Publications de Radivoje Popovic

Accurate 3-axis measurement of inhomogeneous magnetic fields

Hall effect based Teslameters/Gaussmeters measure DC and AC magnetic flux densities in the range from a few mu T to about 30 T. For accurate measurement a 3-axis Hall probe is applied with small magnetic field sensitive volume (MFSV) of 100 mu m x 10 mu m ...

2019

14 GHz longitudinally detected electron spin resonance using microHall sensors

Radivoje Popovic, Schahrazede-Lila Mouaziz, Malika Bouterfas

In this work we developed a home-made LOngitudinally Detected Electron Spin Resonance (LODESR) spectrometer based on a microsize Hall sensor. A coplanar waveguide (CPW)-resonator is used to induce microwave-excitation on the sample at 14 GHz. We used InSb ...

Academic Press Inc - Elsevier Science2017

Realization and optimization of bus bar current transducers based on Hall effect sensors

Radivoje Popovic

In this paper the realization and optimization of two coreless open-loop bus bar current transducers based on a Hall effect sensor are presented. Two types of bus bar are evaluated: flat rectangular and rectangular with a restrictive region in the middle. ...

Iop Publishing Ltd2016

Coreless Open-Loop Current Transducers Based On Hall Effect Sensor Csa-1V

Radivoje Popovic

The paper provides an overview of coreless open-loop current transducers based on Hall effect sensor CSA-1V. Depending on the implementation method and current range, the presented transducers are divided in the four groups. The transducers are capable to ...

Univ Nis2016

Integrated Hall Magnetic Angle Sensors

Radivoje Popovic

A magnetic angle sensor is a matched combination of a permanent magnet, affixed to a rotating shaft, and a magnetic field sensor. The magnet part of the angle sensors is configured so as to create either a magnetic field with an angle-dependent component p ...

Soc Microelectronics, Electron Components Materials-Midem2014

High-speed CMOS magnetic angle sensor based on miniaturized circular vertical Hall devices

Radivoje Popovic, Mirjana Banjevic

We present a high-speed CMOS integrated magnetic angle sensor consisting of two 8-contact circular vertical Hall devices (CVHD). The biasing and sensing of the Hall voltage is rotated clockwise for the first device, and counter clockwise for the second one ...

2012

Offset compensation based on distributed Hall system architecture

Radivoje Popovic, Pavel Kejik

Integrated Hall devices have the great advantage, over other magnetic sensors, that they can be fully fabricated by a standard CMOS process. However they are known to have a relatively large offset (i.e. residual voltage at zero magnetic field). Techniques ...

2010

Ultra Low-Power Angular Position Sensor for High-Speed Portable Applications

Radivoje Popovic, Pavel Kejik

We present a technique for contactless angular position sensing that allows low power consumption while keeping dynamic properties comparable to existing sensors. The technique essentially consists in combining a recently developed sensing element, the so- ...

IEEE Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2009

Miniaturized Circular Vertical Hall Device

Radivoje Popovic, Mirjana Banjevic

A miniaturized circular vertical Hall device with 8 contacts was studied in terms of its sensitivity, biasing topologies and residual offset. The geometry accounts for about 30% lower sensitivity, but offers the possibility of biasing the whole device in a ...

2009

Magnetic field sensor measuring a direction of a magnetic field in a plane and current sensor

Radivoje Popovic, Mirjana Banjevic

A magnetic field sensor for measuring a direction of a magnetic field in a plane comprises two sensing structures (1A 1B) that can be operated as a rotating Hall element. The two Hall elements are rotated in discrete steps in opposite directions. Such a ma ...

2009

Integrated Magnetic Angle Sensors

Radivoje Popovic, Pavel Kejik, Mirjana Banjevic

2008

Semiconductor device for measuring ultra small electrical currents and small voltages

Radivoje Popovic, Marc Lany

A semiconductor device for measuring ultra low currents down to the level of single electrons or low voltages comprises a first and a second voltage supply terminal (1, 2), an input terminal (3) for receiving an electrical current or being supplied with a ...

2008

On performance of series connected CMOS vertical hall devices

Radivoje Popovic, Mirjana Banjevic

Series connected (stacked) CMOS vertical Hall devices were analyzed on the basis of performance of a single five contacts device biased at different common mode voltages with respect to the substrate. The uneven influence of junction field effect on residu ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2008

Counting single electrons in a CMOS circuit

Radivoje Popovic, Marc Lany

We describe a device compatible with CMOS technology, which permits to detect a single charge by multiplying it to an easily measurable level. The device is a bipolar transistor optimized for the operation in the Geiger avalanche mode. A single electron, i ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2008

Electron counting at room temperature in an avalanche bipolar transistor

Radivoje Popovic, Giovanni Boero, Marc Lany

We report on real-time detection of single electrons inside a n-p-n bipolar junction transistor at room temperature. Single electrons injected through the base-emitter junction trigger with a high probability the avalanche breakdown of the strongly reverse ...

2008

Horizontal HALL devices: A lumped-circuit model for EDA simulators

Radivoje Popovic, Predrag Drljaca

A completely scalable lumped-circuit model for horizontal HALL devices is presented therein that can be efficiently implemented in SPICE-like EDA simulators. The model has been employed for the quantitative analysis of: (a) geometrical, (b) temperature, an ...

2008

Purely CMOS Angular Position Sensor Based on a New Hall Microchip

Radivoje Popovic, Pavel Kejik

This paper presents a new technique to sense the direction of the magnetic field, enabling a new generation of contactless 360 degrees absolute angle encoders. The sensor consists of a microchip that contains a special ring-shaped Hall element. It is the f ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2008

Magnetic field sensor for measuring direction of a magnetic field in a plane

Radivoje Popovic, Pavel Kejik

A magnetic field sensor for measuring a direction of a magnetic field in a plane comprises a sensing structure (4) comprising a ring-shaped well (10), a plurality of contacts (11) of equal size placed at equal distance from each other along the ring-shaped ...

2008

Microfabricated solenoids and Helmholtz coils for NMR spectroscopy of mammalian cells

Pierre-André Besse, Radivoje Popovic, Florian Maria Wurm, Martin Jordan, Mathieu Benjamin Stettler, Franck Vincent, Klaus Ehrmann

NMR-microprobes based on solenoids and Helmholtz coils have been microfabricated and NMR-spectra of mammalian cells have successfully been taken. The microfabrication technology developed for these probes consists of three electroplated copper levels for l ...

2007

An orthogonal fluxgate-type magnetic microsensor with electroplated Permalloy core

Radivoje Popovic, Pavel Kejik, Ozge Zorlu

In this paper, we present a new microfabricated orthogonal fluxgate sensor tructure. The sensor consists of an electroplated copper excitation rod surrounded by an electroplated Permalloy layer and has planar pick-up coils for signal detection. The use of ...

Elsevier2007