Dr. John Stensby

Professor Emeritus, ECE


301 Sparkman Drive
Huntsville, AL 35899
Campus Map



  • Ph.D., Texas A&M University, College Station, TX, 1981
  • M.S.E., The University of Alabama in Huntsville, 1976
  • B.S.E.E., The University of Alabama, Tuscaloosa, AL, 1972

Honors & Awards

  • IEEE Outstanding Educator Award 1995 (IEEE Huntsville Section)
  • Wernher Von Braun Faculty Fellow (1984-1986)


  • Communications Theory and Systems
  • Phase Lock Techniques and Synchronization Methods/Theory
  • Radio Frequency (RF) Design
  • Applied Mathematics

Recent Publications

  • J. P. Lanza, Y. Shtessel, J. Stensby, Improved acquisition in a phase-locked loop using sliding mode control techniques, Vol. 352, Issue 10, October 2015, pp. 4188–4204.

  • P. Lanza, J. Stensby, Y. Shtessel, An Exact Formula for the Maximum VCO Sweep Rate of a PLL Journal of the Franklin Institute, Sept. 2014 (Issue 351), pp. 4495-4513.

  • A. Huque, J. Stensby, An Analytical Approximation to Pull-out Frequency of a PLL Employing Sinusoidal Phase Detector, ETRI Journal, Vol. 35, no.2, April 2013.

  • J. Stensby, PLL Bifurcation Analysis via Smooth Periodic Extension, 44th Symposium on System Theory, Jacksonville, FL, March 2012.

  • A. Huque, J. Stensby, An Exact Formula for the Pull-Out Frequency of a 2nd-Order Type II Phase Lock Loop, IEEE Communications Letters, Vol. 15, No. 12, Dec. 2011.

  • J. Stensby, An Exact Formula for the Half-Plane Pull-In Range of a PLL, Journal of the Franklin Institute, Vol. 348, Issue 4, May 2011.