Low noise constant current source for bias dependent noise measurements

被引：19

作者：

Talukdar, D. ^{[1
]}

Chakraborty, R. K. ^{[2
]}

Bose, Suvendu ^{[1
]}

Bardhan, K. K. ^{[1
]}

机构：

[1] Saha Inst Nucl Phys, Kolkata 700064, W Bengal, India

[2] Bidhannagar Coll, Kolkata 700064, W Bengal, India

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2011年 / 82卷 / 01期

关键词：

CHARGE-DENSITY-WAVE; LOW-FREQUENCY NOISE; 1/F NOISE; PERCOLATION-THRESHOLD; MANGANITES; TOOL;

D O I：

10.1063/1.3509385

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

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 mu A 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. (C) 2011 American Institute of Physics. [10.1063/1.3509385]

引用

页数：6

共 25 条

[1] 1/f resistance noise in the large magnetoresistance manganites [J].