Very simple FET amplifier with a voltage noise floor less than 1 nV/sqrt(Hz)

Details Very simple FET amplifier with a voltage noise floor less than 1 nV/sqrt(Hz) Very simple FET amplifier with a voltage noise floor less than 1 nV/sqrt(Hz)

2008-11-18

arxiv.org/abs/0811.2866v1

Physics

Instrumentation and Detectors

3 figures

Scientific paper

A field-effect transistor (FET) amplifier for small voltage signals is presented. Its design is elementary and the construction can be afforded by anyone. Despite its simplicity, with a voltage noise less than 1 nV/sqrt(Hz), it outperforms commercially available integrated FET amplifiers. The amplifier has a gain flatness better than 1 dB over 1 MHz bandwidth; it can be employed as a front-end for signal analyzers or signal recovery systems.

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