A LOW INPUT CAPACITANCE SENSE AMPLIFIER FOR IMPEDANCE IMAGING APPLICATIONS

被引：7

作者：

TOZER, RC

机构：

[1] Dept. of Electron. and Electr. Eng., Sheffield Univ.

来源：

MEASUREMENT SCIENCE AND TECHNOLOGY | 1992年 / 3卷 / 05期

关键词：

Impedance Imaging - Sense Amplifiers;

D O I：

10.1088/0957-0233/3/5/011

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A driven screen sense amplifier for true impedance imaging applications is described. The amplifier uses a discrete front end to achieve a net input capacitance (including cable effects) of about 1 pF and an input resistance of about 100 M-OMEGA over a useful bandwidth of 100 kHz. The factors influencing stability are identified and options for their control are considered. The advantages offered by a well ordered cabling strategy in reducing both screen-to-screen parasitic capacitances and crosstalk are discussed in detail.

引用

页码：508 / 514

页数：7