Preamplifier for electric-current noise measurements at low temperatures

被引：15

作者：

Birk, H ^{[1
]}

Oostveen, K ^{[1
]}

Schonenberger, C ^{[1
]}

机构：

[1] PHILIPS RES LABS,NL-5656 AA EINDHOVEN,NETHERLANDS

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 1996年 / 67卷 / 08期

关键词：

D O I：

10.1063/1.1147083

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We have developed a current preamplifier that operates in a liquid-helium bath cryostat. It has been optimized for the measurement of dynamical electric-current fluctuations (noise) of high-impedance sources R>100 M Omega. A bandwidth of up to 400 kHz has been achieved by effectively minimizing the capacitance of the input transistor with a dynamical feedback. The amplifier measures current noise in a scanning tunneling microscope (STM). It enables the measurement of shot noise for currents as low as 30 pA (sampling rate 5 s) for a high-impedance source with a resistance of R greater than or similar to 1 G Omega, a value typical for tunneling resistances in STM. (C) 1996 American Institute of Physics.

引用

页码：2977 / 2980

页数：4

共 11 条

[1]

Averin D. V., 1991, MESOSCOPIC PHENOMENA

[2] SHOT-NOISE SUPPRESSION IN THE SINGLE-ELECTRON TUNNELING REGIME [J].