Next Article in Journal
Novel Networked Remote Laboratory Architecture for Open Connectivity Based on PLC-OPC-LabVIEW-EJS Integration. Application in Remote Fuzzy Control and Sensors Data Acquisition
Next Article in Special Issue
Tunnel Magnetoresistance Sensors with Magnetostrictive Electrodes: Strain Sensors
Previous Article in Journal
A Photoactivated Gas Detector for Toluene Sensing at Room Temperature Based on New Coral-Like ZnO Nanostructure Arrays
Previous Article in Special Issue
Exchange Bias Tuning for Magnetoresistive Sensors by Inclusion of Non-Magnetic Impurities
Article Menu

Export Article

Open AccessArticle
Sensors 2016, 16(11), 1821; doi:10.3390/s16111821

Sensitivity and 3 dB Bandwidth in Single and Series-Connected Tunneling Magnetoresistive Sensors

1
Department of Electronics, AGH University of Science and Technology, Krakow 30-059, Poland
2
Silicon Creations, 49 Highway 23 NE, Suwanee 30024, GA, USA
3
Singulus Technologies AG, Kahl am Main 63796, Germany
4
INESC-MN and IN, Lisbon 1000-029, Portugal
5
Physics Department, Instituto Superior Tecnico, Universidade de Lisboa, Lisbon 1600-276, Portugal
6
INL-International Iberian Nanotechnology Laboratory, Avenida Mestre José Veiga s/n, Braga 4715-330, Portugal
*
Author to whom correspondence should be addressed.
Academic Editor: Andreas Hütten
Received: 20 August 2016 / Revised: 10 October 2016 / Accepted: 12 October 2016 / Published: 31 October 2016
(This article belongs to the Special Issue Magnetoresistive Sensors under Extreme Conditions)
View Full-Text   |   Download PDF [1999 KB, uploaded 31 October 2016]   |  

Abstract

As single tunneling magnetoresistive (TMR) sensor performance in modern high-speed applications is limited by breakdown voltage and saturation of the sensitivity, for higher voltage applications (i.e., compatible to 1.8 V, 3.3 V or 5 V standards) practically only a series connection can be applied. Thus, in this study we focused on sensitivity, 3 dB bandwidth and sensitivity-bandwidth product (SBP) dependence on the DC bias voltage in single and series-connected TMR sensors. We show that, below breakdown voltage, the strong bias influence on sensitivity and the 3 dB frequency of a single sensor results in higher SBP than in a series connection. However, the sensitivity saturation limits the single sensor SBP which, under 1 V, reaches the same level of 2000 MHz∙V/T as in a series connection. Above the single sensor breakdown voltage, linear sensitivity dependence on the bias and the constant 3 dB bandwidth of the series connection enable increasing its SBP up to nearly 10,000 MHz∙V/T under 5 V. Thus, although by tuning bias voltage it is possible to control the sensitivity-bandwidth product, the choice between the single TMR sensor and the series connection is crucial for the optimal performance in the high frequency range. View Full-Text
Keywords: current sensors; high-speed electronics; magnetoresistive sensors; sensitivity-bandwidth product; tunneling magnetoresistance current sensors; high-speed electronics; magnetoresistive sensors; sensitivity-bandwidth product; tunneling magnetoresistance
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Dąbek, M.; Wiśniowski, P.; Stobiecki, T.; Wrona, J.; Cardoso, S.; Freitas, P.P. Sensitivity and 3 dB Bandwidth in Single and Series-Connected Tunneling Magnetoresistive Sensors. Sensors 2016, 16, 1821.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top