Papers and Patents

Latest Research

Refereed Papers

  1. Open Source PDF : Christopher G. Daniel, Jr. and Thomas P. Weldon, ``A Stable Digital Impedance Circuit Design Method for Resistive Source Impedances,'' in IEEE Open Journal of Circuits and Systems, vol. 3, pp. 109-114, 2022, doi: 10.1109/OJCAS.2022.3174694. IEEE weblink.

  2. PDF Preprint: Thomas P. Weldon, Christopher G. Daniel Jr., and Kathryn L. Smith, ``Gravitomagnetic Dipole Moment of Gravitational Unit Cells,'' in 14th International Congress on Artificial Materials for Novel Wave Phenomena - Metamaterials 2020 , NY, NY (online), Sep. 28 - OCT 3, 2020. IEEE weblink.

  3. PDF Preprint: Thomas P. Weldon, ``A Digital Non-Foster VHF Radio Approach for Enabling Low-Power Internet of Things,'' in 2020 IEEE International Symposium on Circuits and Systems (ISCAS 2020), , Seville, Spain, Oct. 11-14, 2020. IEEE weblink.

  4. PDF Preprint: Kristy A. Hecht, Christopher G. Daniel Jr., and Thomas P. Weldon, ``Effect of External Source Impedance on the Input Impedance of Digital Impedance Circuits,'' in 2020 IEEE International Symposium on Circuits and Systems (ISCAS 2020), , Seville, Spain, Oct. 11-14, 2020. IEEE weblink.

  5.  PDF preprint: Thomas P. Weldon and Kathryn L. Smith, "Gravitationally-Small Gravitational Antennas, the Chu Limit, and Exploration of Veselago-Inspired Notions of Gravitational Metamaterials," in 13th International Congress on Artificial Materials for Novel Wave Phenomena - Metamaterials 2019 , Rome, Italy, Sep. 16-21, 2019.

  6.  PDF preprint: Thomas P. Weldon and Kathryn L. Smith, "Comparison of Electromagnetic Antenna Chu Limit and Q of Gravitational Radiators," in International Conference on Electromagnetics in Advanced Applications (ICEAA 2019), Granada, Spain, Sep. 9-13, 2019.

  7.  PDF preprint: Kathryn L. Smith and Thomas P. Weldon, "Electromagnetic Education Module: Introductory Transmission Line Simulation and Experiment," in International Conference on Electromagnetics in Advanced Applications (ICEAA 2019), Granada, Spain, Sep. 9-13, 2019.

  8.  PDF published in online proceedings: Thomas P. Weldon and Kathryn L. Smith, "Much Ado About Nothing: Applying a Metamaterial Model with Negative Energy to Address the Vacuum Catastrophe," in META 2019, the 10th International Conference on Metamaterials, Photonic Crystals and Plasmonics, Lisbon, Portugal, July 23-26, 2019.

  9.  PDF preprint: Christopher G. Daniel Jr., Kathryn L. Smith, and Thomas P. Weldon, "Observed Q and Gravitationally-Small Antenna Behavior of a Binary Black Hole Radiator," in 2019 IEEE International Symposium on Antennas and Propagation (APSURSI),, Atlanta, GA, July 7-12, 2019.

  10.  PDF preprint: Vinit A. Katariya and Thomas P. Weldon, "Search-Based Design of Digital Non-Foster Antenna Match for High-Speed Low-Impedance Converters," in 2019 IEEE International Symposium on Antennas and Propagation (APSURSI), , Atlanta, GA, July 7-12, 2019.

  11. this PDF is © American Physical Society. (https://www.aps.org/) :
    Thomas P. Weldon, ``Theoretical and observed quality factor of gravitational quadrupoles,'' in Phys. Rev. D, vol. 98, p. 124044, Dec. 2018. APS weblink.
    ("Yes, the author or the author's employer may use all or part of the APS published article, including the APS-prepared version (e.g., the PDF from the online journal) without revision or modification, on the author's or employer's website as long as a fee is not charged.")

  12.  PDF preprint: Thomas P. Weldon, ``Use of a Digital Non-Foster Radio Architecture for Conventional Tuning of Electrically-Small Antennas,'' in 2018 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting, Boston, MA, July 8-13, 2018.   IEEEweblink to paper.

  13.  PDF preprint: Thomas P. Weldon, ``Measured and Field-Based Theoretical Q of Gravitationally-Small Gravitational Antennas,'' in 2018 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting, Boston, MA, July 8-13, 2018.  IEEEweblink to paper.

  14.  PDF preprint: Thomas P. Weldon, Patrick J. Kehoe, and Killian K. Steer, ``Bilinear Transform Approach for Wideband Digital Non-Foster Matching of Electrically-Small Antennas,'' in 2018 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting, Boston, MA, July 8-13, 2018. IEEEweblink to paper.

  15.  PDF preprint:  Thomas P. Weldon, Patrick J. Kehoe, and Killian K. Steer, ``A Clock-Tuned Digital Memristor Emulator,'' 2018 IEEE International Symposium on Circuits and Systems (ISCAS 2018), Florence, Italy, May 27-30, 2018.   IEEEweblink to paper.

  16.  PDF preprint:  Donald M. Johnson and Thomas P. Weldon, ``A Clock-Tuned Discrete-Time Negative Capacitor Implemented Using Analog Samplers,'' 2018 IEEE International Symposium on Circuits and Systems (ISCAS 2018), Florence, Italy, May 27-30, 2018. IEEEweblink to paper.

  17.  PDF preprint:  Sunny Arokia Swamy Bellary, Nelyadi S. Shetty, Ryan C. Hill, Thomas P. Weldon and James M. Conrad, ``Investigation of a Digital Non-Foster RC Circuit Using Pade and Prony Approximations,'' 2018 IEEE International IEEE SoutheastCon 2018 Proceedings, Tampa, FL, April 19-22, 2018. 

  18.  PDF preprint: Killian K. Steer, Patrick J. Kehoe, and Thomas P. Weldon, "Investigation of an Adaptively-Tuned Digital Non-Foster Approach for Impedance Matching of Electrically-Small Antennas," IEEE SoutheastCon 2017 Proceedings, Charlotte, NC, Mar. 31 - Apr. 2, 2017.  IEEEweblink to paper.

  19.  PDF preprint: Patrick J. Kehoe, Killian K. Steer, and Thomas P. Weldon, "Measurement of a Clock-Tuned Digital Non-Foster Circuit for Positive or Negative Digital Capacitance," IEEE SoutheastCon 2017 Proceedings, Charlotte, NC, Mar. 31 - Apr. 2, 2017.  IEEEweblink to paper.

  20.  PDF preprint: Killian K. Steer, Patrick J. Kehoe, and Thomas P. Weldon, "Measurement of a Digital Non-Foster Negative RLC Circuit and Digital Positive RLC Circuit," IEEE SoutheastCon 2017 Proceedings, Charlotte, NC, Mar. 31 - Apr. 2, 2017. IEEEweblink to paper.

  21.  PDF preprint: Patrick J. Kehoe, Killian K. Steer, and Thomas P. Weldon, "Stability Analysis and Measurement of RC and RL Digital Non-Foster Circuits with Latency," IEEE SoutheastCon 2017 Proceedings, Charlotte, NC, Mar. 31 - Apr. 2, 2017. IEEEweblink to paper.

  22.  PDF preprint: Kathryn L. Smith, J. Luke Stuemke, Ryan S. Adams, and Thomas P. Weldon, "A Digital Non-Foster Fast-Wave Line Using an Internet of Things Approach for Software Tuning of Multiple Digital Negative Capacitors," IEEE SoutheastCon 2017 Proceedings, Charlotte, NC, Mar. 31 - Apr. 2, 2017. IEEEweblink to paper.

  23.  PDF preprint: Patrick J. Kehoe, Killian K. Steer, and Thomas P. Weldon, ``Thevenin Forms of Digital Discrete-Time Non-Foster RC and RL Circuits,''  2016 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting, Fajardo,Puerto Rico, June 26- July 1, 2016. IEEEweblink to paper.

  24.  PDF preprint: Killian K. Steer, Patrick J. Kehoe, and Thomas P. Weldon, ``Effects of Latency and Quantization Noise on Digital Discrete-Time Non-Foster Circuits,'' 2016 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting, Fajardo, Puerto Rico, June 26- July 1, 2016.   IEEEweblink to paper.

  25.  PDF preprint: Kathryn L. Smith, Ryan S. Adams, and Thomas P. Weldon, ``Measurement of a Fast-Wave Line Using Digital Non-Foster Circuits for Software-Adjustable Delay,''  2016 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting, Fajardo, Puerto Rico, June 26- July 1, 2016.   IEEEweblink to paper. 

  26.  PDF preprint: Tyler C. Major, Kona Pranay Shekhar, James M. Conrad, and Thomas P. Weldon, ``Simulation and Measurement of an Internet of Things Implementation of a Programmable Digital Inductor,''  IEEE SoutheastCon 2016 Proceedings, pp. 1-4, Norfolk, VA, Mar. 30 - Apr. 3, 2016.   IEEEweblink to paper.

  27.  PDF preprint: Thomas P. Weldon, John M. C. Covington III, Kathryn L. Smith, and Ryan S. Adams, ``A Two-Port Digital Discrete-Time Non-Foster Circuit Designed for Negative Capacitance,'' Ninth International Congress on Advanced Electromagnetic Materials in Microwaves and Optics – Metamaterials 2015 , Oxford, United Kingdom, Sep. 7-10, 2015. IEEEweblink to paper. 

  28.  PDF preprint: Thomas P. Weldon and Ryan S. Adams, ``Digital Discrete-Time Non-Foster Approach to Broadband Fast-Wave Microstrip Lines,'' Ninth International Congress on Advanced Electromagnetic Materials in Microwaves and Optics – Metamaterials 2015 , Oxford, United Kingdom, Sep. 7-10, 2015. IEEEweblink to paper. 

  29.  PDF preprint: Thomas P. Weldon, John M. C. Covington III, Kathryn L. Smith, and Ryan S. Adams, ``Stability Conditions for a Digital Discrete-Time Non-Foster Circuit Element,'' 2015 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting, Vancouver, BC, Canada, July 19-25, 2015. IEEEweblink to paper. 

  30.  PDF preprint: Kathryn L. Smith, Thomas P. Weldon, and Ryan S. Adams, ``Measurement, Simulation, and Theory of a Non-Foster Metamaterial Unit Cell with Parasitic Resistance,'' 2015 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting, Vancouver, BC, Canada, July 19-25, 2015. IEEEweblink to paper. 

  31.  PDF preprint:  Thomas P. Weldon, John M. C. Covington III, Kathryn L. Smith, and Ryan S. Adams ``Performance of Digital  Discrete-Time Implementations of Non-Foster Circuit Elements,''  2015 IEEE International Symposium on Circuits and Systems (ISCAS 2015), Lisbon, Portugal, May 24-27, 2015. IEEEweblink to paper. 

  32.  PDF preprint: Kathryn L. Smith, Ryan S. Adams, and Thomas P. Weldon, ``A Novel Broadband Fractal Metamaterial Unit Cell,''  2014 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting , Memphis, TN, July 6–12, 2014.   IEEEweblink to paper. 

  33. Joshua W. Shehan, Ryan S. Adams, and Thomas P. Weldon, ``Metamaterial Measurement in a Cylindrical Coaxial Fixture with Consideration for Inter-Element Coupling,''  2014 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting , Memphis, TN, July 6–12, 2014.   IEEEweblink to paper.

  34. PDF preprint : Varun S. Kshatri, John M. C. Covington III, Kathryn L. Smith, Joshua W. Shehan, Thomas P. Weldon, and Ryan S. Adams ``Measurement and Simulation of a CMOS Current Conveyor Negative Capacitor for Metamaterials,'' IEEE SoutheastCon 2014 Proceedings , pp. 1-4, Lexington, KY, Mar. 13-16, 2014.   IEEEweblink to paper.

  35. PDF preprint : John M. C. Covington III, Kathryn L. Smith, Joshua W. Shehan, Varun S. Kshatri, Thomas P. Weldon, and Ryan S. Adams ``Measurement of a CMOS Negative Inductor for Wideband Non-Foster Metamaterials,''  IEEE SoutheastCon 2014 Proceedings , pp. 1-4, Lexington, KY, Mar. 13-16, 2014.   IEEEweblink to paper.

  36. PDF preprint : John M. C. Covington III, Kathryn L. Smith, Varun S. Kshatri, Joshua W. Shehan, Thomas P. Weldon, and Ryan S. Adams ``A Cross-Coupled CMOS Negative Capacitor for Wideband Metamaterial Applications,''  IEEE SoutheastCon 2014 Proceedings , pp. 1-4, Lexington, KY, Mar. 13-16, 2014.   IEEEweblink to paper.

  37. PDF preprint : Varun S. Kshatri, John M. C. Covington III, Thomas P. Weldon, and Ryan S. Adams ``Compensation of Frequency Dependent Parasitic Resistance in a CMOS Linvill Negative Inductor,'' to IEEE SoutheastCon 2014 Proceedings , pp. 1-4, Lexington, KY, Mar. 13-16, 2014.   IEEEweblink to paper.

  38. PDF preprint : John M. C. Covington III, Varun S. Kshatri, Thomas P. Weldon, and Ryan S. Adams ``Parasitic Resistance in Non-Foster Circuits Caused by Current Conveyor Frequency Response,'' IEEE SoutheastCon 2014 Proceedings , pp. 1-4, Lexington, KY, Mar. 13-16, 2014.   IEEEweblink to paper.

  39. PDF preprint : Sam L. Shue, Andrew R. Willis, and Thomas P. Weldon ``HubVis: Software for Gravitational Lens Estimation and Visualization from Hubble Data,''IEEE SoutheastCon 2014 Proceedings , pp. 1-4, Lexington, KY, Mar. 13-16, 2014.  IEEEweblink to paper.

  40. PDF preprint: Thomas P. Weldon, Ryan S. Adams,and Joshua W. Shehan, ``Stability of Embedded Non-Foster Metamaterials with Potentially Unstable Circuit Parameters,''   Seventh International Congress on Advanced Electromagnetic Materials in Microwaves and Optics – Metamaterials 2013 , Bordeaux, France, Sept. 16-19, 2013.  IEEEwebLink to paper.

  41. PDF preprint : Joshua W. Shehan, John M. C. Covington III, Varun S. Kshatri, Thomas P. Weldon, Ryan S. Adams, ``Permeability and Permittivity Extraction Issues For Non-Foster and Active Metamaterials,''  2013 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting , Orlando, FL, July 7-13, 2013.    IEEEwebLink to paper.

  42. PDF preprint : Joshua W. Shehan, Ryan S. Adams, Thomas P. Weldon, ``A Coaxial Test Fixture for Transmission/Reflection Measurements of Metamaterials,'' 2013 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting , Orlando, FL, July 7-13, 2013.    IEEEwebLink to paper.

  43. PDF preprint : Varun S. Kshatri, John M. C. Covington III, Joshua W. Shehan, Thomas P. Weldon, Ryan S. Adams, ``Comparison of CMOS Current Conveyor Circuits for Non-Foster Applications,''  IEEE SoutheastCon 2013 Proceedings , pp. 1-4, Jacksonville, FL, April 4-7, 2013.  IEEEwebLink to paper.

  44. PDF preprint : Varun S. Kshatri, John M. C. Covington III, Joshua W. Shehan, Thomas P. Weldon, Ryan S. Adams, ``A DC-Coupled Negative Inductance Circuit with Integrated Bias,''  IEEE SoutheastCon 2013 Proceedings , pp. 1-4, Jacksonville, FL, April 4-7, 2013.  IEEEwebLink to paper.

  45. PDF preprint : Varun S. Kshatri, John M. C. Covington III, Joshua W. Shehan, Thomas P. Weldon, Ryan S. Adams, ``Capacitance and Bandwidth Tradeoffs in a Cross-Coupled CMOS Negative Capacitor,''  IEEE SoutheastCon 2013 Proceedings , pp. 1-4, Jacksonville, FL, April 4-7, 2013.  IEEEwebLink to paper.

  46. PDF preprint : Konrad Miehle, Thomas P. Weldon, Ryan S. Adams, and Kasra Daneshvar, ``Wideband Negative Permeability Metamaterial with Non-Foster Compensation of Parasitic Capacitance,'' 2012 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting , Chicago, IL, July 8-14, 2012.  IEEEwebLink to paper.

  47. PDF preprint : Thomas P. Weldon, Konrad Miehle, Ryan S. Adams, and Kasra Daneshvar, ``A Wideband Microwave Double-Negative Metamaterial with Non-Foster Loading,'' IEEE SoutheastCon 2012 Proceedings , pp. 1-4, Orlando, FL, March 15-18, 2012.  IEEEwebLink to paper.

  48. PDF preprint : Thomas P. Weldon, Konrad Miehle, Ryan S. Adams, and Kasra Daneshvar, ``Simulation, Measurement, and Parameter Extraction for a 5.8 GHz Negative Permittivity Metamaterial,'' IEEE SoutheastCon 2012 Proceedings , pp. 1-4, Orlando, FL, March 15-18, 2012.  IEEEwebLink to paper.

  49. PDF preprint : Thomas P. Weldon, Ryan S. Adams, and Kasra Daneshvar, ``Gaussian Models for Observed Dispersion in High Redshift Gamma Ray Bursts,'' IEEE SoutheastCon 2012 Proceedings , pp. 1-4, Orlando, FL, March 15-18, 2012.  IEEEwebLink to paper.

  50. PDF preprint : Raghu K. Mulagada, Yi Yang, Thomas P. Weldon, and Don T. Lieu, ``Single Chip Spectrum Sensing Module in CMOS with Digital Frequency Synthesizer and Digital Output,'' IEEE SoutheastCon 2012 Proceedings , pp. 1-4, Orlando, FL, March 15-18, 2012.  IEEEwebLink to paper.

  51. Don Lieu and Thomas P. Weldon, ``A 10MHz Continuous Time Bandpass Delta Sigma Modulator,'' IEEE SoutheastCon 2012 Proceedings , pp. 1-4, Orlando, FL, March 15-18, 2012.

  52. PDF preprint : Thomas P. Weldon, Ryan S. Adams, Kasra Daneshvar, and Raghu K. Mulagada, ``Metamaterials, Gamma-Ray Bursts, Quantum Gravity, and the Search for the Missing Half of the Maxwell Equations,'' 2011 IEEE International Microwave Symposium (IMS 2011) , Baltimore, MD, June 2011. IEEEwebLink to paper. 

  53. PDF preprint : T. P. Weldon, R. S. Adams, and R. K. Mulagada, ``A novel unit cell and analysis for epsilon negative metamaterial,'' IEEE SoutheastCon 2011 Proceedings , pp. 211-214, Nashville, TN, March 2011.  IEEEwebLink to paper.

  54. PDF preprint : T. P. Weldon, R. S. Adams, K. Daneshvar, and R. K. Mulagada, ``Prospective gamma-ray propagation models and comparisons to metamaterial models,'' IEEE SoutheastCon 2011 Proceedings , pp. 207-210, Nashville, TN, March 2011. IEEEwebLink to paper.

  55. PDF preprint : D.T. Lieu and T. P. Weldon, ``Simulation of Simple Delta-Sigma Modulator for Driving Class C RF Amplifiers,'' IEEE SoutheastCon 2011 Proceedings , pp. 228-231, Nashville, TN, March 2011.  IEEEwebLink to paper.

  56. See abstract : Shahab Chitchian, Thomas P. Weldon, Michael A. Fiddy, and Nathaniel M. Fried, ``Combined image processing algorithms for improved optical coherence tomography of prostate nerves,'' Journal of Biomedical Optics , vol. 15, no. 4, pp. 046014-1 - 046014-6, July/August 2010 .

  57. PDF preprint : Thomas P. Weldon, Ryan S. Adams, Kasra Daneshvar, and Raghu K. Mulagada, ``Left-Handed Extensions of Maxwell's Equations for Metamaterials,'' IEEE SoutheastCon 2010 Proceedings , pp. 489-492, Charlotte, NC, March 18-21, 2010.  IEEEwebLink to paper.

  58. PDF preprint : Raghu Mulagada and Thomas P. Weldon, ``A Delay Line Discriminator for IFM Using a Left-Handed Delay Line,'' IEEE SoutheastCon 2010 Proceedings , pp. 185-188, Charlotte, NC, March 18-21, 2010.  IEEEwebLink to paper.

  59. PDF preprint : Payam Shoghi, Christopher J. Barnwell, Raghu Mulagada, and Thomas P. Weldon, ``A Prototype Single-Chip Spectrum Analyzer with Integrated Frequency-Synthesized Tuning,'' IEEE SoutheastCon 2010 Proceedings , pp. 45-48, Charlotte, NC, March 18-21, 2010.  IEEEwebLink to paper.

  60. Shahab Chitchian, Thomas P. Weldon, and Nathaniel M. Fried, ``OCT image segmentation for differentiation of the cavernous nerves from the prostate gland,'' Proceedings of SPIE , Vol. 7443, pp.74431D1-74431D4, August 2009.  SPIEweblink to paper.

  61. See abstract : Shahab Chitchian, Thomas P. Weldon, and Nathaniel M. Fried, ``Segmentation of Optical Coherence Tomography Images for Differentiation of the Cavernous Nerves from the Prostate Gland,'' Journal of Biomedical Optics , vol. 14, no. 4, pp. 044033-1 - 044033-4, July/August 2009.  SPIEweblink to paper.

  62. PDF preprint : T. P. Weldon, ``Rayleigh and Mie Enhancement of Blackbody Radiation in Nanoscale Devices,'' IEEE SoutheastCon 2009 Proceedings pp. 216-220,, Atlanta, GA, March 2009.  IEEEwebLink to paper.

  63. PDF preprint : P. Shoghi, C.J. Barnwell, T. P. Weldon, ``Experimental Results for a Successive Detection Log Video Amplifier in a Single- Chip Frequency Synthesized Radio Frequency Spectrum Analyzer,'' IEEE SoutheastCon 2009 Proceedings , Atlanta, GA, pp. 379-382, March 2009.  IEEEweblink to paper.

  64. PDF preprint : T. P. Weldon, Geng Ye, Raghu K. Mulagada ``Linearization Conditions for Two and Four Stage Circuit Topologies Including Third Order Nonlinearities,'' IEEE SoutheastCon 2009 Proceedings , Atlanta, GA, pp. 362-366, March 2009.  IEEEweblink to paper.

  65. PDF preprint : P. Shoghi, C.J. Barnwell, T. P. Weldon, ``Experimental Results for an Inductively Matched Microwave Amplifier in a Standard 0.5 Micron CMOS Process Using Four Identical Spiral Inductors,'' IEEE SoutheastCon 2008 Proceedings , Huntsville, AL, April 2008.

  66. PDF preprint : T. P. Weldon, ``Removal of Image Segmentation Boundary Errors Using an N-ary Morphological Operator,'' IEEE SoutheastCon 2007 Proceedings , pp. 509-513, Richmond, VA, March 2007.

  67. PDF preprint : D. T. Lieu and T. P. Weldon, ``Reduced Current Class AB Radio Receiver Stage Using Novel Superlinear Transistors with Parallel NMOS and PMOS Transistors at One GHz,'' IEEE SoutheastCon 2007 Proceedings , pp.49-53, Richmond, VA, March 2007.

  68. PDF abstract preprint : C. Mack, V. Mogallapu, A. Willis, and T. Weldon, ``Exploiting Typical Clinical Imaging Constraints for 3D Outer Bone Surface Segmentation,'' IEEE SoutheastCon 2007 Proceedings , pp. 519-523, Richmond, VA, March 2007.

  69. PDF preprint : T. P. Weldon, ``Improved Image Segmentation with a Modified Bayesian Classifier,'' 2006 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2006) , pp. II-697-700, Toulouse, FR, May 2006.

  70. PDF preprint : T. P. Weldon, D. T. Lieu, and M. J. Davis, ``Experimental Results at One GHz on Linearizing an NMOS Transistor with a Parallel PMOS Transistor,'' 2005 IEEE Radio Frequency IC Symposium (RFIC 2005) , Long Beach, CA, June 2005.

  71. PDF preprint : T. P. Weldon and K. Miehle, ``Using Amplifiers with Poor Linearity to Linearize Amplifiers with Good Linearity,'' 2003 IEEE MTT-S International Microwave Symposium (IMS 2003) , Philadelphia, PA, vol.3, pp.1741-44, June 2003.

  72. PDF preprint : T. P. Weldon, Yuriy A. Gryazin, and Michael V. Klibanov, ``Novel Inverse Methods in Land Mine Imaging,'' 2001 IEEE Int. Conf. on Acoustics Speech and Signal Processing (ICASSP 2001) , Salt Lake City, UT, 7-11 May, 2001.

  73. Abstract of paper. : Joseph M. Reinhardt, Andrien J. Wang, Thomas P. Weldon, and W. E. Higgins, ``Cue-Based Segmentation of 4D Cardiac Image Sequences,'' Computer Vision and Image Understanding , Vol. 77, No. 2, pp. 251-262 , Feb. 2000.

  74. PDF preprint : Thomas P. Weldon, Yuriy A. Gryazin, and Michael V. Klibanov, ``Comparison of 2D and 1D Approaches to Forward Problem in Mine Detection,'' SPIE Proceedings , Vol. 4038 , pp. 1140-1148 , April 2000.

  75. PDF preprint : T. P. Weldon and W. E. Higgins, ``Designing Multiple Gabor Filters for Multi-Texture Image Segmentation,''
    Optical Engineering , Vol. 38 No. 9 , pp. 1478-1489 , Sept. 1999.

  76. PDF preprint : T. P. Weldon and W. E. Higgins, ``An Algorithm for Designing Multiple Gabor Filters for Segmenting Multi-Textured Images,'' 1998 IEEE Int. Conf. on Image Processing (ICIP98) , Chicago, IL, 4-7 Oct. 1998.

  77. : D. F. Dunn, T. P. Weldon, and W. E. Higgins, ``Extracting Halftones from Printed Documents Using Texture Analysis,'' Optical Engineering , Vol. 36 No. 4, pp. 1044-1052, April 1997.

  78. PDF preprint : T. P. Weldon, W. E. Higgins, and D. F. Dunn, ``Efficient Gabor Filter Design for Texture Segmentation,'' Pattern Recognition , Vol. 29, No. 12, pp. 2005-2015, Dec. 1996.

  79. PDF preprint : T. P. Weldon, W. E. Higgins, and D. F. Dunn, ``Gabor Filter Design for Multiple Texture Segmentation,'' Optical Engineering , Vol. 35 No. 10, pp. 2852-2863, October 1996.

  80. PDF preprint : T. P. Weldon and W. E. Higgins, ``Integrated Approach to Texture Segmentation Using Multiple Gabor Filters,'' 1996 IEEE Int. Conf. on Image Processing (ICIP96) , Lausanne, Switzerland, vol. III, pp. 955-958, 16-19 Sept. 1996.

  81. PDF preprint : D. F. Dunn, T. P. Weldon, and W. E. Higgins, : `` Extracting Halftones from Printed Documents Using Texture Analysis,''
    1996 IEEE Int. Conf. on Image Processing (ICIP96) , Lausanne, Switzerland, vol. II, pp. 225-228, 16-19 Sept. 1996.

  82. PDF preprint : T. P. Weldon and W. E. Higgins, ``Design of Multiple Gabor Filters for Texture Segmentation,'' 1996 IEEE Int. Conf. Acous., Speech, Sig. Proc. (ICASSP96) , Atlanta, GA, vol. IV, pp. 2245-2248, 7 May 1996.

  83. PDF preprint : T. P. Weldon and W. E. Higgins, ``Multiscale Rician Approach to Gabor Filter Design for Texture Segmentation,'' 1994 IEEE Int. Conf. on Image Processing Austin, TX, vol II, pp. 620-624, 13-16 November, 1994.

  84. PDF preprint : T. P. Weldon, W. E. Higgins, and D. F. Dunn, ``Efficient Gabor Filter Design Using Rician Output Statistics,'' 1994 IEEE Int. Symp. Circuits, Systems, London, England, vol. 3, pp. 25-28, 30 May - 2 June, 1994.

  85. T. Weldon, ``An Inductorless Double Scroll Chaotic Circuit,'' American Journal of Physics, October 1990.

Patents

  1. Thomas P. Weldon,  US patent 10,073,812,
    ``Digital discrete-time non-Foster circuits and elements,''
    Sep. 11, 2018, US 10,073,812 patent cover sheet.

  2. Thomas P. Weldon, Ryan S. Adams, Konrad Miehle, US patent 9,715,953,
    ``Wideband Negative-Permittivity Metamaterials and Negative-Permeability Metamaterials Utilizing Non-Foster Elements,''
    Jul. 25, 2017. US 9,715,953 patent cover sheet

  3. D. Binkley, R. Makki, T. Weldon, A. Chehab, US patent 7,710,140,
    ``Methods and apparatus for testing electronic circuits,''
    May 4, 2010. US 7,710,140 patent cover sheet.

  4. D. Binkley, R. Makki, T. Weldon, A. Chehab, US patent 7,148,717,
    ``Methods and apparatus for testing electronic circuits,''
    Dec. 12, 2006, US 7,148,717 patent cover sheet.

  5. T. P. Weldon , US patent 6,943,628,
    `` Methods and apparatus for substantially reducing nonlinear distortion,''
    Sept. 13, 2005, US 6,943,628 patent cover sheet .

  6. T. P. Weldon , US patent 6,906,585,
    ``Method and Apparatus for for cancellation of third order intermodulation distortion and other nonlinearities,''
    June 14, 2005, US 6,906,585 patent cover sheet .

  7. T. P. Weldon , US patent 6,853,247,
    ``Methods and apparatus for using Taylor series expansion concepts to substantially reduce nonlinear distortion,''
    Feb. 8, 2005, US 6,853,247 patent cover sheet .

  8. T. P. Weldon , US patent 6,853,248,
    ``Methods and apparatus for substantially reducing nonlinear distortion using multiple nonlinear devices,''
    Feb. 8, 2005, US 6,853,248 patent cover sheet.

  9. T. P. Weldon , US patent 6,794,938,
    ``Method and Apparatus for for cancellation of third order intermodulation distortion and other nonlinearities,''
    Sept. 21, 2004, US 6,794,938 patent cover sheet.

  10. D. Binkley, R. Makki, T. Weldon, A. Chehab, US patent 6,833,724,
    ``Methods and apparatus for testing electronic circuits,''
    Dec. 21, 2004, US 6,833,724 patent cover sheet.

Refereed Presentations & Abstracts

Other papers


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