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arXiv · 1012.5898

Low noise constant current source for bias dependent noise measurements

D. Talukdar·R. K. Chakraborty·Suvendu Bose·K. K. Bardhan
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Abstract

A low noise constant current source used for measuring the $1/f$ noise in disordered systems in ohmic as well as non-ohmic regime is described. The source can supply low noise constant current starting from as low as 1 $μ$A to a few tens of mA with a high voltage compliance limit of around 20 Volts. 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.

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BibTeXRIS

D. Talukdar, R. K. Chakraborty, Suvendu Bose, K. K. Bardhan. 2010-12-29. Low noise constant current source for bias dependent noise measurements. https://doi.org/10.1063/1.3509385

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