• Journals
  
• Conferences
  
• Patents
  
• Demos
  

Journal Papers

• S. Bhattacharyya and D. Graham, “Amplitude-regulated quadrature sine-VCO employing an OTA-C topology,” in IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 70, no. 6, pp. 1886-1890, June 2023.
• S. Andryzcik and D. Graham, “Linearization of voltage-controlled oscillators using floating-gate transistors,” in IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 68, no. 7, pp. 2337-2341, July 2021.
• B. Rumberg, S. Clites, H. Abulaiha, A. DiLello, and D. Graham, “Continuous-time programming of floating-gate transistors for nonvolatile analog memory arrays,” in Journal of Low Power Electronics and Applications, vol. 11, no. 1, 21 pages, January 13, 2021.
• W. Talkington, J. Donai, A. Kadner, M. Layne, A. Forino, S. Wen, S. Gao, M. Gray, A. Ashraf, G. Valencia, B. Smith, S. Khoo, S. Gray, N. Lass, J. Brefczynski-Lewis, S. Engdahl, D. Graham, C. Frum, and J. W. Lewis, “Electrophysiological evidence of early cortical sensitivity to human conspecific mimic-voice as a distinct natural sound category,” in Journal of Speech, Language, and Hearing Research, vol. 63, no. 10, pp. 3539-3559, October 2020.
• S. Bhattacharyya, S. Andryzcik, and D. Graham, "An acoustic vehicle detector and classifier using a reconfigurable analog/mixed-signal platform," in Journal of Low Power Electronics and Applications, vol. 10, no. 1, 22 pages, February 20, 2020.
• M. Navidi and D. Graham, "A regulated charge pump with extremely low output ripple," in Electronics, vol. 8, no. 11, 16 pages, November 3, 2019.
• B. Kelly, A. DiLello, and D. Graham, "Reconfigurable analog preprocessing for efficient asynchronous analog-to-digital conversion," in Journal of Low Power Electronics and Applications, vol. 9, no. 3, 18 pages, August 12, 2019. 
  
• M. Navidi and D. Graham, "A low-power voltage reference cell with a 1.5 V output," in Journal of Low Power Electronics and Applications, vol. 8, no. 2, 12 pages, June 14, 2018. 
  
• B. Rumberg, D. Graham, and M. Navidi, "A regulated charge pump for tunneling floating-gate transistors,” in  IEEE Transactions on Circuits and Systems I, vol. 64, no. 3, pp. 516-527, March 2017.
• A. Dilello, B. Rumberg, and D. Graham, "Multiplexing high-side load switch using adaptive well biasing," in Electronics Letters, vol. 52, no. 12, pp. 1056-1058, June 9, 2016.
• B. Rumberg and D. Graham, "Efficiency and reliability of Fowler-Nordheim tunnelling in CMOS floating-gate transistors," in Electronics Letters, vol. 49, no. 23, pp. 1484-1486, November 7, 2013. 
  
• B. Rumberg and D. Graham, "A low-power and high-precision programmable analog filter bank," in IEEE Transaction on Circuits and Systems II, vol. 59, no. 4, April 2012, pp. 234-238. 
• B. Rumberg and D. Graham, "A low-power magnitude detector for analysis of transient-rich signals," in Journal of Solid-State Circuits, vol. 47, no. 3, March 2012, pp. 676-685. 
  
• B. Rumberg, D. Graham, V. Kulathumani, and R. Fernandez, "Hibernets: Energy-efficient sensor networks using analog signal processing," in IEEE Journal on Emerging and Selected Topics in Circuits and Systems, vol.1, no.3, September 2011, pp. 321-334.  
• A. Singireddy, K. McMillan, and D. Graham, "Compact and low-power continuous-time derivative circuit," in Electronics Letters, vol. 47, no. 17, August 18, 2011, pp. 956-957. 
  
• S. Rapp, K. McMillan, and D. Graham, "SPICE-compatible modelling technique for simulating floating-gate transistors," in Electronics Letters, vol. 47, no. 8, April 14, 2011, pp. 483-485. 
  
• P. Smith, D. Graham, and P. Hasler, "A kappa projection algorithm (KPA) for programming to femtoampere currents in standard CMOS floating-gate elements," in Analog Integrated Circuits and Signal Processing, vol. 56, no. 1-2, August 2008, pp. 83-91.
• D. Graham, P. Hasler, R. Chawla, and P. Smith "A low-power, programmable bandpass filter section for higher-order filter applications," in IEEE Transaction on Circuits and Systems I, vol. 54, no. 6, June 2007, pp. 1165-1176.  
• D. Graham, E. Farquhar, B. Degnan, C. Gordon, and P. Hasler, "Indirect programming of floating-gate transistors," in IEEE Transaction on Circuits and Systems I, vol. 54, no. 5, May 2007, pp. 951-963. 
• P. Hasler, P. Smith, D. Graham, R. Ellis, and D. Anderson, "Analog floating-gate, on-chip auditory sensing system interfaces," in IEEE Sensors Journal, vol. 5, October 2005, pp. 1027-1034.
• S. Ravindran, P. Smith, D. Graham, V. Duangudom, D. Anderson, and P. Hasler, "Towards low-power on-chip auditory processing," in EURASIP Journal on Applied Signal Processing, vol. 2005, no. 7, May 2005, pp. 1082-1092.

Conference Proceedings

• A. Dilello, S. Andryzcik, B. Kelly, B. Rumberg, and D. Graham, "Temperature compensation of floating-gate transistors in field-programmable analog arrays," in Proceedings of the IEEE Symposium on Circuits and Systems, Baltimore, MD, May 2017, pp. 262-265.  
• M. Navidi, D. Graham, and B. Rumberg, "Below-ground injection of floating-gate transistors for programmable analog circuits," in Proceedings of the IEEE Symposium on Circuits and Systems, Baltimore, MD, May 2017, pp. 485-488. 
  
• M. Navidi and D. Graham, "A regulated charge pump for injecting floating-gate transistors," in Proceedings of the IEEE Symposium on Circuits and Systems, Baltimore, MD, May 2017, pp. 2270-2273.
• B. Kelly and D. Graham, "An asynchronous ADC with reconfigurable analog pre-processing," in Proceedings of the IEEE Symposium on Circuits and Systems, Montreal, QC, 2016, pp. 1062-1065.
• B. Rumberg, D. Graham, S. Clites, B. Kelly, M. Navidi, A. Dilello, and V. Kulathumani, "RAMP: Accelerating wireless sensor design with a  reconfigurable analog/mixed-signal platform," in Proceedings of the ACM/IEEE Conference on Information Processing in Sensor Networks, Seattle, WA, April 2015, pp. 47-58. 
  
• B. Rumberg and D. Graham, "A low-power field-programmable analog array for wireless sensing," in Proceedings of the International Symposium on Quality Electronic Design, Santa Clara, CA, March 2015, pp. 542-546.  Winner of Best Paper Award. 
• B. Kelly, B. Rumberg, D. Graham, V. Kulathumani, "Reconfigurable analog signal processing for wireless sensor networks," in Proceedings of the IEEE Midwest Symposium on Circuits and Systems, Columbus, OH, August 2013, pp. 221-224. 
• B. Rumberg and D. Graham, "Reconfiguration costs in analog sensor interfaces for wireless sensing applications," in Proceedings of the IEEE Midwest Symposium on Circuits and Systems, Columbus, OH, August 2013, pp. 321-324. 
• B. Rumberg and D. Graham, "A Floating-Gate Memory Cell for Continuous-Time Programming," in Proceedings of the IEEE Midwest Symposium on Circuits and Systems, Boise, ID, August 2012, pp. 214-217.
  
• B. Kelly, B. Rumberg, and D. Graham, "An Ultra-Low-Power Analog Memory System with an Adaptive Sampling Rate," in Proceedings of the IEEE Midwest Symposium on Circuits and Systems, Boise, ID, August 2012, pp. 302-305.
  
• B. Rumberg, D. Graham, and V. Kulathumani, "A Low-Power, Programmable Analog Event Detector for Resource-Constrained Sensing Systems," in Proceedings of the IEEE Midwest Symposium on Circuits and Systems, Boise, ID, August 2012, pp. 338-341.
  
• B. Rumberg, D. Graham, and V. Kulathumani, "Hibernets: Energy-efficient sensor networks using analog signal processing," in Proceedings of the IEEE/ACM International Conference on Information Processing in Sensor Networks, Stockholm, Sweden, April 2010, pp. 129-139. 
• C. Rea and D. Graham, "Modeling the cochlea: Audio onset detection," in Proceeding of Government Microcircuit Applications and Critical Technology Conference, March 2009, pp. 543-546. 
  
• B. Rumberg, K. McMillan, C. Rea, and D. Graham, “Lateral coupling in silicon cochlear models,”in Proceedings of the IEEE Midwest Symposium on Circuits and Systems, Knoxville, TN, August 2008, pp. 25-28.
• D. Graham and P. Hasler, "Run-time programming of analog circuits using floating-gate transistors," in Proceedings of the IEEE International Symposium on Circuits and Systems, New Orleans, LA, May 2007, pp. 3816-3819. 
  
• V. Srinivasan, D. Graham, and P. Hasler, "Floating-gate transistors for precision analog circuit design: An overview," in Proceedings of the IEEE Midwest Symposium on Circuits and Systems, Covington, KY, August 2005, pp. 71-74.  
• D. Graham, E. Farquhar, B. Degnan, C. Gordon, and P. Hasler, "Indirect programming of floating-gate transistors," in Proceedings of the IEEE International Symposium on Circuits and Systems, Kobe, Japan, May 2005, pp. 2172-2175.
• R. Chawla, D. Graham, P. Smith, and P. Hasler, "A low-power, programmable bandpass filter section for higher-order filter-bank applications," in Proceedings of the IEEE International Symposium on Circuits and Systems, Kobe, Japan, May 2005, pp. 1980-1983. 
  
• D. Graham, P. Smith, R. Ellis, R. Chawla, and P. Hasler, "A programmable bandpass array using floating-gate elements," in Proceedings of the IEEE International Symposium on Circuits and Systems, vol. 1, Vancouver, BC, Canada, May 2004, pp. 97-100.
• P. Smith, D. Graham, R. Chawla, and P. Hasler, "A five-transistor bandpass filter element," in Proceedings of the IEEE International Symposium on Circuits and Systems, vol. 1, Vancouver, BC, Canada, May 2004, pp. 861-864.
• H. Yoo, D. Graham, D. Anderson, and P. Hasler, "C4 bandpass delay filter for continuous- time subband adaptive tapped-delay filter," in Proceedings of the IEEE International Symposium on Circuits and Systems, vol. 5, Vancouver, BC, Canada, May 2004, pp. 792-795.
• P. Smith, D. Graham, and P. Hasler, "Low-power speech processing based upon floating-gate circuits," in Conference Record of the 37th Asilomar Conference on Signals, Systems, and Computers, vol. 2, Pacific Grove, CA, November 2003, pp. 2026-2030.
• D. Anderson, P. Hasler, R. Ellis, H. Yoo, D. Graham, and M. Hans, "A low-power system for audio noise suppression: A cooperative analog-digital signal processing approach," in Proceedings of the IEEE Digital Signal Processing Workshop, Pine Mtn., GA, October 2002, pp. 327-332.
• P. Hasler, P. Smith, R. Ellis, D. Graham, and D. Anderson, "Biologically inspired auditory sensing system interfaces on a chip," in Proceedings of the IEEE Sensors, vol. 1, Orlando, FL, June 2002, pp. 669-674.
• D. Graham and P. Hasler, "Capacitively coupled current conveyor second-order section for continuous-time bandpass filtering and cochlea modeling," in Proceedings of the IEEE International Symposium on Circuits and Systems, vol. 5, Scottsdale, AZ, May 2002, pp. 485-488.
• R. Ellis, H. Yoo, D. Graham, P. Hasler, and D. Anderson, "A continuous-time speech enhancement front-end for microphone inputs," in Proceedings of the IEEE International Symposium on Circuits and Systems, vol. 2, Scottsdale, AZ, May 2002, pp. 728-731.
• T. Massengill, D. Wilson, P. Hasler, and D. Graham, "Empirical comparison of analog and digital auditory preprocessing for automatic speech recognition," in Proceedings of the IEEE International Symposium on Circuits and Systems, vol. 5, Scottsdale, AZ, May 2002, pp. 77-80.

Patents

• B. Rumberg and D. Graham, "Analog voice activity detection," U.S. Patent No. 10535365, January 14, 2020.
• V. Kulathumani, D. Graham, and B. Rumberg, "Selective wakeup of digital sensing and processing systems using reconfigurable analog circuits," U.S. Patent No. 10088893, October 2, 2018.
• B. Rumberg and D. Graham, "Analog voice activity detection," U.S. Patent No. 10090005, October 2, 2018.
• B. Kelly, B. Rumberg, and D. Graham, "Compressed sampling and memory," U.S. Patent No. 9977489, May 22, 2018.
• B. Rumberg and D. Graham, "Continuous-time floating gate memory cell programming," U.S. Patent No. 9679654, June 13, 2017.
• V. Kulathumani, D. Graham, and B. Rumberg, "Selective wakeup of digital sensing and processing systems using reconfigurable analog circuits," U.S. Patent No. 9679093, June 13, 2017.
• B. Kelly, B. Rumberg, and D. Graham, "Compressed sampling and memory," U.S. Patent No. 9367079, June 14, 2016. 
  
• B. Rumberg and D. Graham, "Continuous-time floating gate memory cell programming," U.S. Patent No. 9218883, December 22, 2015.
• R. Ellis, H. Yoo, D. Graham, P. Hasler, and D. Anderson, "Analog audio signal enhancement system using a noise suppression algorithm," U.S. Patent No. 7590250, September 15, 2009. 
• D. Graham, E. Farquhar, J. Gray, C. Twigg, B. Degnan, C. Gordon, D. Abramson, and P. Hasler, "Systems and methods for programming floating-gate transistors," U.S. Patent No. 7269046, September 11, 2007.

Conference Demonstrations

• B. Kelly, B. Rumberg, D. Graham, V. Kulathumani, S. Clites, A. Dilello, and M. Navidi, "Demonstration Abstract: RAMP: Accelerating Wireless Sensor Hardware Design with a Reconfigurable Analog/Mixed-Signal Platform," in Proceedings of the ACM/IEEE Conference on Information Processing in Sensor Networks, Seattle, WA, April 2015, pp 402-403. 
  
• B. Rumberg, B. Kelly, D. Graham, and V. Kulathumani, "Demo Abstract: Netamorph: Field-programmable analog arrays for energy-efficient sensor networks," in Proceedings of the ACM/IEEE Conference on Information Processing in Sensor Networks, Philadelphia, PA, April 2013, pp. 309-310. 
• B. Rumberg, D. Graham, and V. Kulathumani, "Demo Abstract: Hibernets: Energy-efficient sensor networks using analog signal processing," in Proceedings of the IEEE/ACM International Conference on Information Processing in Sensor Networks, Stockholm, Sweden, April 2010, pp. 442-443.