Professor Rahul Sarpeshkar
Analog VLSI and Biological Systems Group Publications
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Selected Publications
    2009

  1. L. Turicchia, S. Mandal, M. Tavakoli, L. Fay, V. Misra, J. Bohorquez, W. Sanchez, and R. Sarpeshkar, "Ultra-low-power Electronics for Non-invasive Medical Monitoring," Invited Paper, Proceedings of the IEEE Custom Integrated Circuits Conference (CICC 2009), San Jose, California, USA, September 13-16, 2009. DOI: 10.1109/CICC.2009.5280892
  2. S. Mandal, L. Turicchia, R. Sarpeshkar, "A Battery-Free Tag for Wireless Monitoring of Heart Sounds," Proceedings of the 6th International Workshop on Wearable and Implantable Body Sensor Networks (BSN 2009), Berkeley, CA, USA, June 2009. DOI: 10.1109/BSN.2009.11
  3. S. Mandal and R. Sarpeshkar, "Log-Domain Circuit Models of Chemical Reactions," Proceedings of the IEEE International Symposium on Circuits and Systems (ISCAS), Taipei, Taiwan, May 2009, pp. 2697-2700.
  4. S. K. Arfin, S. Mandal and R. Sarpeshkar, "Dynamic-Range Analysis and Maximization of Micropower Gm–C Bandpass Filters by Adaptive Biasing," Proceedings of the IEEE International Symposium on Circuits and Systems (ISCAS), Taipei, Taiwan, May 2009, pp. 2954-2957.
  5. S. K. Arfin, M. A. Long, M. S. Fee, and R. Sarpeshkar, "Wireless Neural Stimulation in Freely Behaving Small Animals," Journal of Neurophysiology, Vol. 102, No. 1, pp. 598-605, July 2009. [supplementary material]
  6. S. Mandal, S. Zhak, and R. Sarpeshkar, "A Bio-Inspired Active Radio-Frequency Silicon Cochlea," IEEE Journal of Solid-State Circuits, Vol. 44, No. 6, pp. 1814-1828, June 2009.
  7. Sarpeshkar, R. "Neuromorphic and biomorphic engineering systems." McGraw-Hill Yearbook of Science & Technology 2009. New York: McGraw-Hill, 2009. pp. 250-252.
  8. S. Mandal, S. K. Arfin, and R. Sarpeshkar, "Sub-uHz MOSFET 1/f noise measurements," Electronics Letters, Vol. 45, No. 1, pp. 81-82, January 1 2009.

    2008

  9. R. Sarpeshkar, W. Wattanapanitch, S. K. Arfin, B. I. Rapoport, S. Mandal, M. W. Baker, M. S. Fee, S. Musallam, and R. A. Andersen,"Low-Power Circuits for Brain-Machine Interfaces," IEEE Transactions on Biomedical Circuits and Systems, Vol. 2, No. 3, pp. 173-183, 2008.
  10. K. H. Wee and R. Sarpeshkar, "An electronically tunable linear or nonlinear MOS resistor," IEEE Transactions on Circuits and Systems I, Vol. 55, No. 9, pp. 2573-2583, October 2008.
  11. J. Sit and R. Sarpeshkar, "A Cochlear-Implant Processor for Encoding Music and Lowering Stimulation Power," IEEE Pervasive Computing--special issue on implantable electronics, Vol. 1, No. 7, pp. 40-48, 2008.
  12. S. Mandal and R. Sarpeshkar, "Power-Efficient Impedance-Modulation Wireless Data Links for Biomedical Implants," IEEE Transactions on Biomedical Circuits and Systems, Vol.2, No. 4, pp. 301-315, 2008.
  13. K. H. Wee and L. Turicchia and R. Sarpeshkar, "An Analog Integrated-Circuit Vocal Tract," IEEE Transactions on Biomedical Circuits and Systems, Vol.2, No. 4, pp. 316-327, 2008.
  14. L. Turicchia, M. O’Halloran, D. P. Kumar, and R. Sarpeshkar, "A Low-Power Imager and Compression Algorithms for a Brain-Machine Visual Prosthesis for the Blind," Invited Paper, Proceedings of the SPIE, Vol. 7035, pp. 703510-1:703510-13, San Diego, 10-14 August 2008.
  15. J. Bohorquez, W. Sanchez, L. Turicchia, and R. Sarpeshkar, "An Integrated-Circuit Switched-Capacitor Model and Implementation of the Heart," Invited Paper, Proceedings of the First International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL), pp. 1-5, Aalborg, Denmark, 25-28 October 2008.

    2007

  16. W. Wattanapanitch, M. Fee and R. Sarpeshkar, "An Energy-Efficient Micropower Neural Recording Amplifier," IEEE Transactions on Biomedical Circuits and Systems, vol. 1, No. 2, pp. 136-147, June 2007.
  17. R. Sarpeshkar, W. Wattanapanitch, B. Rapoport, S. K. Arfin, M. W. Baker, S. Mandal, M. Fee, S. Musallam, and R. Andersen, "Low-Power Circuits for Brain-Machine Interfaces," Proceedings of the IEEE Symposium on Circuits and Systems (ISCAS 2007), pp. 2068-2071, May 2007.
  18. J. Sit and R. Sarpeshkar, "A low-power, blocking-capacitor-free, charge-balanced electrode-stimulator chip with less than 6nA DC error for 1mA full-scale stimulation," IEEE Transactions on Biomedical Circuits and Systems,  Vol. 1, No. 3,  pp. 172-183, September 2007.
  19. S. Mandal and R. Sarpeshkar, “Low Power CMOS Rectifier Design for RFID Applications,” IEEE Transactions on Circuits and Systems I, Vol. 54, No. 6, pp. 1177-1188, June 2007.
  20. M. W. Baker and R. Sarpeshkar, “Feedback Analysis and Design of RF Power Links for Low-Power Bionic Systems,” invited paper, IEEE Transactions of Biomedical Circuits and Systems, Vol. 1, No. 1, pp. 28—38, April 2007.
  21. J. Sit, A. M. Simonson, A. J. Oxenham, M. A. Faltys, and R. Sarpeshkar, “A low-power asynchronous interleaved sampling algorithm for cochlear implants that encodes envelope and phase information”, IEEE Transactions on Biomedical Engineering, Vol. 54, pp. 138-149, 2007.
  22. S. Mandal and R. Sarpeshkar, A Bidirectional Wireless Link for Neural Prostheses that Minimizes Implanted Power Consumption, Proceedings of the IEEE Biomedical Circuits and Systems Conference (BioCAS), pp. 45-48, 2007.
  23. A. J. Oxenham, A. M. Simonson, L. Turicchia, and R. Sarpeshkar, "Evaluation of Companding-Based Spectral Enhancement Using Simulated Cochlear-Implant Processing," Journal of the Acoustical Society of America, Vol. 121, No. 3, pp. 1709-1716, 2007.
  24. B. Raj, L. Turicchia, B. Schmidt-Nielsen, and R. Sarpeshkar, "An FFT-based Companding Front End for Noise-Robust Automatic Speech Recognition," EURASIP Journal on Audio, Speech, and Music Processing, special issue on Perceptual Models for Speech, Audio, and Music Processing, Article ID 65420, 13 pages, 2007.

    2006

  25. H. Yang and R. Sarpeshkar, “A Bio-inspired Ultra-Energy-Efficient Analog-to-Digital Converter for Biomedical Applications”, IEEE Transactions on Circuits and Systems I, special issue on Life Sciences and System Applications, Vol. 53, No. 11, pp. 2349-2356, November 2006.
  26. M. Baker and R. Sarpeshkar, “Low-Power Single Loop and Dual-Loop AGCs for Bionic Ears,” IEEE Journal of Solid-State Circuits, Vol. 41, No. 9, pp 1983—1996, September 2006.
  27. R. Sarpeshkar, "Brain Power: Borrowing from Biology Makes for Low-Power Computing," IEEE Spectrum, invited paper, Vol. 43, Issue 5, pp. 24-29, May 2006.
  28. M. O'Halloran and R. Sarpeshkar, “An Analog Storage Cell with 5 electron/sec Leakage,” Proceedings of the IEEE International Symposium on Circuits and Systems (ISCAS), Kos, Greece, pp. 557-560, 2006.
  29. B. Kim , S. Mandal, and R. Sarpeshkar, “Power-adaptive Operational Amplifier with Positive-Feedback Self Biasing,” Proceedings of the IEEE International Symposium on Circuits and Systems (ISCAS), Kos, Greece, pp. 4883-4886, 2006.
  30. S. Mandal, S. Zhak, and R. Sarpeshkar, "Circuits for an RF Cochlea", Proceedings of the International Symposium on Circuits and Systems (ISCAS), Kos, Greece, pp 3610-3613, May 21-24, 2006.
  31. R. Sarpeshkar, "Ultra Low Power Electronics for Medicine", Proceedings of the International Workshop on Wearable and Implantable Body Sensor Networks (BSN 2006), 3-5 April 2006, p. 37
  32. T. Lu, S. Zhak, P. Dallos, and R. Sarpeshkar, “Fast Cochlear Amplification with Slow Outer Hair Cells”, Hearing Research, Vol. 214, Issues 1-2, pp. 45-67, April 2006.

    2005

  33. H. Yang and R. Sarpeshkar, “A Time-Based Energy-Efficient Analog-to-Digital Converter”, IEEE Journal of Solid-State Circuits, Vol. 40, No. 8, pp. 1590-1601, August 2005.
  34. L. Turicchia and R. Sarpeshkar, “A Bio-Inspired Companding Strategy for Spectral Enhancement,” IEEE Transactions on Speech and Audio Processing, Vol. 13, No. 2, pp. 243-253, March 2005.
  35. R. Sarpeshkar, M. Baker, C. Salthouse, J.J. Sit, L. Turicchia, and S. Zhak, “An Analog Bionic Ear Processor with Zero-Crossing Detection,” Proceedings of the IEEE International Solid State Circuits Conference (ISSCC), San Francisco, CA, Paper 4.2, pp. 78-79, February 6-10, 2005.
  36. R. Sarpeshkar, C. Salthouse, J.J. Sit, M. Baker, S. Zhak, T. Lu, L. Turicchia, and S. Balster,  “An Ultra-Low-Power Programmable Analog Bionic Ear Processor,” IEEE Transactions on Biomedical Engineering, Vol. 52, No. 4, pp. 711-727, April 2005.

    2004

  37. S. M. Zhak, S. Mandal, and R. Sarpeshkar, "A Proposal for an RF Cochlea", invited paper, Proceedings of the Asia Pacific Microwave Conference, New Delhi, India, 4 pages, December 15-18, 2004.
  38. J.J. Sit and R. Sarpeshkar, “A Micropower Logarithmic A/D with Offset and Temperature Compensation,” IEEE Journal of Solid State Circuits, Vol. 39, No. 2, pp. 308-319, 2004.
  39. M. O'Halloran and R. Sarpeshkar, "A 10nW 12-bit Accurate Analog Storage Cell with 10aA Leakage,” IEEE Journal of Solid-State Circuits, Vol. 39, No. 11, pp. 1985-1996 November 2004.

    2003

  40. M. Tavakoli and R. Sarpeshkar, “An Offset-Canceling Low-Noise Lock-in Architecture for Capacitive Sensing,”  IEEE Journal of Solid State Circuits, Vol. 38, No. 2,  pp. 244-253, 2003.
  41. A. MeVay and R. Sarpeshkar, “Predictive Comparators with Adaptive Control,” IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing, Vol. 50, No. 10 pp. 579-588, 2003.
  42. M. Baker and R. Sarpeshkar, “A Low-Power High-PSRR Current Mode Microphone Preamplifier,” IEEE Journal of Solid State Circuits, Vol. 38, No. 10 pp. 1671-1678, 2003.
  43. C. Salthouse and R. Sarpeshkar, “A Practical Micropower Programmable Bandpass Filter for use in Bionic Ears,” IEEE Journal of Solid State Circuits, Vol. 38, No. 1, pp. 63-70, 2003.
  44. S. Zhak, M. Baker, and R. Sarpeshkar, “A Low Power Wide Dynamic Range Envelope Detector,” IEEE Journal of Solid State Circuits, vol. 38 (10), pp.1750-1753, 2003.

    2002

  45. R. Sarpeshkar and M. O’Halloran, “Scalable Hybrid Computation with Spikes,” Neural Computation, Vol. 14, No. 9, pp. 2003-2024, September 2002.

    2000

  46. R. Hahnloser, R. Sarpeshkar, M. Mahowald, R. Douglas, and S. Seung, “Digital Selection and Analogue Amplification Coexist in a cortex-inspired silicon circuit,” Nature, Cover article, Vol. 405, pp. 947-951, 22 June 2000.
  47. B. Crone , A. Dodabalapur, Y. Y. Lin, R. W. Filas, Z. Bao, A. LaDuca, R. Sarpeshkar, H. E. Katz, and W. Li, “Large Scale Complementary Integrated Circuits Based on Organic Transistors,” Nature, Vol. 403, pp. 521-523, 3rd February 2000.

    Pre-1999

  48. R. Sarpeshkar, “Analog Versus Digital:  Extrapolating from Electronics to Neurobiology,” Neural Computation, Vol. 10, pp. 1601-1638, 1998.
  49. R. Sarpeshkar, Efficient Precise Computation with Noisy Components: Extrapolating From an Electronic Cochlea to the Brain, Ph.D. Thesis, California Institute of Technology, Pasadena, CA, 1997.
  50. R. Sarpeshkar, R.F. Lyon, and C.A. Mead, “A Low-Power Wide-Dynamic-Range Analog VLSI Cochlea,” Analog Integrated Circuits and Signal Processing, Vol. 16, pp. 245-274, 1998.
  51. R. Sarpeshkar, R.F. Lyon, and C.A. Mead, “A Low-Power Wide-Linear-Range Transconductance Amplifier,” Analog Integrated Circuits and Signal Processing, Vol. 13, pp. 123-151, 1997.
  52. R. Sarpeshkar, J. Kramer, G. Indiveri, and C. Koch, “Analog VLSI Architectures for Motion Processing: From Fundamental Limits to System Applications,” Invited Paper, Proceedings of the IEEE, Vol. 84, No. 7, pp. 969-987, 1996.
  53. R. Sarpeshkar , T. Delbruck, and C.A. Mead, “White Noise in MOS Transistors and Resistors,” IEEE Circuits and Devices, Vol. 9, No. 6, pp. 23-29, 1993.
  54. R. Sarpeshkar, L. Watts, and C.A. Mead, “Refractory Neuron Circuits,” Computation and Neural Systems Technical Report, CNS TR-92-08, California Institute of Technology, 29 pages, 1992.

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