A Low-Noise and Quasi-Ideal DC Current Source Dedicated to Four-Probe Low-Frequency Noise Measurements

Jean-Marc Routoure (1) , Sheng Wu (2) , Carlo Barone (3) , Laurence Méchin (1) , Bruno Guillet (1)

1 Equipe Electronique - Laboratoire GREYC - UMR6072
2 NERCITA - National Engineering Research Center for Information Technology in Agriculture [Beijing]
3 UNISA - Università degli Studi di Salerno = University of Salerno

In this paper, a DC current source dedicated to four-probe low frequency noise measurements is presented. An output impedance value of 3 M with a maximum output current of 1.5 mA was achieved. The white noise level of the current source was measured to be 410-23 A 2 •Hz-1 with a corner frequency of 30 Hz. Thanks to its quasi-ideal behavior in terms of noise level and high output impedance value, this current source can be used to measure the intrinsic noise of materials using four-point measurements without any experimental or analytical corrections.

Mots clés: Low-frequency noise (LFN); DC current source; four-probe measurement

Domaines: Electronique

Jean-Marc Routoure, Sheng Wu, Carlo Barone, Laurence Méchin, Bruno Guillet. A Low-Noise and Quasi-Ideal DC Current Source Dedicated to Four-Probe Low-Frequency Noise Measurements. IEEE Transactions on Instrumentation and Measurement, 2020, 69 (1), pp.194. ⟨10.1109/TIM.2019.2890891⟩. ⟨hal-02273188⟩