- Research Associate University of California 1156 High Street Santa Cruz, CA 95064 Phone: (831) 459-5766 * Email: mingcui AT soe.ucsc.edu
Mingcui Zhou got her BE in Electrical Eng., Shanghai JiaoTong Univ. in 2002. She is currently a graduate student in Dept. of Electrical Engineering, Univ. of California, Santa Cruz. Her current research topic is wireless data transmission for Retinal Prosthesis, a project which aims to restore vision to blind people by stimulating the retina using an electrode array. She also worked on SRC (Semiconductor Research Corporation) project, which aims to achieve low power, robust global signaling schemes.
The pictures below are the chip die, testing board, and the testing system respectively. The chip is fabricated in 0.35 um process in NSC. The chip can recover 1-2Mbps DPSK signal under the strong interference from the power telemetry without a high order filter.
The pictures below show the test results from the oscilloscope. From the top to bottom, the waveforms are modulated DPSK signal at the input of the demodulator, differential outputs of the integrator, and the demodulated binary data. The arrows in left picture indicate the relationship between each waveform. When there is a phase shift, the integrator integrated the difference between the current symbol and the previous symbol, and depending on the output of the integrator, a bit slicer decides the binary data. The circled parts in the right picture indicate 180o phase shifts which represent “1” for DPSK signal. The test results show that the demodulator can recover the data correctly despite the strong interference (1MHz) from the power telemetry.
Publications
Conference Publications:
1. M. Zhou, W. Liu, "A Non-Coherent PSK Receiver with Interference Cancellation for Transcutaneous Neural Implant,” ISSCC Digest of Technical Papers, pp. 156-157 , Feb. 2007.
2. M. Zhou, W. Liu, G. Wang, M. Sivaprakasam, M. Yuce, J. D. Weiland and M. S. Humayun, “A Transcutaneous Data Telemetry System Tolerant to Power Telemetry Interference”, to be appeared in Annual International Conference of the IEEE EMBS, September 2006.
3. G. Wang, W. Liu, M. Sivaprakasam, M. Zhou, J. D. Weiland and M. S. Humayun, “A Wireless Phase Shift Keying Transmitter with Q-Independent Phase Transition Time,” Annual International Conference of the IEEE EMBS, September 2005.
4. M. Zhou, W. Liu, and M. Sivaprakasam, “A Closed-Form Delay Formula for On-Chip RLC Interconnects in Current-Mode Signaling,” Proceedings of the IEEE International Symposium on Circuits and Systems, Pages: 1082 – 1085, May 2005.
5. W. Liu, M. Sivaprakasam, G. Wang, M. Zhou, J. D. Weiland, and M. S. Humayun, “Microelectronics for an Implantable Epiretinal Prosthesis”, Association for Research in Vision and Ophthalmology Annual Meeting, Abstract B295, May 2005.
6. W. Liu, M. Sivaprakasam, G. Wang, M. Zhou, J. D. Weiland, M. S. Humayun, Challenges in Realizing a Chronic High Resolution Artificial Sight Device,” U.S. Department of Energy (DOE) International Symposium on Artificial Sight, April 2005. (Invited)
7. M. Sivaprakasam, W. Liu, G. Wang, M. Zhou, J. D. Weiland, and M. S. Humayun, “Architecture Tradeoffs in High Density Microstimulators for Retinal Prosthesis,” Proceedings of the International IEEE EMBS Conference on NeuralEngineering, Pages: 466 – 469, March 2005.
Journal Publications:
1. W. Liu, M. Sivaprakasam, G. Wang, M. Zhou, J. Granacki, J. LaCoss, and J. Wills, “Microelectronics Design for Implantable Wireless Biomimetic Microelectronic systems,” IEEE Engineering in Medicine and Biology Magazine, Volume: 24, Pages: 66 – 74, September 2005.
Book Chapters/Articles:
1. W. Liu, M. Sivaprakasam, G. Wang, M. Zhou, J. D. Weiland, and M. S. Humayun, “Challenges in realizing a Chronic High Resolution Artificial Sight Device,” To appear in Artificial Sight, M. S. Humayun, J. D. Weiland, E.Greenbaum, Eds. Biological and Medical Physics/Biomedical Engineering Series, New York: Springer. (Invited)
2. W. Liu, M. Sivaprakasam, G. Wang, M. Zhou, J. D. Weiland, and M. S. Humayun, “Development of an Intraocular Prosthesis to Benefit the Visually Impaired,” To appear in Visual Prosthetics and Ophthalmic Devices: New Hope in Sight, New Jersey: Humana Press, Inc. (Invited)
3. W. Liu, M. Sivaprakasam, G. Wang, M. Zhou, and M. S. Humayun, “Semiconductor based Implantable Prosthetic Devices,” To appear in WileyHandbook of Biomedical Engineering, New Jersey: John Wiley and Sons, Inc. (Invited)
Invention Disclosures:
1. “An interference-immune DPSK receiver without high-order filters for bio-implantable devices.” UCSC invention disclosure, June 2005.
