Biography

Pavel Kejik received the diploma degree in 1994 and the Ph.D. degree in 1999 at the Czech Technical University of Prague. In 1999, he joined the Institute of Microelectronics and Microsystems at the EPFL to work on Institute's circuit design and testing. His research interests include fluxgate magnetometry and micro-Hall sensors combined with mixed-signal IC design and low-noise circuit design for industrial applications. Since 2014, Pavel is with Monolithic Power Systems company (the EPFL spin-off company Sensima Technology SA before acquisition) actively working on industrialization of magnetic sensors. He is inventor or co-inventor of several patents related to novel magnetic sensing structures and methods in the domain of contactless current measurement, angular sensing and non-destructive testing. He is giving a lecture devoted to recent developments in the field of smart Hall microsystems within the frame of a yearly Europractice course Smart sensor systems.

PHD STUDENTS

Past Phd students: Özge Zorlu

Research

Integrated sensor devices, interface electronics, and the system integration of sensors and electronics. - weak magnetic field detection with Hall effect, offset and offset drift cancellation techniques - scaling down of fluxgate sensors - techniques and methods of reducing 1/f noise and offset based on sampling - detection devices for NDT methods based on magnetic principles

Patents

[7] 2010-07-02, EP10168375, Hall sensor array [6] 2009-09-17, US20090108838, Method for determining geometric characteristics of an anomaly in a test object and measuring apparatus for carrying out the method [5] 2009-04-30, US20090230955, Orthogonal fluxgate magnetic field sensor [4] 2008-12-04, WO2008145662, , Magnetic field sensor for measuring direction of a magnetic field in a plane [3] 2006-07-20, WO2006074989, Hall sensor and method of operating a Hall sensor [2] 2002-06-11, US6404192, Integrated planar fluxgate sensor [1] 2000-11-15, EP1052519, Magnetic detector made on a semiconductive substrate

Publications

Books and book chapters: [1] R. S. Popovic, P. Kejik, Integrated Hall Magnetic Sensors, Chapter 9 in G. C. M. Meijer (ed.) Smart Sensor Systems, Wiley 2008, pp. 249-277. Journals: [13] P. Kejik, P.-F. Bourdelle, S. Reymond, F. Salvi, P.-A. Farine, "Offset Compensation Based on Distributed Hall Cell Architecture", IEEE Transactions on Magnetics, vol. 49, no. 1, January 2013, Pages 105-108 [12] P. Kejik, P. Drljaca, R. S. Popovic, "Integrated Hall Microsystem with Current Re-Use ", Sensor Letters, vol. 5, Number 1, March 2007, Pages 42-44 [11] D. Popovic, S. Dimitrijevic, M. Blagojevic, P. Kejik, E. Schurig, R. Popovic, "Three-Axis Teslameter with Integrated Hall Probe", IEEE Transactions on Instrumentation and Measurement, Volume 56, No 4, August 2007, Pages 1396-1402 [10] O. Zorlu, P. Kejik, R. S. Popovic, "An orthogonal fluxgate-type magnetic microsensor with electroplated Permalloy core ", Sensors and Actuators A: Physical, Volume 135, Issue 1, 30 March 2007, Pages 43-49 [9] P. Kejik, G. Boero, M. Demierre, R.S. Popovic,"An integrated micro-Hall probe for scanning magnetic microscopy",Sensors & Actuators A:Physical 129, 212-215 (2006) [8] P.M. Drljaca, F. Vincent, P. Kejik, R.S. Popovic,"Advanced process of the magnetic core integration for the micro fluxgate magnetometer",Sensors & Actuators A:Physical 129,58-61 (2006) [7] R.S. Popovic, P.M. Drljaca, P. Kejik, "CMOS magnetic sensors with integrated ferromagnetic parts",Sensors & Actuators A:Physical 129, 94-99 (2006) [6] P. Drljaca, P. Kejik, F. Vincent, D. Piguet, R. S. Popovic, "Low-power 2-D fully integrated CMOS fluxgate magnetometer", IEEE Sensors Journal, Vol. 5, No. 5, 2005, pp. 909-915 [5] G. Boero, I. Utke, T. Bret, N. Quack, M. Todorova, S. Mouaziz, P. Kejik, J. Brugger, R. S. Popovic, P. Hoffmann, "Submicrometer Hall devices fabricated by focused electron-beam-induced deposition", Applied Physics Letters, Vol 86, 2005, pp. 042503-1-042503-3 [4] P. Kejik, C. Kluser, R. Bischofberger and R.S. Popovic, "A low-cost inductive proximity sensor for industrial applications", Sensors & Actuators A:Physical, Vol. 110, 2004, pp 93-97. [3] P.M. Drljaca, P. Kejik, F. Vincent, D. Piguet, F. Gueissaz, R.S. Popovic, "Single core fully integrated CMOS micro-fluxgate magnetometer", Sensors & Actuators A:Physical, Vol. 110, 2004, pp 236-241. [2] P. Kejík, L. Chiesi, B. Janossy and R. S. Popovic, "A new compact 2D planar fluxgate sensor with amorphous metal core", Sensors and Actuators A: Physical, Volume 81, Issues 1-3, 1 April 2000, Pages 180-183 [1] L. Chiesi, P. Kejik, B. Janossy and R. S. Popovic, "CMOS planar 2D micro-fluxgate sensor", Sensors and Actuators A: Physical, Volume 82, Issues 1-3, 15 May 2000, Pages 174-180 Conference Proceedings: [29] P. Kejik, P.-F. Bourdelle, P.-A. Farine, Scaling Down Impact on a CMOS Hall Plate Device, 10th European Conference on Magnetic Sensors and Actuators, Vienna, Austria, July 6-9, 2014 [28] P. Kejik, P.-F. Bourdelle, S. Reymond, F. Salvi, P.-A. Farine, Layout and Architecture Issues in Hall based CMOS microsystems, 9th European Conference on Magnetic Sensors and Actuators, Prague, Czech rep., July 1-4, 2012 [27] P. Kejik, S. Reymond, B. Revaz, An Integrated Probe for Electromagnetic NDT Inspection, Magnetic Measurements 2010 conference, Prague, Czech republic, September 12-15, 2010 [26] P. Kejik, S. Reymond, G. Anelli, R. Popovic, Offset compensation based on distributed Hall system architecture, 8th European Conference on Magnetic Sensors and Actuators, Bodrum, Turkey, July 4-7, 2010 [25] O. Zorlu, P. Kejik, W. Teppan, Micro Fluxgate Sensor with Cascaded Planar Ring Cores, Eurosensors XXIII, Lausanne, Switzerland, September 6-9, 2009 [24] P. Kejik, S.Reymond, and R.S.Popovic, Ultra low-power angular position sensor for high-speed portable applications, IEEE Sesors 2009 Conference, Christchurch, New Zeland, October 25-28, 2009 [23] P.Kejik, S. Reymond, and R.S. Popovic, Purely CMOS Angular Position Sensor Based on a New Hall Microchip, proceedings of The 34th Annual Conference of the IEEE Industrial Electronics Society, IECON'08, Orlando, Florida, USA, 10-13 November 2008 [22] R. S. Popovic, S. Reymond, P. Kejik, M. Banjevic, Integrated Magnetic Angle Sensors, Invited Paper, 31st International Conference MIPRO, May 26-30, 2008, Opatija, Croatia [21] S. Reymond, P. Kejik, and R.S. Popovic, "True 2D CMOS integrated Hall sensor ", IEEE SENSORS 2007 Conference, October 28-31, 2007, Atlanta, Georgia, USA, Book of abstracts, Pages 860-863 [20] R. Popovic, P. Kejik, S. Reymond, D. Popovic, M. Blagojevic, S. Dimitrijevic, "Multi-axis integrated Hall magnetic sensors", plenary invited talk at 51st Conference for Electronics, Telecommunications, Computers, Automatic control and Nuclear engineering (ETRAN) conference, Herceg Novi - Igalo, June 4 - 8, 2007, Serbia and Montenegro [19] P. Kejik, S. Reymond, R. S. Popovic, "Circular Hall transducer for angular position sensing ", Transducers '07 & Eurosensors XXI conference, June 10-14, 2007, Lyon, France, Digest of technical papers vol. 2, Pages 2593-2596 [18] O. Zorlu, P. Kejik, R. S. Popovic, "Investigation of Giant-Magneto-Impedance (GMI) effect and magnetic hysteresis in microfabricated Permalloy/Coper device ", Transducers '07 & Eurosensors XXI conference, June 10-14, 2007, Lyon, France, Digest of technical papers vol. 2, Pages 2577-2580 [17] O. Zorlu, P. Kejik, R. S. Popovic, "Fluxgate-type magnetic microsensors for wide linear measuring range ", Sensors and Applications Symposium (SAS07), San Diego CA,USA, 6-8th February 2007 [16] D. Popovic, S. Dimitrijevic, M. Blagojevic, P. Kejik, E. Schurig, R.S. Popovic,"Three-axis teslameter with integrated Hall probe free from the planar Hall effect",Proceedings of IMTC 2006, IEEE Instrumentation and Measurement Technoloy Conference, Sorrento [15] O. Zorlu, P. Kejik, F. Vincent, R. S. Popovic, "An Orthogonal Fluxgate-Type Magnetic Microsensor", MEMS06, Istanbul, Turkey, 22-26th January 2006, pp: 646-649 [14] P. Kejik P. Drljaca, R. S. Popovic, "New approach to Hall microsystem configuration", EMSA 2006, Bilbao, Spain, July 3-5, 2006, Abstracts Book pp. 30 [13] P. Kejik E. Schurig, F. Bergsma, R. S. Popovic, "First Fully CMOS-Integrated 3D Hall Probe", Transducers 05, Seoul, Korea, June, 2005, pp. 317-320 [12] D. Popovic, S. Dimitrijevic, M. Blagojevic, P. Kejik, E. Schurig, R. Popovic, Three-axis teslameter with integrated hall probe free from the planar hall effect, Instrum. Measurement Technol. Conf. (IMTC), Sorrento, Italy, Apr. 24-27, 2006 [11] O. Zorlu, P. Kejik, F. Vincent, R. S. Popovic, "A novel planar magnetic sensor based on orthogonal fluxgate principle ", IEEE PRIME’05 Conf. Lausanne, Switzerland, July 2005 [10] P. Kejik, G. Boero, M. Demierre and R.S. Popovic "An Integrated Micro-Hall Probe for Scanning Magnetic Microscopy", The European Magnetic Sensors and Actuators Conference, EMSA 2004, Cardiff, UK, 4-7 July, 2004 [9] P. Kejik, M. Blagojevic and R.S. Popovic, "A micro-Hall probe - integrated versus discrete solution", Magnetic Measurements 2004 Conference, Prague, Czech Republic, June 30 - July 2, 2004 [8] P.M. Drljaca, F. Vincent, P. Kejik, R.S. Popovic "Advanced process of the magnetic core integration for the micro fluxgate magnetometer", The European Magnetic Sensors and Actuators Conference, EMSA 2004, Cardiff, UK, 4-7 July, 2004 [7] R.S. Popovic, P.M. Drljaca, P. Kejik "CMOS Magnetic Sensors with Integrated Ferromagnetic Parts", Invited Lecture, The European Magnetic Sensors and Actuators Conference, EMSA 2004, Cardiff, UK, 4-7 July, 2004 [6] P. M. Drljaca, P. Kejik, F. Vincent, and R. S. Popovic, "Low Noise CMOS Micro-Fluxgate Magnetometer", Transducers'03, Boston, MA, USA, June 8-12-4 2003, pp. 304-307. [5] P. Kejik, C. Kluser, R. Bischofberger and R. S. Popovic, "A low-cost inductive proximity sensor for industrial applications", Proc. 16th Eurosensors Conference, Prague, Czech Republic, pp. 866-867., 15-18 Sept. 2002 [4] P. M. Drljaca, P. Kejik, F. Vincent, D. Piguet, Gueissaz and R. S. Popovic, "Single Core Fully Integrated CMOS Micro-Fluxgate Magnetometer", Proc. 16th Eurosensors Conference, Prague, Czech Republic, pp. 570-572., 15-18 Sept. 2002 [3] L. Chiesi, P. Kejik, B. Janossy, R.S. Popovic, "CMOS planar 2D micro-fluxgate sensor", Transducers '99 proceedings, 1999, Sendai (Japan),vol. 1, pp. 160-163 [2] P. Kejik, L Chiesi, B. Janossy, R.S. Popovic, "A new compact 2D planar fluxgate sensor with amorphous metal core", EMSA '98 proceedings, Sheffield (UK), pp.63-6 [1] P. Ripka, P. Kejik, P. Kaspar, K. Draxler, "Precise DC current sensors", IEEE Instrumentation and Measurement Technology Conference, Brussels, Belgium. June 4-6, 1996, pp. 1479-1483