Open AccessCommon‐mode rejection ratio characterisation of a broadband electro‐optical differential ESD voltage probe
Author(s) -
Štimac H.,
Gillon R.,
Barić A.
Publication year - 2019
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2019.1820
Subject(s) - common mode signal , common mode rejection ratio , broadband , signal (programming language) , waveform , electronic engineering , voltage , signal processing , differential (mechanical device) , electrostatic discharge , electrical engineering , system of measurement , engineering , computer science , physics , telecommunications , analog signal , cmos , digital signal processing , operational amplifier , amplifier , astronomy , programming language , aerospace engineering
The concept of an isolated differential voltage measurement system is presented. The proposed probe circuit is designed for broadband measurement of electrostatic discharge (ESD) waveforms. The electro‐optical conversion of the measured signal allows the system to operate in an electromagnetically polluted environment. The signal capture and signal processing stages of the system are separated. Characteristics of the system in terms of differential‐mode and common‐mode signal sensing are discussed. The common‐mode rejection ratio (CMRR) of the system is explored in the gigahertz frequency range. Given the low cost, the system can be implemented both as a standalone probe or as a part of an integrated circuit characterisation and test environment.