team

Qadeer Ahmad

Assistant Professor

Ph.D.  degree in electrical and computer engineering from Oregon State University, Corvallis, OR, USA, in 2012

Bachelor's degree  in electronics and communication engineering from Jamia Millia Islamia University, New Delhi, India, in 1999

044-2257 4484

qkhan@ee.iitm.ac.in

Personal Link

  • I am an assistant professor in the VLSI group of the department of Electrical Engineering, Indian Institute of Technology Madras. I received the Bachelor's degree in electronics and communication engineering from Jamia Millia Islamia University, New Delhi, India, in 1999 and the Ph.D. degree in electrical and computer engineering from Oregon State University, Corvallis, OR, USA, in 2012. My Ph.D work, under the guidance of Prof. Pavan Kumar Hanumolu, was focused on developing integrated circuits for high performance switching DC-DC converters.
  • From 2012 to 2015, I worked as a Staff Engineer, Power Management Systems with Qualcomm, San Diego and from 2015 to 2016 with Qualcomm, Bangalore where I was involved in defining system and architecture of various power modules for snapdragon chipsets catering to different smartphone markets. From 1999 to 2005, I worked with Motorola and Freescale Semiconductor, India, where my main responsibilites were designing mixed-signal circuits for baseband and network processors and full-chip integrated solutions for high-voltage motor drives. I hold 16 U.S. patents and 20 IEEE publications in the area of analog, mixed-signal and power management ICs. My research interests involve high-performance switching dc-dc converters and power management ICs for portable electronics and energy harvesting.

  • High Performance Switching DC-DC Converters.
  • Low Drop-Out (LDO) Regulators.
  • Energy Harvesting for IoT.
  • Power Converters and Drivers for Display and Lighting.
  • Battery Chargers and Fuel Gauge.
  • Motor and Haptics Driver.

  • Serving as reviewer for IEEE Transaction on Power Electronics, IEEE Journal of Solid-State Circuits, and IEEE Transaction on VLSI Systems for Power Management related papers.
  • Paper selected among top 10 in worldwide Qualcomm's internal Technology Forum.
  • Received 3 different recognitions from Qualcomm for outstanding contribution in various projects.
  • Served as reviewer for International Conference on VLSI Design, India from 2003 to 2006.
  • Chaired a session on analog circuits in 10th International Symposium on Integrated Circuits, Devices and Systems, Singapore, Sept 2004.
  • Received BRAVO award from Freescale India for outstanding contribution to Network Processor Chip.
  • Received BRAVO award from Freescale India for outstanding contribution to Baseband Processor Chip.
  • Received 3rd prize for presenting paper entitled Digital Clock Frequency Doubler in 5th Freescale India technical symposium held in Mar 2005.
  • Received 2nd prize for presenting paper entitled Tunable gm-C filter with low variation across Process, Voltage & Temperature in fourth Motorola India technical symposium held in Nov 2003.
  • Received BRAVO award for from Motorola for successful completion of a low power motor driver chip.
  • Received BRAVO award from Motorola for getting first pass silicon success of MPC175xx series of motor driver ICs.
  • Received 1 st prize for presenting paper entitled Fire Driver Circuit for an inkjet color printer in SmartMOS technology in third Motorola India technical symposium held in Oct 2002.
  • Received 3rd prize for presenting paper entitled Optimized Realization of Kerwin-Huelsman-Newcomb biquadratic filter using Current Conveyors in the first Motorola India technical symposium held in Dec 2000.
  • Received Merit Scholarship from Jamia Millia Islamia in 1995.
  • Received CWC Scholarship from CWC, India in undergraduate studies during 1995-1999.

    Current Courses

  • EE5325:VLSI Power Management Circuits.
  • EE2019:Analog Systems and Lab.

Journals

  • S J Kim, R K Nandwana, Q Khan, R Pilawa-Podgurski, and P K Hanumolu, A 4-phase 30-70 MHz switching frequency buck converter using a time-based compensator, IEEE J Solid-State Circuits, vol 50, no 12, pp 2814-2824, Dec 2015.
  • S J Kim, Q Khan, M Talegaonkar, A Elshazly, A Rao, N Griesert, G Winter, W McIntyre, and P K Hanumolu, High frequency buck converter design using time-based control techniques, IEEE J Solid-State Circuits,vol 50, no 4, pp 990-1001, Apr 2015.
  • S Rao Q Khan, S Bang, D Swank, A Rao, W McIntyre, P K Hanumolu, A Buck-Boost LED Driver With On-Chip Error Averaged SenseFET-Based Current Sensing Technique, IEEE Journal of Solid-State Circuits, Volume: 46, Issue: 12, pp 2772- 2783, Dec 2011.

Conference Proceedings

  • S J Kim; R K Nandwana, Q Khan, R Pilawa-Podgurski, P K Hanumolu, A 1,8V 30-to-70MHz 87% Peak Efficiency 0,32mm2 4-Phase Time-Based Buck Converter Consuming 3uA/MHz Quiescent Current in 65nm CMOS, 2015 IEEE International Solid-State Circuits Conference Digest of Technical Papers (ISSCC), San Francisco, 22-26 Feb 2015.
  • Q Khan, S J Kim; M Talegaonkar, A Elshazly, A Rao, N Griesert, G Winter, W McIntyre and P K Hanumolu, A 10-25MHz, 600mA buck converter using time-based PID compensator with 2uA/MHz quiescent current, 94% peak efficiency, and 1MHz BW, VSLI Symp, June 2014, Honolulu.
  • Q Khan, A Elshazly, S Rao,R Inti and P K Hanumolu, A 900mA 93% Efficient 50uA Quiescent Current Fixed Frequency Hysteretic Buck Converter Using a Highly Digital Hybrid Voltage- and Current-mode Control, VSLI Symp, June 2012, Honolulu.
  • Q Khan, S Rao, D Swank, A Rao, W McIntyre, S Bang, P K Hanumolu, A 3,3V 500mA Digital Buck-Boost Converter with 92% Peak Efficiency Using Constant ON/OFF Time Delta-Sigma Fractional-N Control, 37th European Solid-State Circuits Conference (ESSCIRC), 12-16 Sept 2011, Helsinki, Finland.
  • S Rao Q Khan, S Bang, D Swank, A Rao, W McIntyre, P K Hanumolu, A 1,2A buck-boost LED driver with 13% efficiency improvement using error-averaged SenseFET-based current sensing, 2011 IEEE International Solid-State Circuits Conference Digest of Technical Papers (ISSCC), San Francisco, 20-24 Feb 2011.
  • S Bang, D Swank, A Rao, W McIntyre, Q Khan, P K Hanumolu, A 1,2A 2MHz Tri-Mode Buck-Boost LED Driver With Feed-Forward Duty Cycle Correction, IEEE Custom Integrated Circuit Conference (CICC-2010), San Jose, California September 2010.
  • K Jayaraman, Q Khan, B Chi, W Beattie, Z Wang, P Chiang, A Self-Healing 2,4GHz LNA with On-Chip S11S21 Measurement Calibration for In-Situ PVT Compensation, Radio Frequency Integrated Circuits (RFIC) Symposium, Anaheim, CA, May 2010.
  • Q Khan, G K Siddhartha, A Sequence Independent Power-on-Reset Circuit for Multi-Voltage Integrated Systems, 2006 IEEE International Symposium on Circuits and Systems (ISCAS-2006), Mar, 2006, Greece.
  • Q Khan, G K Siddhartha, D Tripathi, S K Wadhwa, K Misri, Techniques for on-chip Process, Voltage and Temperature Detection and Compensation, 19th International Conference on VLSI Design, Jan 2006, India.
  • Q Khan, S K Wadhwa, K Misri, A single Supply Level Shifter for Multi-Voltage Systems, 19th International Conference on VLSI Design Jan 2006, India.

Patents

  • M Bansal, Q Khan, C Shi, Average current mode control of multi-phase switching power converters, US 9,442,140, Sep 13, 2016.
  • Q Khan, S Dhar, J Zazzera, T Sutton, Circuits and Methods for Driving Resonant Actuators, US 9,344,022, May 17, 2016.
  • Q Khan, S Wadhwa, D Tripathi, G K Sidhartha, K Misri, PVT Variation Detection and Compensation Circuit, US 7495465, Feb 24, 2009.
  • D Tripathi, G K Sidhartha, Q Khan, K Misri, S Wadhwa, US 7446592, PVT Variation Detection and Compensation Circuit, Nov 4, 2008.
  • Q Khan, G K Sidhartha, Sequence-independent Power-on Reset for Multi-Voltage Circuits, US 7432748, Oct 7, 2008.
  • D Tripathi, J Banerjee, Q Khan, Differential Receiver Circuit, US 7414462, Aug 19, 2008.
  • S Gupta, Q Khan, Miller Capacitance Tolerant Buffer Element, US 7400172, Jul 15, 2008.
  • Q Khan, H Fukazawa, T Nandurkar, Charge Pump Circuit for High Side Drive Circuit and Driver Driving Voltage Circuit, US 7388422, Jun 17, 2008.
  • G K Sidhartha, Q Khan, D Tripathi, S Wadhwa, K Misri, PVT Variation Detection and Compensation Circuit, US 7388419, Jun 17, 2008.
  • Q Khan, D Tripathi, Transmission Line Driver Circuit, US 7292073, Nov 6, 2007.
  • D Tripathi, Q Khan, K Misri, Transmission Line Driver, US 7187197, Mar 6, 2007.
  • S Wadhwa, Q Khan, K Misri, D Muhury, Digital Clock Frequency Doubler, US 7132863, Nov 7, 2006.
  • Q Khan, D Tripathi, K Misri, High Voltage Level Converter Using Low Voltage Devices, US 7102410, Sep 5, 2006.
  • Q Khan, S Wadhwa, K Misri, Bandgap Reference Circuit, US 7084698, Aug 1, 2006.
  • Q Khan, S Wadhwa, K Misri, Bidirectional Level Shifter, US 7061299, Jun, 13, 2006.
  • Q Khan, S Wadhwa, K Misri, Single Supply Level Shifter, US 7009424, Mar 7, 2006.
  • S Wadhwa, Q Khan, K Misri, Switched Capacitor Current Reference Circuit, US 6784725, Aug 31, 2004.
DEPARTMENT OF Electrical Engineering
Indian Institute of Technology Madras
Chennai, Tamil Nadu, India.
PIN-Code : 600036
Phone: +91-44-2257 4400
Fax: +91-44-22574402
Email:eeoffice@ee.iitm.ac.in
© 2023-All rights reserved.DEPARTMENT OF Electrical Engineering || Website Credits