A fully integrated DC to 75 MHz current sensing circuit with on-chip Rogowski coil.

authored by

Tobias Funk, Bernhard Wicht

Abstract

A wide-bandwidth galvanically isolated current sensing circuit with an integrated Rogowski coil in 180 nm CMOS is presented. Exploiting the high-frequency properties of an optimized on-chip Rogowski coil, currents can be measured up to a bandwidth of 75 MHz. The analog sensor front-end comprises a two-stage integrator, which allows a chopper frequency below signal bandwidth, resulting in 2.2mVrms output noise. An additional integrated Hall sensor extends the measurement range towards DC.

Organisation(s)

Mixed-Signal Circuits Section

Type

Paper

Pages

1-4

No. of pages

4

Publication date

2018

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Hardware and Architecture, Electronic, Optical and Magnetic Materials, Electrical and Electronic Engineering

Electronic version(s)

https://doi.org/10.1109/cicc.2018.8357028 (Access: Closed)