A Wide-Bandwidth Galvanically Isolated Current Sensor with Frequency Modulation

Highly-integrated galvanically isolated current sensing solutions are required to satisfy the demands arising from recent developments in areas such as electric vehicles, smart homes and industrial electronics. These sensors must also be able to provide measurements for wide bandwidths and with high sensitivity levels according to their application. In this thesis, a wide-bandwidth and highly sensitive fully integrated shunt-resistor current sensor for off-chip current sensing is presented. The architecture of the proposed sensor includes a voltage-controlled oscillator-based frequency modulator that offers inductive galvanic isolation and a phase-locked loop-based frequency demodulator. This current sensor solution is implemented in a 65nm CMOS technology, occupies an area of 1.88 mm^2, and achieves a bandwidth of 12.5 MHz. Realizing a sensitivity of 19 mV/A, this sensor is one of the most sensitive solutions reported in the state of the art.

Name thesis:degree_name

Master of Applied Science (M.App.Sc.)

Level thesis:degree_level

Master's

Discipline thesis:degree_discipline

Engineering, Electrical and Computer

Grantor dc:publisher

Carleton University

Year dc:date.issued

2022

Author dc:creator

• Felix, Diego Sebastian

Statement dc:rights

• Copyright © 2022 the author(s). Theses may be used for non-commercial research, educational, or related academic purposes only. Such uses include personal study, research, scholarship, and teaching. Theses may only be shared by linking to Carleton University Institutional Repository and no part may be used without proper attribution to the author. No part may be used for commercial purposes directly or indirectly via a for-profit platform; no adaptation or derivative works are permitted without consent from the copyright owner.

Language dc:language.iso

en

DOI

10.22215/etd/2022-14863

OAI identifier oai:identifier

oai:carleton.scholaris.ca:20.500.14718/42308