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Waleed Khalil

  • Associate Professor, Electrical & Computer Engr.
  • Room #261
    1330 Kinnear Road
    Columbus, OH 43212
  • 614-292-0305

About


Waleed Khalil received his PhD in 2008 from Arizona State University.

Research Interests
Prof. Khalil's current research areas of interest include: RF and mm-wave circuits and systems, sub-THz circuits, front-end actives and passives, high performance clocking circuits, GHz A/D and D/A circuits.

Honors

  • January, 2020

    Best poster award at the 2020 Government Microcircuit Applications & Critical Technology (GOMACTech) Conference.

  • February, 2019

    Analog Devices Outstanding Student Designer Award, 2019.

  • January, 2019

    OSU College of Engineering Lumley Research Award.

  • January, 2018

    SEta Kappa Nu Fred H. Pumphrey's Distinguished Teacher Award in Electrical Engineering.

  • January, 2017

    Best paper award at the 2017 IEEE Compound Semiconductor IC Symposium (CSICS).

  • January, 2017

    Best student paper award at the 2017 IEEE Compound Semiconductor IC Symposium (CSICS).

  • January, 2014

    2nd place best paper competition at 2014 USNC/URSI National Radio Science Conference.

  • January, 2013

    Best paper award at the 2013 IEEE International Symposium on Phased Array Systems and Technology.

  • January, 2013

    Best paper award at the 2013 Wireless Innovation Forum.

  • June, 2011-
    September, 2012

    AFRL Summer Faculty Fellowship.

  • June, 2010-
    September, 2011

    AFRL Summer Faculty Fellowship.

  • May, 2010

    TSMC's Outstanding Circuit Research Award.

  • January, 2010

    Professional Course Instructor.

  • June, 2005

    Intel Achievement Award.

  • January, 1996-
    January, 2004

    Intel Division Recognition Award.

  • January, 1992-
    January, 1993

    University of Minnesota Dean's List.

Books

2011

  • Yoder, Samantha; Ismail, Mohammed; Khalil, Waleed. 2011. "VCO-based quantizers using frequency-to-digital and time-to-digital converters." Springer.

Chapters

2012

  • 2012. "Current and Emerging Trends in the Design of Digital-to-Analog Converters." In Design, Modeling and Testing of Data Converters, edited by P. Carbone, S. Kiaei, T. F. Xu,

2006

  • Khalil, W.; Bakkaloglu, B.. 2006. "Challenges in the design of PLLs in deep-submicron technology."

Journal Articles

2019

  • Fragasse, R.; Tantawy, R.; Dupaix, B.; Dean, T. et al., 2019, "Analysis of SRAM Enhancements Through Sense Amplifier Capacitive Offset Correction and Replica Self-Timing." IEEE Transactions on Circuits and Systems I: Regular Papers 66, no. 6, 2037-2050 - 2037-2050.
  • Tantawy, R.; Patel, V.J.; Smith, D.S.; Rashid, S. et al., 2019, "Wide-Bandwidth, High-Linearity, 2.8-GS/s, 10-bit Accurate Sample and Hold Amplifier in 130-nm SiGe BiCMOS." IEEE Transactions on Circuits and Systems I: Regular Papers 66, no. 5, 1758-1768 - 1758-1768.
  • Fragasse, R.; Tantawy, R.; Dupaix, B.; Dean, T. et al., 2019, "Analysis of SRAM enhancements through sense amplifier capacitive offset correction and replica self-timing." IEEE Transactions on Circuits and Systems I: Regular Papers 66, no. 6, 2037-2050 - 2037-2050.

2018

  • Mathieu, B.L.; McCue, J.J.; Duncan, L.; Dupaix, B. et al., 2018, "A Capacitively Coupled, Pseudo Return-to-Zero Input, Latched-Bias Data Receiver." IEEE Journal of Solid-State Circuits 53, no. 9, 2500-2511 - 2500-2511.

2017

  • McDonnell, S.M.; Patel, V.J.; Duncan, L.; Dupaix, B. et al., 2017, "Compensation and Calibration Techniques for Current-Steering DACs." IEEE Circuits and Systems Magazine 17, no. 2, 4-26 - 4-26.
  • Duncan, L.; Dupaix, B.; McCue, J.J.; Mathieu, B. et al., 2017, "A 10-bit DC-20-GHz Multiple-Return-to-Zero DAC With >48-dB SFDR." IEEE Journal of Solid-State Circuits 52, no. 12, 3262-3275 - 3262-3275.
  • Ouda, M.H.; Khalil, W.; Salama, K.N., 2017, "Self-Biased Differential Rectifier with Enhanced Dynamic Range for Wireless Powering." IEEE Transactions on Circuits and Systems II: Express Briefs 64, no. 5, 515-519 - 515-519.

2016

  • McCue, J.J.; Dupaix, B.; Duncan, L.; Mathieu, B. et al., 2016, "A Time-Interleaved Multimode RF-DAC for Direct Digital-to-RF Synthesis." IEEE Journal of Solid-State Circuits 51, no. 5, 1109-1124 - 1109-1124.
  • Ouda, M.H.; Khalil, W.; Salama, K.N., 2016, "Wide-Range Adaptive RF-to-DC Power Converter for UHF RFIDs." IEEE Microwave and Wireless Components Letters 26, no. 8, 634-636 - 634-636.
  • Elabd, S.; Khalil, W., 2016, "Impact of technology scaling on the tuning range and phase noise of mm-wave CMOS LC-VCOs." Integration, the VLSI Journal 52, 195-207 - 195-207.

2015

  • Alwan, E.A.; Venkatakrishnan, S.B.; Akhiyat, A.A.; Khalil, W. et al., 2015, "Phase Error Evaluation in a Two-Path Receiver Front-End With On-Site Coding." IEEE Access 3, 55-63 - 55-63.
  • Alwan, E.A.; Venkatakrishnan, S.B.; Akhiyat, A.A.; Khalil, W. et al., 2015, "Code Optimization for a Code-Modulated RF Front End." IEEE Access 3, 260-273 - 260-273.

2014

  • Alwan, E.A.; Akhiyat, A.A.; Khalil, W.; Volakis, J.L., 2014, "Analytical and experimental evaluation of a novel wideband digital beamformer with on-site coding." Journal of Electromagnetic Waves and Applications 28, no. 12, 1401-1429 - 1401-1429.
  • Elabd, S.; Balasubramanian, S.; Wu, Q.; Quach, T. et al., 2014, "Analytical and Experimental Study of Wide Tuning Range mm-Wave CMOS LC-VCOs." IEEE Transactions on Circuits and Systems I: Regular Papers 61, no. 5, 1343-1354 - 1343-1354.
  • Alwan, E.A.; Balasubramanian, S.; Atallah, J.G.; LaRue, M. et al., 2014, "Coding-based ultra-wideband digital beamformer with significant hardware reduction." Analog Integrated Circuits and Signal Processing 78, no. 3, 691-703 - 691-703.

2013

  • Balasubramanian, S.; Khalil, W., 2013, "Architectural trends in current-steering digital-to-analog converters." Analog Integrated Circuits and Signal Processing 77, no. 1, 55-67 - 55-67.
  • Wu, Q.; Quach, T.K.; Mattamana, A.; Elabd, S. et al., 2013, "Frequency Tuning Range Extension in LC-VCOs Using Negative-Capacitance Circuits." IEEE Transactions on Circuits and Systems II: Express Briefs 60, no. 4, 182-186 - 182-186.

2012

  • Balasubramanian, S.; Boumaiza, S.; Sarbishaei, H.; Quach, T. et al., 2012, "Ultimate Transmission." IEEE Microwave Magazine 13, no. 1, 64-82 - 64-82.

2011

  • Khalil, W.; Shashidharan, S.; Copani, T.; Chakraborty, S. et al., 2011, "A ${\hbox{700-}}\mu{\hbox {A}}$ 405-MHz All-Digital Fractional-$N$ Frequency-Locked Loop for ISM Band Applications." IEEE Transactions on Microwave Theory and Techniques 59, no. 5, 1319-1326 - 1319-1326.
  • Balasubramanian, S.; Creech, G.; Wilson, J.; Yoder, S.M. et al., 2011, "Systematic Analysis of Interleaved Digital-to-Analog Converters." IEEE Transactions on Circuits and Systems II: Express Briefs 58, no. 12, 882-886 - 882-886.

2010

  • Balasubramanian, S.; Khalil, W., 2010, "Direct digital-to-RF digital-to-analogue converter using image replica and nonlinearity cancelling architecture." Electronics Letters 46, no. 14, 1030-1030 - 1030-1030.
  • Moulder, W.F.; Khalil, W.; Volakis, J.L., 2010, "60-GHz Two-Dimensionally Scanning Array Employing Wideband Planar Switched Beam Network." IEEE Antennas and Wireless Propagation Letters 9, 818-821 - 818-821.
  • Hedayati,Hiva; Khalil,Waleed; Bakkaloglu,Bertan, 2010, "A 1 MHz Bandwidth, 6 GHz 0.18 mu m CMOS Type-I Delta Sigma Fractional-N Synthesizer for WiMAX Applications (vol 44, pg 3244, 2009)." IEEE JOURNAL OF SOLID-STATE CIRCUITS 45, no. 6, 1256-1256 - 1256-1256.

2007

  • Khalil, W.; Bakkaloglu, B.; Kiaei, S., 2007, "A Self-Calibrated On-Chip Phase-Noise Measurement Circuit With $-$75 dBc Single-Tone Sensitivity at 100 kHz Offset." IEEE Journal of Solid-State Circuits 42, no. 12, 2758-2765 - 2758-2765.

2006

  • Hedayati, H.; Bakkaloglu, B.; Khalil, W., 2006, "Closed-Loop Nonlinear Modeling of Wideband$SigmaDelta$Fractional-$N$Frequency Synthesizers." IEEE Transactions on Microwave Theory and Techniques 54, no. 10, 3654-3663 - 3654-3663.

2003

  • Khalil, W.; Tsung-Yuan Chang, ; Xuewen Jiang, ; Naqvi, S.R. et al., 2003, "A highly integrated analog front-end for 3g." IEEE Journal of Solid-State Circuits 38, no. 5, 774-781 - 774-781.

1992

  • Liu, Y.; Khalil, W.; Fischer, P.B.; Chou, S.Y. et al., 1992, "Nanoscale ultrafast metal-semiconductor-metal photodetectors." IEEE Transactions on Electron Devices 39, no. 11, 2674-2675 - 2674-2675.
  • Chou, S.Y.; Liu, Y.; Khalil, W.; Hsiang, T.Y. et al., 1992, "Ultrafast nanoscale metal‐semiconductor‐metal photodetectors on bulk and low‐temperature grown GaAs." Applied Physics Letters 61, no. 7, 819-821 - 819-821.

Unknown

  • Rahman, M.T.; Rahman, M.S.; Wang, H.; Tajik, S. et al., "Defense-in-Depth: A Recipe for Logic Locking to Prevail."

Presentations

  • "Workshop: Volumetric Switched Beam Array for 60 GHz Wireless Systems." 2010, Presented at IEEE MTT International Microwave Symposium (IMS),
  • "Ultra Wideband Direct Digital-to-RF D/A Architecture and Circuits." 2010, Presented at IEEE Dallas Circuits and Systems (DCAS),
  • "Short Course: Characterization and Measurement of Phase Noise and Jitter." 2010, Presented at ElectroScience Lab Consortium for EM and RF (CERF),
  • "Short Course: Millimeter Wave Circuits: Embracing The Next Wave of Wireless Communication." 2010, Presented at Radio and Mixed Signal Integrated Systems (RAMSIS) 6th Summer School,
  • "Short Course: Characterization and Measurement of Phase Noise and Jitter." 2011, Presented at ElectroScience Lab Consortium for EM and RF (CERF),
  • "Invited Talk: VCO Design Challenges And Solutions For Mm-Wave Applications." 2019, Presented at IEEE Circuits and Systems Society (CASS) Santa Clara Valley Section, Santa Clara, California,,
  • "Invited Talk: Process Specific Functions for Assurance of Analog-Mixed-Signal Integrated Circuits." 2018, Presented at IEEE International Test Conference (ITC),
  • "Short Course: Fundamentals of Radio Systems." 2018, Presented at Harris Corporation Invited Course,
  • "Short Course: The Radio Modem: RF Transceiver From Antenna to Bits and Back." 2020, Presented at Besser Associates Short Course,
  • "Short Course: Fundamentals of RF Radio Systems." 2019, Presented at Lockheed Martin Invited Course,
  • "Short Course: Analysis and Design of High Performance PLLs and Frequency Synthesizers." 2019, Presented at Lockheed Martin Invited Course,
  • "Short Course: The Radio Modem: RF Transceiver From Antenna to Bits and Back." 2018, Presented at Besser Associates Short Course,
  • "Short Course: Characterization and Measurement of Phase Noise and Jitter." 2018, Presented at Besser Associates Short Course,
  • "Short Course: Introduction to Si RF & Mixed Signal IC Design." 2017, Presented at IEEE Compound Semiconductor IC Symposium (CSICS),
  • "Short Course: The Radio Modem: RF Transceiver From Antenna to Bits and Back." 2017, Presented at Besser Associates Short Course,
  • "Short Course: Analysis and Design of mm-Wave VCOs in CMOS and Bipolar Technologies." 2017, Presented at ElectroScience Lab Consortium on Electromagnetics and Radio Frequencies (CERF),
  • "Short Course: Wideband PLLs and Digital Frequency Synthesis: Challenges and Solutions." 2016, Presented at ElectroScience Lab Consortium on Electromagnetics and Radio Frequencies (CERF),
  • "Short Course: Wideband PLLs and Frac-N Synthesizers for SDRs; Challenges and Solutions." 2015, Presented at ElectroScience Lab Consortium on Electromagnetics and Radio Frequencies (CERF),
  • "Short Course: RFIC Architectures and Design for Radar and Communication Systems." 2014, Presented at ElectroScience Lab Consortium on Electromagnetics and Radio Frequencies (CERF),
  • "Short Course: High Performance Digital to Analog Converters: Challenges and Solutions." 2017, Presented at ElectroScience Lab Consortium on Electromagnetics and Radio Frequencies (CERF),
  • "Workshop Invited Speaker: The Insider Guide to Designing mm-Wave Silicon VCOs." 2017, Presented at IEEE RFIC Symposium,
  • "Short Course: Characterization and Measurement of Phase Noise and Jitter." 2017, Presented at Besser Associates Short Course,
  • "Short Course: The Radio Modem: RF Transceiver From Antenna to Bits and Back." 2016, Presented at Besser Associates Short Course,
  • "Short Course: Introduction to Si RFIC Design." 2016, Presented at IEEE Compound Semiconductor IC Symposium (CSICS),
  • "Short Course: Characterization and Measurement of Phase Noise and Jitter." 2016, Presented at Besser Associates Short Course,
  • "Short Course: Introduction to Si RFIC Design." 2015, Presented at IEEE Compound Semiconductor IC Symposium (CSICS),
  • "Short Course: The Radio Modem: RF Transceiver From Antenna to Bits and Back." 2015, Presented at Besser Associates Short Course,
  • "Short Course: Wideband PLLs and Frac-N Synthesizers for SDRs: Challenges and Solutions." 2015, Presented at Air Force Research Lab Invited Course,
  • "Short Course: Wireless Design: An End to End Systems' Perspective." 2015, Presented at Vigilant Global Invited Course,
  • "Short Course: Characterization and Measurement of Phase Noise and Jitter." 2015, Presented at Besser Associates Short Course,
  • "Short Course: Characterization and Measurement of Phase Noise and Jitter." 2014, Presented at Besser Associates Short Course,
  • "Workshop Invited Speaker: To HBT or Not HBT? Why CMOS Cannot Do it Alone!!." 2014, Presented at DARPA MTO Workshop,
  • "Short Course: Introduction to Si RFIC Design." 2014, Presented at IEEE Compound Semiconductor IC Symposium (CSICS),
  • "Short Course: RF Wireless System Design Fundamentals." 2014, Presented at Ericsson Invited Short Course,
  • "Invited Talk: Challenges and Roadmap to Ultra Wideband and Low Phase Noise mm-wave VCOs." 2014, Presented at CMOS Emerging Technologies Research,
  • "Invited Talk: Towards the Design of Robust Wide Tuning Range & Low Phase Noise mm-Wave VCOs: Challenges, Solutions and Recent Advances." 2014, Presented at University of Pierre and Marie Curie, Paris, France,
  • "Invited Talk: Towards the Design of Robust Wide Tuning Range and Low Phase Noise mm-Wave VCOs." 2014, Presented at University of Southern California, Los Angeles, CA,
  • "Invited Talk: Towards Ultra Wide Tuning Range and Low Phase Noise mm-Wave VCOs: A Negative Capacitance and BiCMOS Perspective." 2013, Presented at IEEE MTT Local Chapter, Washington DC,
  • "Plenary Talk: Toward Millimeter-Wave DACs: Challenges and Opportunities." 2012, Presented at IEEE Compound Semiconductor IC Symposium (CSICS),
  • "Invited Talk: Towards mm-Wave Design in Nanometer CMOS: Challenges and Solutions." 2012, Presented at University of Calgary, Calgary, Canada,
  • "Invited Talk: Negative Capacitance Circuits and Their Applications to ESD and Parasitic Capacitance Cancellation in High Speed IO Cells." 2010, Presented at Intel Research Labs, Hillsboro, Oregon,
  • "Short Course: Recent Advances in The Design of Wideband PLLs." 2009, Presented at Swedish Royal Inst. Of Technology (KTH) RAMSIS Summer School, Cairo, Egypt,
  • "Invited Talk: An On-Chip Phase Noise Analyzer." 2009, Presented at IBM Research Center, Yorktown Heights, New York,
  • "Short Course:Wideband Frequency Synthesizers." 2008, Presented at Swedish Royal Inst. Of Technology (KTH) RAMSIS Summer School, Stockholm, Sweden,
  • "Workshop Invited Speaker: Accurate Tuning and Calibration of Fractional-N Frequency Synthesizers." 2008, Presented at IEEE RFIC Symposium,
  • "Short Course: Frequency Synthesis for Wireless Systems." 2007, Presented at Swedish Royal Inst. Of Technology (KTH) RAMSIS Summer School, Gammarth, Tunisia,
  • "Tutorial Invited Speaker: RFIC Circuit and System Design." 2007, Presented at IEEE RFIC Symposium,
  • "Short Course: RF CMOS Design Solutions for 4G Wireless." 2006, Presented at Swedish Royal Inst. Of Technology (KTH) RAMSIS Summer School, Malaga, Spain,
  • "Invited Talk: Analysis of Phase Noise and Its Impact on RF Systems." 2005, Presented at IEEE International Conference on Electronics Circuits ad Systems, ICECS,
  • "Short Course: Introduction to Wireless Radio Communications." 2004, Presented at Swedish Royal Inst. Of Technology (KTH) RAMSIS Summer School, Beirut, Lebanon,

Papers in Proceedings

2019

  • Dean, T.; Quach, T.; Rashid, S.; James, T. et al. "Wideband High-Efficiency Reconfigurable Digital Power Amplifier in GaN." in Government Microcircuit Applications Conference (GOMAC). (3 2019).
  • Tantawy, R.; Patel, V.J.; Smith, D.S.; Rashid, S.M.S. et al. "Wide-Bandwidth, High-Linearity, 2.8-GS/s, 10-bit Accurate Sample and Hold Amplifier in 130-nm SiGe BiCMOS." (5 2019).
  • Belz, M.; Kines, M.; Rashid, S.; Smith, D. et al. "Optimal Component Selection for mm-Wave VCOs using Evolutionary Algorithms." in Government Microcircuit Applications Conference (GOMAC). (3 2019).
  • Specht, T.; Taghipour, Z.; Ronningen, T.J.; Fragasse, R. et al. "Photodetector architecture for open circuit voltage operation of MWIR InAsSb detectors." (8 2019).
  • Casto, M.; Dupaix, B.; Orlando, P.L.; Khalil, W. "Process Specific Functions for Assurance of Analog/Mixed-Signal Integrated Circuits." (8 2019).
  • Specht, T.; Taghipour, Z.; Ronningen, T.J.; Fragasse, R. et al. "Novel photodetector design using open circuit voltage for mid-wave infrared imagers." (1 2019).

2018

  • Abdelfattah, M.; Swilam, M.; Dupaix, B.; Smith, S. et al. "An on-chip resonant-gate-drive switched-capacitor converter for near-threshold computing achieving 70.2% efficiency at 0.92A/mm2current density and 0.4V output." (3 2018).
  • Fragasse, R.; Dupaix, B.; Tantawy, R.; James, T. et al. "Sense Amplifier Offset Cancellation and Replica Timing Calibration for High-Speed SRAMs." in 9th IEEE Latin American Symposium on Circuits and Systems (LASCAS). (1 2018).
  • Tantawy, R.; Patel, V.J.; Smith, D.S.; Casto, M. et al. "A High Linearity, 2.8 GS/s, 10-bit Accurate, Sample and Hold Amplifier in 130 nm SiGe BiCMOS." (4 2018).
  • Alzahrani, S.; Elabd, S.; Khalil, W. "A Wide Tuning Range Millimeter Wave CMOS LCVCO with Linearized Coarse Tuning Characteristics." (12 2018).
  • Larue, M.; Barton, T.; Belz, M.; Rashid, S. et al. "Multifunction Transmitter based on a Fully-Digital CMOS/GaN Architecture in DAHI Technology." in Government Microcircuit Applications Conference (GOMAC). (3 2018).
  • Naguib, A.; Tawfik, E.; Smith, D.; Dupaix, B. et al. "High Resolution Wide Bandwidth Integrated Arbitrary Amplitude and Phase Waveform Generator." in Government Microcircuit Applications Conference (GOMAC). (3 2018).

2017

  • Quach, T.; Watson, P.; Dupaix, B.; Barton, T. et al. "Wideband high-efficiency digital power amplifier in GaN." (12 2017).
  • Mathieu, B.; McCue, J.J.; Dupaix, B.; Patel, V.J. et al. "An AC coupled 10 Gb/s LVDS-compatible receiver with latched data biasing in 130 nm SiGe BiCMOS." (12 2017).
  • Larue, M.; Dupaix, B.; Rashid, S.; Barton, T. et al. "A fully-integrated S/C band transmitter in 45nm CMOS/0.2gm GaN heterogeneous technology." (12 2017).
  • Swilam, M.; Naguib, A.; Dupaix, B.; Khalil, W. et al. "A calibration-free low-power supply-pushing reduction circuit (SPRC) for LC VCOs." (9 2017).
  • Duncan, L.; Dupaix, B.; McCue, J.; Mathieu, B. et al. "A 10b DC-to-20GHz multiple-return-to-zero DAC with >48dB SFDR." (3 2017).

2016

  • Rashid, S.; Dupaix, B.; Watson, P.; Gaber, W. et al. "A Wide-Band Complementary Digital Driver for Pulse Modulated Single-Ended and Differential S/C Bands Class-E PAs in 130 nm GaAs Technology." (11 2016).
  • Mattamana, A.; Gouty, W.; Khalil, W.; Watson, P. et al. "Multi-Octave and Frequency-Agile LNAs Covering S-C Band Using 0.25 μm GaN Technology." (11 2016).
  • Alwan, E.A.; Papantonis, D.; Novak, M.; Akhiyat, A.A. et al. "Reduced-power millimeter-wave reconfigurable systems." (5 2016).

2015

  • Venkatakrishnan, S.B.; Akhiyat, A.A.; Alwan, E.A.; Khalil, W. et al. "Phase characterization of an 8-channel on-site coding receiver for digital beamforming." (10 2015).
  • McCue, J.J.; Dupaix, B.; Duncan, L.; Patel, V.J. et al. "A time-interleaved multi-mode ΔΣ RF-DAC for direct digital-to-RF synthesis." (11 2015).
  • Watt, S.J.; Alwan, E.A.; Khalil, W.; Volakis, J.L. "Wideband self-interference cancellation filter for Simultaneous Transmit and Receive systems." (10 2015).
  • Scherer, K.L.; Watt, S.J.; Alwan, E.A.; Akhiyat, A.A. et al. "Simultaneous transmit and receive system architecture with four stages of cancellation." (10 2015).
  • Venkatakrishnan, S.B.; Akhiyat, A.A.; Alwan, E.A.; Khalil, W. et al. "Angle of arrival estimation across a 10:1 bandwidth architecture using on-site coding receiver." (10 2015).
  • Abdelfattah, M.; Dupaix, B.; Naqvi, S.; Khalil, W. "A fully-integrated switched capacitor voltage regulator for near-threshold applications." (1 2015).

2014

  • Alwan, E.A.; Khalil, W.; Volakis, J.L. "Analytical and experimental evaluation of a novel wideband transceiver with on-site coding." (1 2014).
  • McCue, J.J.; Casto, M.; Li, J.C.; Watson, P. et al. "An active double-balanced down-conversion mixer in InP/Si BICMOS operating from 70-110 GHz." (1 2014).
  • Venkatakrishnan, S.B.; Akhiyat, A.; Alwan, E.A.; Khalil, W. et al. "Realization of a novel on-site coding digital beamformer using FPGAs." (1 2014).
  • Abdelfattah, M.; Naqvi, S.; Dupaix, B.; Khalil, W. "Tracking energy efficiency of near-threshold design using process variation control techniques." (1 2014).
  • Volakis, J.L.; Alwan, E.A.; Papantonis, D.; Khalil, W. "Ultra-wideband conformal apertures with digital beamforming for UHF to millimeter-wave applications." (1 2014).
  • Liang, Y.; Eliezer, O.; Islam, Z.; Rajan, D. et al. "Interference-robustness improvement in BPSK receivers for the enhanced WWVB broadcast." (1 2014).
  • Alwan, E.A.; Akhiyat, A.; Khalil, W.; Volakis, J.L. "Phase characterization of a 2-path on-site coding digital beamformer." (1 2014).
  • Khalil, W.; McCue, J.; Dupaix, B.; Gaber, W. et al. "On the design of RF-DACs for random acquisition based reconfigurable receivers." (1 2014).

2013

  • Alwan, E.A.; Larue, M.; Khalil, W.; Volakis, J.L. "Experimental validation of a coding-based digital beamformer." (12 2013).
  • Yoder, S.M.; Balasubramanian, S.; Khalil, W.; Patel, V.J. "Accuracy and speed limitations in DACs across CMOS process technologies." (12 2013).
  • Liang, Y.; Rajan, D.; Eliezer, O.; Balasubramanian, S. et al. "A new broadcast format and receiver architecture for radio controlled clocks." (12 2013).
  • Wu, Q.; Elabd, S.; McCue, J.J.; Khalil, W. "Analytical and experimental study of tuning range limitation in mm-wave CMOS LC-VCOs." (9 2013).
  • Alwan, E.A.; Khalil, W.; Volakis, J.L. "Ultra-wideband on-site coding receiver (OSCR) for digital beamforming applications." (12 2013).
  • Alwan, E.A.; Akhiyat, A.; Larue, M.; Khalil, W. et al. "Low cost, power efficient, on-site coding receiver (OSCR) for ultra-wideband digital beamforming." (12 2013).
  • Q. Wu, T. Quach, A. Mattamana, S. Elabd, S. R. Dooley, J. J. McCue, P. L. Orlando, G. Creech, W. Khalil "A 10mW 37.8GHz Current Redistribution BiCMOS VCO with an Average FOMT of -193.5dBc/Hz." in IEEE International Solid-State Circuits Conference (ISSCC). (2 2013).
  • Wu, Q.; Elabd, S.; Quach, T.K.; Mattamana, A. et al. "A -189 dBc/Hz FOMT wide tuning range Ka-band VCO using tunable negative capacitance and inductance redistribution." (9 2013).
  • E.A. Alwan, S. Balasubramanian,J. G. Atallah,M. Larue, W. Khalil, K. Sertel, J.L. Volakis "Ultra-wideband Digital Beamformer with Significant SWAP-C Reduction." in Wireless Innovation Forum (SDR 2013). (1 2013).

2012

  • Wu, Q.; Quach, T.; Mattamana, A.; Elabd, S. et al. "Design of wide tuning-range mm-wave VCOs using negative capacitance." (12 2012).
  • Q. Wu, T. Quach, A. Mattamana, S. Soliman, S. Dooley, J. McCue, P. L. Orlando, G. Creech, W. Khalil "Negative Capacitance Circuits Design Considerations for Wide Tuning Range mm-Wave VCOs." in IEEE Compound Semiconductor IC Symposium (CSICS 2012). (10 2012).
  • Alwan, E.A.; Balasubramanian, S.; Atallah, J.G.; Larue, M.R. et al. "Coding-based transceiver for phased array with significant hardware reduction." (12 2012).
  • W. Khalil, J. Wilson, B. Dupaix, S. Balasubramanian, G. Creech "(invited) Toward Millimeter-Wave DACs: Challenges and Opportunities." in Compound Semiconductor IC Symposium (CSICS 2012). (10 2012).
  • Balasubramanian, S.; Khalil, W. "Architectural trends in GHz speed DACs." (12 2012).

2011

  • S. Yoder, W. Khalil, M. Ismail and G. Creech "Analysis and Modeling of Non-Idealities in VCO-Based Quantizers using Frequency-to-Digital and Time-to-Digital Converters." in Government Microcircuit Applications Conference (GOMAC). (3 2011).
  • J. McCue, S. Bou-Sleiman, L. Orlando, A. Mattamana, T. Quach, G. Creech, W. Khalil "Physical Modeling of a Parasitic Net Area Check (NAC) Tie-Down Diode for De-embedding." in 8th International Applied Computational Electromagnetics Society (ACES) Conference. (12 2011).
  • J. McCue, W. Khalil, L. Orlando, K. Groves, A. Mattamana, T. Quach and G. Creech "LNA Linearization at the Ka Band Using a .13µm SiGe Technology." in Government Microcircuit Applications Conference (GOMAC). (3 2011).
  • J. Lowe, M. Deutch, G. Nelson, D. Sutton, W. Yates, P. Hansen, O. Eliezer, T. Jung, S. Morrison, Y. Liang, D. Rajan, S. Balasubramanian, A. Ramasami, W. Khalil "New Improved System for WWVB Broadcast." in 43rd Annual Precise Time and Time Interval (PTTI) Meeting. (11 2011).

2010

  • Shashidharan, S.; Khalil, W.; Chakraborty, S.; Kiaei, S. et al. "A 700uA, 405MHz fractional-N all digital frequency-locked loop for MICS band applications." (7 2010).
  • Hu, J.; Liu, W.; Khalil, W.; Ismail, M. "Increasing sleep-mode efficiency by reducing battery current using a DC-DC converter." (9 2010).
  • Sleiman, S.B.; Akour, A.; Khalil, W.; Ismail, M. "Millimeter-wave BiST and BiSC using a high-definition sub-ranged detector in 90nm CMOS." (9 2010).
  • Liu, W.; Khalil, W.; Ismail, M.; Kussener, E. "A resistor-free temperature-compensated CMOS current reference." (8 2010).
  • Akour, A.; Khalil, W.; Ismail, M. "Sub-THz high gain wide-band low noise amplifiers in 90nm RF CMOS technology." (12 2010).
  • Moulder, W.F.; Khalil, W.; Volakis, J.L. "60 GHz volumetric switched beam array." (6 2010).
  • A. Akour, W. Khalil, J. Volakis, M. Ismail "A Compact Model for mm-Wave Tramission Lines and Interconnects on Lossy CMOS Substrates." in IEEE International Electronics, Circuits and Systems Conference (ICECS). (12 2010).

2009

  • Abdelmoneum, M.; Browning, D.; Arabi, T.; Khalil, W. "Micro and Nano Electro Mechanical Systems (MEMS/NEMS) for mobile computing systems." (12 2009).
  • H. Hedayati, W. Khalil, B. Bakkaloglu "A 1MHz-Bandwidth Type-I ΔΣ Fractional-N Synthesizer for WiMAX Applications." in IEEE International Solid-State Circuits Conference (ISSCC). (2 2009).

2008

  • W. Khalil, H. Hedayati, B. Bakkaloglu, S. Kiaei "(Invited) Analysis and Modeling of Noise Folding and Spurious Emission in Wideband ΣΔ Fractional-N Synthesizers." in IEEE Radio Frequency Integrated Circuits Symposium (RFIC). (6 2008).

2007

  • Valdes-Garcia, A.; Khalil, W.; Bakkaloglu, B.; Silva-Martinez, J. et al. "Built-in self test of RF transceiver SoCs: From signal chain to RF synthesizers (invited)." (10 2007).
  • W. Khalil, B. Bakkaloglu, S. Kiaei "A Self-Calibrated, On-chip Phase Noise Measurement Circuit with -75dBc Single Tone Sensitivity at 100kHz Offset." in IEEE International Solid-State Circuits Conference (ISSCC). (2 2007).

2003

  • Khalil, W.; Chang, T.Y.; Jiang, X.; Naqvi, S.R. et al. "Fully integrated AFE for WCDMA." (12 2003).

2002

  • Liu, Y.; Khalil, W.; Fischer, P.B.; Chou, S.Y. et al. "Nanoscale Ultrafast Metal-Semiconductor-Metal Photodetectors." in IEEE Device Research Conference. (8 2002).
  • T. Chang, X. Jiang, W. Khalil, S. Naqvi, B. Nikjou, J. Tseng "Analog front end IC for 3G WCDMA." in IEEE Symposium on VLSI Circuits. (6 2002).

Patents

  • K. Glass, W. Khalil, B. McDaniel. "High speed, low power, current mode comparator." Patent number: 6008673
  • K. Glass, W. Khalil, B. McDaniel. "Ultra high speed, low power, flash A/D converter utilizing a current mode regenerative comparator." Patent number: 6037890
  • K. Glass, W. Khalil, B. McDaniel. "Electronic system with high speed, low power, A/D converter." Patent number: 6121913
  • W. Khalil, C. Shi, J. Wilson. "Multiplexed digital-to-analog converters used in communication devices." Patent number: 6621437
  • Afghahi,Morteza; Waleed,Khalil; Sami,Issa. "Amplifier assisted active pixel read out structure." Patent number: 6717616
  • Jiang,Xuewen; Nikjou,Bobby,B; Khalil,Waleed; Naqvi,Syed,R. "Differential digital-to-analog converter." Patent number: 6924761
  • T. Chang, W. Khalil, B. Nikjou. "Method and circuit to reduce intermodulation distortion." Patent number: 6975846
  • W. Khalil. "Voltage controlled oscillator apparatus, method, and system." Patent number: 7034623
  • W. Khalil, T. Chang, B. Nikjou. "Self-calibrating tunable filter." Patent number: 7050781
  • X. Jiang, B. Nikjou, W. Khalil, S. Naqvi. "Differential digital-to-analog converter." Patent number: 7242338
  • J. Tseng, W. Khalil, B. Nikjou, L. Johnson. "Programmable gain amplifier with self-adjusting offset correction." Patent number: 7302246
  • "Low Voltage Differential Signal Receiver with Fully Integrated AC Coupling and Bias Latching." Patent number: 9698735
  • "Wide-band Digital Buffer Driver." Patent number: 10411706
  • "Multi-function reconfigurable delta sigma DAC." Patent number: US9065472B1
  • "High-speed low-latency current-steering DAC." Patent number: US9184764B1