It can be a difficult endeavor.

At 25 Celsius degrees, with a 100 Hz bandwidth, over a 50 Ohm resistance yo=
ur=20
thermal noise will be around 9 nanovolts RMS.

Good luck.

Marcelo Fornaso



________________________________
From: Yigit Turgut <y.turgut@gmail.com>
To: Microcontroller discussion list - Public. <piclist@mit.edu>
Sent: Thu, March 10, 2011 10:45:31 AM
Subject: [EE] Generating Nano-Scale AC voltages

Hi everyone,

For some boring reasons, I need to have 10^-9 AC Volts (nV) on my
desktop and I am seeking ideas for implementation. I would prefer to
do the trick with a few analog components and seems like it can be
done so but once implemented I doubt the precision will occur since
any environmental effect (thermal, emi etc) will be able to effect the
output very easily. The circuit can run from any kind of source and
frequency is can vary between 1-100 Hz.

I would like to hear your approaches on this.

Have a nice day!
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