to use a spreadsheet to visualize an op amp's Noise to help pick the lowest noise for any source resistance [1]. In this article we will use Texas Instruments capable SPICE ...
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