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Very low-noise, high-accuracy programmable voltage reference

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3 Author(s)
Pace, C. ; Dipt. di Elettronica, Informatica e Sistemistica, INFM, Rende, Italy ; Ciofi, C. ; Crupi, F.

We have designed and tested a very low-noise, high-accuracy programmable voltage reference that is intended as an alternative to batteries for the realization of automated low-frequency noise measurement systems. The output voltage, which can be set via a built-in RS232 interface, ranges from 0 to 5 V with a resolution and long-term stability of ±250 μV. The power spectral density of the output voltage fluctuations is less than 2·10-16 V2/Hz at 100 mHz and remains below 10-17 V2/Hz above 1 Hz.

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Instrumentation and Measurement, IEEE Transactions on  (Volume:52 ,  Issue: 4 )