By Topic

Ultra-low noise chopper amplifier with low input charge injection

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
D. Drung ; Physikalisch-Technische Bundesanstalt (PTB), Abbestraße 2-12, D-10587 Berlin, Germany ; J. -H. Storm

A chopper amplifier is presented which achieves an ultra-low voltage noise of 0.73 nV/√Hz down to a few mHz. Excess white and 1/f current noise was observed which increases with the chopping frequency. At the lowest chopping frequency of 570 Hz, a noise level of 40 fA/√Hz with a 1/f corner at 3 mHz is obtained, corresponding to a noise temperature around 1 K at the optimum source impedance of 18 kO. Special care was taken to compensate the effect of switching spikes in the input chopper, resulting in low charge injection into the signal source.

Published in:

CPEM 2010

Date of Conference:

13-18 June 2010