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Philip R. Troyk, Ph.D.

Philip R. Troyk
Associate Dean of Armour College of Engineering
Professor of Biomedical Engineering
Professor, Stuart School of Business


3255 S Dearborn St., Wishnick Hall, Room 214-217







Ph.D., University of Illinois, Chicago
M.S., BioEngineering, University of Illinois, Chicago
B.S., Electrical Engineering, University of Illinois, Urbana


Neural Interfaces, Neural prostheses, Implantable Electronic Devices


Design of implantable electronic devices and systems to act as neural interfaces. The interfaces provide communication to, and from, the central and peripheral nervous system for the purposes of compensating for neuromuscular deficit and disease.

Current Projects

Intracortical Visual Prosthesis – A system of modules to be implanted into the brain for restoration of visual sensation for people with blindness.  The micro-sized wireless implanted devices communicate image information directly to the brain.

Sensors for Prosthetic Limb Control -  Implantable myoelectric sensors (IMES) for sensing motor commands to control prosthetic limbs.  The wireless grain-of-rice sized sensors transmit muscle commands directly to an artificial limb.

Bioelectronic Medicine Interfaces – Devices that provide sensing, stimulation, and blocking of autonomic peripheral nerves in order to act as a substitute for pharmacological-based therapies.  The neural activity is modulated to facilitate improved organ function for diseases such as hypertension, incontinence, asthma, and chronic pain.


Composite Polymer Coatings for IC Encapsulation #4,939,014

Composite polymer/Desiccant coatings for IC Encapsulation #4,977,009

Composite polymer/Desiccant coatings for IC Encapsulation #5,108,784

Self-regulating Class E Resonant Power Converter Maintaining Operation in a Minimal Loss Region #5,179,511

Electromagnetic Energy Transmission and Detection Apparatus #5,012,236

Method and apparatus for modulating and detecting a subcarrier signal for an inductively coupled transponder  #5,095,309

Method and apparatus for producing a subcarrier signal for transmission by an inductively coupled transponder #5,198,807

Automated method for the manufacture of small implantable transponder devices #5,025,550

Automated method for the manufacture of small implantable transponder devices #5,050,292

Implantable microstimulator  #5,193,539

Implantable microstimulator #5,324,316

Suspended carrier modulation of high-Q transmitters #5,697,076

Inductive data and power link suitable for integration #7,271,677

Wireless Recording and Stimulation of Brain Activity #8,849,369


Founder, President, CEO, of Sigenics, Inc, a microelectronics design and manufacturing company located in the University Technology Park


Fellow of AIMBE

Fellow, Institute of Physics

IEE (London) V.K. Zworkin Premium

Sigma Xi Chicago Area Regional Award Recipient

Alfred Mann Foundation Award for Scientific Achievement

Engineering Excellence Award, Northrop Corporation D.S.D.

National Honor Society of Phi Kappa Phi

Professional Society Memberships 


Biomedical Engineering Society

International Functional Stimulation Society (Board of Directors)

Alliance for Innovations in Neural Technology

American Society of Agricultural and Biological Engineers

Association for Research in Vision and Ophthalmology

ACS American Chemical Society

MRS membership

International Society of Hybrid Manufacturers

Society for the Advancement of Material and Process Engineering


  1. P. R. Troyk and M. A. K. Schwan, "Closed-loop class-E transcutaneous power and data link for microimplants," IEEE Transactions on Biomedical Engineering, vol. 39, pp. 589-599, Jun 1992.
  2. P. R. Troyk, "Injectable electronic identification, monitoring, and stimulation systems," Annual Review of Biomedical Engineering, vol. 1, pp. 177-209, 1999.
  3. P. R. Troyk and M. A. Schwan, "Class-E driver for transcutaneous power and data link for implanted electronic devices," Medical & Biological Engineering & Computing, vol. 30, pp. 69-75, Jan 1992.
  4. T. Cameron, G. E. Loeb, R. A. Peck, J. H. Schulman, P. Strojnik, and P. R. Troyk, "Micromodular implants to provide electrical stimulation of paralyzed muscles and limbs," IEEE Transactions on Biomedical Engineering, vol. 44, pp. 781-790, Sep 1997.
  5. P. Troyk, T. Bak, J. Berg, D. Bradley, S. Cogan, R. Erickson, et al., "A model for intracortical visual prosthesis research," Artificial Organs, vol. 27, pp. 1005-1015, Nov 2003.
  6. S. F. Cogan, P. R. Troyk, J. Ehrlich, and T. D. Plante, "In vitro comparison of the charge-injection limits of activated iridium oxide (AIROF) and platinum-iridium microelectrodes," IEEE Transactions on Biomedical Engineering, vol. 52, pp. 1612-1614, Sep 2005.
  7. R. E. F. Weir, P. R. Troyk, G. A. DeMichele, D. A. Kerns, J. F. Schorsch, and H. Maas, "Implantable Myoelectric Sensors (IMESs) for Intramuscular Electromyogram Recording," IEEE Transactions on Biomedical Engineering, vol. 56, pp. 159-171, Jan 2009.
  8. D. McCreery, V. Pikov, and P. R. Troyk, "Neuronal loss due to prolonged controlled-current stimulation with chronically implanted microelectrodes in the cat cerebral cortex," Journal of Neural Engineering, vol. 7, Jun 2010.
  9. Troyk, P.; Hu, Z., "Simplified Design Equations for Class-E Neural Prosthesis Transmitters," IEEE Transactions on Biomedical Engineering, vol.60, no.5, pp.1414-1421, May 2013