Very simple FET amplifier with a voltage noise floor less than 1 nV/sqrt(Hz)
Luca Callegaro, Marco Pisani, Alessio Pollarolo
TL;DR
This paper introduces a simple FET amplifier design that achieves a voltage noise floor below 1 nV/√Hz, outperforming commercial amplifiers while maintaining flat gain over a 1 MHz bandwidth, suitable for signal analysis applications.
Contribution
The paper presents an elementary FET amplifier design with exceptionally low voltage noise and wide bandwidth, accessible for widespread use.
Findings
Voltage noise less than 1 nV/√Hz
Gain flatness better than 1 dB over 1 MHz
Cost-effective and easy to build
Abstract
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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Taxonomy
TopicsAdvancements in Semiconductor Devices and Circuit Design · Analog and Mixed-Signal Circuit Design · Neural Networks and Applications