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Waleed Khalil

  • Associate Professor, Electrical & Computer Engr.
  • 205 Dreese Laboratories
    2015 Neil Ave
    Columbus, OH 43210
  • 614-292-0305

About

Education

Ph.D. 2008, Arizona State University

Areas of interest

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.

Office

251 ElectroScience Laboratory; 1320 Kinnear Road, Columbus, OH 43212 or 468 Dreese Laboratories

Books

2011

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

Chapters

2012

  • Sidharth Balasubramanian, Vipul Patel, Waleed Khalil. 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

  • W. Khalil, B. Bakkaloglu. 2006. "Challenges in the Design of PLLs in Deep-Submicron Processes." In Radio design in nanometer technologies,

Journal Articles

2013

  • 2013, "Frequency Tuning Range Extension in LC-VCOs Using Negative-Capacitance Circuits." IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS 60, no. 4,

2012

  • S. Balasubramanian, S. Boumaiza, H. Sarbishaei, T. Quach, P. Orlando, J. Volakis, G. Creech, J. Wilson, W. Khalil, 2012, "The Quest for a Fully Digital Transmitter: Ultimate Transmission." IEEE Microwave Magazine 13, 64-82 - 64-82.

2011

  • 2011, "Systematic Analysis of Interleaved Digital-to-Analog Converters." IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS 58, no. 12,
  • W. Khalil, S. Shashidharan, T. Copani, S. Chakraborty, S. Kiaei, and B. Bakkaloglu, 2011, "A 700-uA 405-MHz All-Digital Fractional-N Frequency-Locked Loop for ISM Band Applications." IEEE Trans. Microwave Theory and Techniques 59, no. 5, 1319-1326 - 1319-1326.

2010

  • 2010, "Direct digital-to-RF digital-to-analogue converter using image replica and nonlinearity cancelling architecture." ELECTRONICS LETTERS 46, no. 14,
  • 2010, "60-GHz Two-Dimensionally Scanning Array Employing Wideband Planar Switched Beam Network." IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS 9,
  • 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,

2009

  • 2009, "A 1MHz-bandwidth type-I Δ∑fractional-N synthesizer for WiMAX applications." Digest of Technical Papers - IEEE International Solid-State Circuits Conference

2007

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

2006

  • 2006, "Closed-loop nonlinear modeling of wideband Sigma Delta fractional-N frequency synthesizers." IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES 54, no. 10,

2003

  • W. Khalil, T. Chang, X. Jiang, S. Naqvi, B. Nikjou, J. Tseng, 2003, "A Highly Integrated Analog Front-end for 3G." IEEE Journal of Solid State Circuits 38, no. 5, 774-781 - 774-781.
  • 2003, "A highly integrated analog front-end for 3G." IEEE JOURNAL OF SOLID-STATE CIRCUITS 38, no. 5,

1992

  • Y. Liu, W. Khalil, P. Fischer, S. Chou, T.Y. Hsiang, S. Alexandrou, R. Sobolewski, 1992, "Nanoscale Ultrafast Metal-Semiconductor-Metal Photodetectors." IEEE Trans. Electron Devices 39, no. 11, 2674-2675 - 2674-2675.
  • 1992, "NANOSCALE ULTRAFAST METAL-SEMICONDUCTOR METAL PHOTODETECTORS." IEEE TRANSACTIONS ON ELECTRON DEVICES 39, no. 11,
  • 1992, "ULTRAFAST NANOSCALE METAL-SEMICONDUCTOR-METAL PHOTODETECTORS ON BULK AND LOW-TEMPERATURE GROWN GAAS." APPLIED PHYSICS LETTERS 61, no. 7,

Presentations

  • "Introduction to Phase Noise." 2011,
  • "Towards mm-Wave Design in Nanometer CMOS: Challenges and Solutions." 2012,
  • "Short Course: Introduction to Wireless Radio Communications." 2004,
  • "Short Course:Wideband Frequency Synthesizers." 2008,
  • "Short Course: Frequency Synthesis for Wireless Systems." 2007,
  • "Workshop: Accurate Tuning and Calibration of Fractional-N Frequency Synthesizers." 2008,
  • "Short Course: Recent Advances in The Design of Wideband PLLs." 2009,
  • "Introduction to Phase Noise." 2010,
  • "Workshop: Volumetric Switched Beam Array for 60 GHz Wireless Systems." 2010,
  • "Ultra Wideband Direct Digital-to-RF D/A Architecture and Circuits." 2010,
  • "RF CMOS Design." 2012,
  • "Negative Capacitance Circuits and Their Applications to ESD and Parasitic Capacitance Cancellation in High Speed IO Cells." 2010,
  • "Short Course: Characterization and Measurement of Phase Noise and Jitter." 2010,
  • "Short Course: Millimeter Wave Circuits: Embracing The Next Wave of Wireless Communication." 2010,
  • "Short Course: Characterization and Measurement of Phase Noise and Jitter." 2011,
  • "Analysis of Phase Noise and Its Impact on RF Systems." 2005,
  • "Short Course: RF CMOS Design Solutions for 4G Wireless." 2006,
  • "Tutorial: RFIC Circuit and System Design." 2007,
  • "An On-Chip Phase Noise Analyzer." 2009,

Papers in Proceedings

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." JOURNAL: "Proceeding: Wireless Innovation Forum (SDR 2013)." in Wireless Innovation Forum (SDR 2013). (1 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." JOURNAL: "IEEE International Solid-State Circuits Conference (ISSCC)." in IEEE International Solid-State Circuits Conference (ISSCC). (2 2013). . - ..

2012

  • S. Balasubramanian, W. Khalil "Architectural Trends in GHz Speed DACs." JOURNAL: "Proceedings: IEEE NORCHIP Conference." in IEEE NORCHIPConference. (11 2012).
  • S. Balasubramanian, W. Khalil "Architectural Trends in GHz Speed DACs." JOURNAL: "PROCEEDINGS OF THE 2012 IEEE Norchip Conference (Norchip 2012)." in IEEE Norchip Conference (Norchip 2012). (11 2012). . - ..
  • "Toward Millimeter-Wave DACs: Challenges and Opportunities." in IEEE Compound Semiconductor Integrated Circuit Symposium (CSICS). (1 2012).
  • E.A. Alwan, S. Balasubramanian,J. G. Atallah,M. Larue, W. Khalil, K. Sertel, J.L. Volakis "Invited: Coding-Based Transceiver for Phased Array with Significant Hardware Reduction." JOURNAL: "Proceedings: IEEE International Conference on Wireless Information Technology and Systems (ICWITS 2012)." in IEEE International Conference on Wireless Information Technology and Systems (ICWITS 2012). (11 2012).
  • E. A. Alwan, K. Sertel, W. Khalil, J. L. Volakis "Cost and Power Efficient Ultra-Wideband Digital Beamforming for Cognitive Sensing." JOURNAL: "EEE Antennas and Propagation Society International Symposium (APS)." in IEEE Antennas and Propagation Society International Symposium (APS 2012). (7 2012).
  • W. Khalil, J. Wilson, B. Dupaix, S. Balasubramanian, G. Creech "(invited) Toward Millimeter-Wave DACs: Challenges and Opportunities." JOURNAL: "ROCEEDINGS OF THE 2012 IEEE Compound Semiconductor IC Symposium (CSICS 2012).." in Compound Semiconductor IC Symposium (CSICS 2012). (10 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." JOURNAL: "PROCEEDINGS OF THE 2012 IEEE Compound Semiconductor IC Symposium (CSICS 2012)." in IEEE Compound Semiconductor IC Symposium (CSICS 2012). (10 2012).

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." JOURNAL: "Government Microcircuit Applications Conference (GOMAC)." in Government Microcircuit Applications Conference (GOMAC). (3 2011). 31.14 - 31.14.
  • 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." JOURNAL: "8th International Applied Computational Electromagnetics Society (ACES) Conference." in 8th International Applied Computational Electromagnetics Society (ACES) Conference. (12 2011). 9-11 - 9-11.
  • 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." JOURNAL: "43rd Annual Precise Time and Time Interval (PTTI) Meeting." in 43rd Annual Precise Time and Time Interval (PTTI) Meeting. (11 2011). 1-21 - 1-21.
  • 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." JOURNAL: "Government Microcircuit Applications Conference (GOMAC)." in Government Microcircuit Applications Conference (GOMAC). (3 2011). 8.2 - 8.2.

2010

  • "A compact model for mm-wave transmission lines and interconnects on lossy CMOS substrates." (12 2010).
  • J. Hu ; W. Liu, W. Khalil, M. Ismail "Increasing sleep-mode efficiency by reducing battery current using a DC-DC converter." JOURNAL: "53RD IEEE INTERNATIONAL MIDWEST SYMPOSIUM ON CIRCUITS AND SYSTEMS." in IEEE International Midwest Symposium on Circuits and Systems (MWSCAS). (8 2010). 53-56 - 53-56.
  • W. Moulder, W. Khalil J. Volakis "60 GHz Volumetric Switched Beam Array." JOURNAL: "Antenna Technology (iWAT), 2010 International Workshop on." in Antenna Technology (iWAT), 2010 International Workshop on. (3 2010). 1-4 - 1-4.
  • S.B. Sleiman, A. Akour, W. Khalil, M. Ismail "(Invited) Millimeter-wave BiST and BiSC using a high-definition sub-ranged detector in 90nm CMOS." JOURNAL: "53RD IEEE INTERNATIONAL MIDWEST SYMPOSIUM ON CIRCUITS AND SYSTEMS." in IEEE International Midwest Symposium on Circuits and Systems (MWSCAS). (8 2010). 477-480 - 477-480.
  • W. Liu, W. Khalil, M. Ismail E. Kussener "A Resistor-Free Temperature-Compensated CMOS Current Reference." JOURNAL: "2010 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS." in IEEE International Symposium on Circuits and Systems (ISCAS). (6 2010). 845-848 - 845-848.
  • W. Moulder, W. Khalil J. Volakis "60 GHz Volumetric Switched Beam Array." JOURNAL: "IEEE Antennas and Propagation Society International Symposium and URSI Radio Science Meeting (APS/URSI 2010)." in IEEE Antennas and Propagation Society International Symposium and URSI Radio Science Meeting (APS/URSI 2010). (7 2010). 507.5 - 507.5.
  • S. Shashidharan, W. Khalil, S. Chakraborty, S. Kiaei, T. Copani, B. Bakkaloglu "A 700uA, 405MHz Fractional-N All Digital Frequency-Locked Loop for MICS Band Applications." JOURNAL: "2010 IEEE RADIO FREQUENCY INTEGRATED CIRCUITS RFIC SYMPOSIUM." in IEEE Radio Frequency Integrated Circuits Symposium (RFIC). (5 2010). 409-412 - 409-412.

2009

  • "A 1 MHz Bandwidth, 6 GHz 0.18 mu m CMOS Type-I Delta Sigma Fractional-N Synthesizer for WiMAX Applications." in IEEE International Solid-State Circuits Conference (ISSCC). (12 2009).
  • M. Abdelmoneum, D. Browning, T. Arabi W. Khalil "Micro and Nano Electro Mechanical Systems (MEMS/NEMS) for Mobile Computing Systems." JOURNAL: "2009 IEEE 70TH VEHICULAR TECHNOLOGY CONFERENCE FALL, VOLS 1-4." in IEEE Vehicular Technology Conference. (9 2009). 1-4 - 1-4.

2008

  • "(INVITED) analysis and modeling of noise folding and spurious emission in wideband fractional-N synthesizers." (9 2008).

2007

  • A. Garcia, W. Khalil, B. Bakkaloglu, J. Martinez, E. Sanchez "(Invited) Built-in Self Test of RF Transceiver SoCs: from Signal Chain to RF Synthesizers." JOURNAL: "2007 IEEE RADIO FREQUENCY INTEGRATED CIRCUITS (RFIC) SYMPOSIUM, DIGEST OF PAPERS." in IEEE Radio Frequency Integrated Circuits Symposium (RFIC). (6 2007). 335-338 - 335-338.
  • "A self-calibrated on-chip phase-noise-measurement circuit with -75dBc single-tone sensitivity at 100kHz offset." (9 2007).

2003

  • W. Khalil, T. Chang, X. Jiang, S. Naqvi, B. Nikjou "(Invited) Fully integrated AFE for WCDMA." JOURNAL: "ICECS 2003: PROCEEDINGS OF THE 2003 10TH IEEE INTERNATIONAL CONFERENCE ON ELECTRONICS, CIRCUITS AND SYSTEMS, VOLS 1-3." in IEEE International Electronics, Circuits and Systems Conference (ICECS). (12 2003). 930-933 - 930-933.

2002

  • X. Jiang, T. Chang, W. Khalil and B. Nikjou "Design techniques for intrinsic 10-bit high-speed R2R D/A Converter." JOURNAL: ".." in Design & Test Technology Conference (DTTC). (8 2002). . - ..
  • "Analog front end IC for 3G WCDMA." in Symposium on VLSI Circuits. (1 2002).
  • W. Khalil, T. Chang, X. Jiang, and B. Nikjou "Intel’s First Analog front end IC for 3G Wireless Communication." in Design & Test Technology Conference (DTTC). (8 2002).

Unknown

  • Q. Wu, S. Elabd, J. J. McCue, W. Khalil "Analytical and Experimental Study of Tuning Range Limitation in mm-wave CMOS LC-VCOs." in IEEE International Symposium on Circuits and Systems (ISCAS 2013).

Patents

  • W. Khalil S. Balasubramanian. "An Ultra Wideband Digital-to-Analog Converter using Image Replica and Nonlinearity Cancelling Architecture."
  • W. Khalil, J. Volakis, E. Alwan, S. Balasubramanian. "ULTRA-WIDEBAND DIGITAL BEAMFORMER USING ON-SITE CODING TECHNIQUES."
  • 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