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)

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 amplif...

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Veröffentlicht in:arXiv.org 2008-11
Hauptverfasser: Callegaro, Luca, Pisani, Marco, Pollarolo, Alessio
Format: Artikel
Sprache:eng
Schlagworte:
Amplification
Amplifiers
Electric potential
Field effect transistors
Gain
Semiconductor devices
Signal analyzers
Signal reconstruction
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Zusammenfassung: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.
ISSN:2331-8422