TITLE

Low noise constant current source for bias dependent noise measurements

AUTHOR(S)
Talukdar, D.; Chakraborty, R. K.; Bose, Suvendu; Bardhan, K. K.
PUB. DATE
January 2011
SOURCE
Review of Scientific Instruments;Jan2011, Vol. 82 Issue 1, p013906
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A low noise constant current source used for measuring the 1/f noise in disordered systems in ohmic as well as nonohmic regime is described. The source can supply low noise constant current starting from as low as 1 μA to a few tens of milliampere with a high voltage compliance limit of around 20 V. The constant current source has several stages, which can work in a standalone manner or together to supply the desired value of load current. The noise contributed by the current source is very low in the entire current range. The fabrication of a low noise voltage preamplifier modified for bias dependent noise measurements and based on the existing design available in the MAT04 data sheet is also described.
ACCESSION #
57679708

 

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