Low noise constant current source for bias dependent noise measurements
Abstract
A low noise constant current source used for measuring the 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 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.
Cite
@article{arxiv.1012.5898,
title = {Low noise constant current source for bias dependent noise measurements},
author = {D. Talukdar and R. K. Chakraborty and Suvendu Bose and K. K. Bardhan},
journal= {arXiv preprint arXiv:1012.5898},
year = {2015}
}
Comments
7 pages, 7 figures, to be published in Review of Scientific Instruments