Wireless implantable microsystems: High-density electronic interfaces to the nervous system

Proceedings of the IEEE

Volumn 92, Issue 1, 2004, Pages 76-97

  Wise, K D ^a   Anderson, D J ^a   Hetke, J F ^a   Kipke, D R ^a   Najafi, K ^a  

^a UNIVERSITY OF MICHIGAN   (United States)

Author keywords

Microelectrodes; Microfluidics; Micromachining; Microsystems; Nervous system; Neural implants; Sensors

Indexed keywords

DISEASES; FLUIDICS; FREQUENCIES; MICROMACHINING; NEUROLOGY; SENSORS; WIRELESS TELECOMMUNICATION SYSTEMS;

CELLULAR LEVELS; MICROFLUIDICS; MICROSYSTEMS; NEURAL IMPLANTS;

MICROELECTRODES;

EID: 2442708539     PISSN: 00189219     EISSN: None     Source Type: Journal    
DOI: 10.1109/JPROC.2003.820544     Document Type: Conference Paper

References (127)

1. B. Franklin, "An account of the effects of electricity in paralytic cases," Philos. Trans., vol. 50, pp. 481-183, 1759.
2. R. C. Gesteland, B. Howland, J. Y. Lettvin, and W. H. Pitts, "Comments on microelectrodes," Proc. IRE, vol. 47, pp. 1856-1862, 1959.
3. C. A. Terzuolo and T. Araki, "An analysis of intra-versus extra-cellular potential changes associated with activity of single spinal motoneurons," Ann. NY Acad. Sci., vol. 94, pp. 547-558, 1963.
4. M. Verseano and K. Negishi, "Neuronal activity in cortical and thalamic networks," J. Gen. Physiol., vol. 43, pp. 177-195, 1960.
5. M. A. Nicolelis, A. A. Ghazanfar, B. M. Faggin, S. Votaw, and L. M. Oliveira, "Reconstructing the engram: Simultaneous, multisite, many single neuron recordings," Neuron, vol. 18, pp. 529-537, Apr. 1997.
6. J. C. Williams, R. L. Rennaker, and D. R. Kipke, "Long-term neural recording characteristics of wire microelectrode arrays implanted in cerebral cortex," Brain Res. Protocols, vol. 4, pp. 303-313, Dec. 1999.
7. I. Porada, I. Bondar, W. B. Spatz, and J. Kruger, "Rabbit and monkey visual cortex: More than a year of recording with up to 64 microelectrodes, " J. Neurosci. Methods, vol. 95, pp. 13-28, 1999.
8. M. P. Lepselter, "Beam-lead technology," Bell Syst. Tech. J., vol. 45, pp. 233-254, Feb. 1966.
9. K. D. Wise, J. B. Angell, and A. Starr, "An integrated circuit approach to extracellular microelectrodes," in Dig. 8th Int. Conf. Engineering Medicine and Biology, 1969, p. 14.5.
10. _, "An integrated circuit approach to extracellular microelectrodes," IEEE Trans. Biomed. Eng., vol. BME 17, pp. 238-247, July 1970.
11. K. D. Wise and J. B. Angell, "A low-capacitance multielectrode probe for use in extracellular neurophysiology," IEEE Trans. Biomed. Eng., vol. BME-22, pp. 212-219, May 1975.
12. W. F. House and K. I. Berliner. "Cochlear implants: From idea to clinical practice," in Cochlear Implants: A Practical Guide, H. Cooper, Ed. San Diego, CA: Singular, 1991, pp. 9-33.
13. F. B. Simmons, "Electrical stimulation of the auditory nerve in man," Arch. Otolaryng., vol. 84, pp. 2-54, 1966.
14. F. B. Simmons, C. J. Mongeon, W. R. Lewis, and D. A. Huntington, "Electrical stimulation of acoustical nerve and inferior colliculus: Results in man," Arch. Otolaryngol., vol. 79, pp. 559-567, 1964.
15. G. S. Brindley and W. S. Lewin, "The sensations produced by electrical stimulation of the visual cortex," J. Physiol., vol. 196, pp. 479-493, May 1968.
16. F. A. Spelman, "The past, present, and future of cochlear prostheses," IEEE Eng. Med. Biol Mag., pp. 27-33, May 1999.
17. W. Lui, "Retinal implant: Bridging engineering and medicine," in Proc. IEEE Int. Electron Devices Meeting, 2002, pp. 492-495.
18. E. Margalit, M. Maia, J. D. Weiland, R. J. Greenberg, G. Y. Fujii, G. Torres, D. V. Piyathaisere, T. M. O'Hearn, W. Liu, G. Lazzi, G. Dagnelie, D. A. Scribner, E. de Juan Jr., and M. S. Humayun, "Retinal prosthesis for the blind," Surv. Ophthalmol., vol. 47, no. 4, pp. 335-356, 2002.
19. P. Limousin, P. Krack, P. Pollack, A. Benazzouz, C. Ardouin, D. Hoffmann, and A. Benabid, "Electrical stimulation of the subthalamic nucleus in advanced Parkinson's disease," New Eng. J. Med., vol. 339, pp. 1105-1111, 1998.
20. J. K. Chapin, K. A. Moxon, R. S. Markowitz, and M. A. Nicolelis, "Real-time control of a robot arm using simultaneously recorded neurons in the motor cortex," Nature Neurosci., vol. 2, pp. 664-670, July 1999.
21. M.D. Serruya, N.G. Hatsopoulos, L. Paninski, M.R. Fellows, and J. P. Donoghue, "Instant neural control of a movement signal," Nature, vol. 416, pp. 141-142, Mar. 2002.
22. D. M. Taylor, S. I. Tillery, and A. B. Schwartz, "Direct cortical control of 3-D neuroprosthetic devices," Science, vol. 296, pp. 1829-1832, June 2002.
23. K. Frank and M. C. Becker, "Microelectrodes for recording and stimulation," in Physical Techniques in Biological Research, W. L. Nastuk, Ed. New York: Academic, 1964, vol. 5.
24. J. R. M. Delgado, "Electrodes for extracellular recording and stimulation," in Physical Techniques in Biological Research, W. L. Nastuk, Ed. New York: Academic, 1964, vol. 5.
25. D. A. Robinson, "'The electrical properties of metal microelectrodes," Proc. IEEE, vol. 56, pp. 1065-1071, June 1968.
26. O. F. Schanne, M. Lavallee, R. Laprade, and S. Gagne, "Electrical properties of glass microeleclrodes," Proc. IEEE, vol. 56, pp. 1072-1082, June 1968.
27. D. J. Edell, "A peripheral nerve information transducer for amputees: Long-term multichannel recordings from rabbit peripheral nerves," IEEE Trans. Biomed. Eng., vol. BME-33, pp. 203-214, Feb. 1986.
28. G. A. May, S. A. Shamma, and R. L. White, "A tantalum-on-sapphire microelectrode array," IEEE Trans. Electron Devices, vol. ED-26, pp. 1932-1939, Dec. 1979.
29. O. J. Prohaska, F. Olcaytug, P. Pfundner, and H. Dragaun, "Thin-film multiple electrode probes: Possibilities and limitations," IEEE Trans. Biomed. Eng., vol. BME-33, pp. 223-229, Feb. 1986.
30. M. Kuperstein and D. A. Whittington, "A practical 24-channel microelectrode for neural recording in-vivo," IEEE Trans. Biomed. Eng., vol. BME-28, pp. 288-293, Mar. 1981.
31. N. A. Blum, B. G. Carkhuff, H. K. Charles, R. L. Edwards, and R. A. Meyer, "Multisite microprobes for neural recordings," IEEE Trans. Biomed. Eng., vol. 38, pp. 68-74, Jan. 1991.
32. R. S. Pickard, P. L. Joseph, A. J. Collins, and R. C. J. Hicks, "Flexible printed-circuit probe for electrophysiology," Med. Biol. Eng. Comput., vol. 17, pp. 261-267, 1979.
33. K. E. Petersen, "Silicon as a mechanical material," Proc. IEEE, vol. 70, pp. 420-457, May 1982.
34. D. J. Edell, private communication.
35. K. Najafi, J. Ji, and K. D. Wise, "Scaling limitations of silicon multichannel recording probes," IEEE Trans. Biomed. Eng., vol. 37, pp. 1-11, Jan. 1990.
36. C. Huang and K. Najafi, "Fabrication of ultrathin p++ silicon microstructures using ion implantation and boron etch-stop," J. Microelectromech. Systems, vol. 10, pp. 532-537, Dec. 2001.
37. K. Najafi and J. F. Hetke, "Strength characterization of silicon microprobes in neurophysiological tissues," IEEE Trans. Biomed. Eng., vol. 37, pp. 474-481, May 1990.
38. D. T. Kewley, M. D. Hills, D. A. Borkholder, I. E. Opris, N. I. Maluf, C. W. Storment, J. M. Bower, and G. T. A. Kovacs, "Plasma-etched neural probes," Sens. Actuators A, vol. 58, pp. 27-35, 1997.
39. T. H. Yoon, E. J. Hwang, D. Y. Shin, S. I. Park, S. J. Oh, S. C. Jung, H. C. Shin, and S. J. Kim, "A micromachined silicon depth probe for multichannel neural recording," IEEE Trans. Biomed. Eng., vol. 47, pp. 1082-1087, Aug. 2000.
40. P. Norlin, M. Kindlundh, A. Mouroux, K. Yoshida, and U. G. Hofmann, "A 32-site neural recording probe fabricated by DRIE of SOI substrates," J. Micromech. Microeng., vol. 12, pp. 414-419, 2002.
41. K. C. Cheung, K. Djupsund, Y. Dan, and L. P. Lee, "Implantable multichannel electrode array based on SOI technology," J. Microelectromech. Systems, vol. 12, pp. 179-184, Apr. 2003.
42. E. M. Maynard, E. Fernandez, and R. A. Normann, "A technique to prevent dural adhesions to chronically implanted microelectrode arrays," J. Neurosci. Methods, vol. 97, pp. 93-101, 2000.
43. E. M. Schmidt, J. S. McIntosh, and M. J. Bak, "Long-term implants of parylene-C coated microelectrodes," Med. Biol. Eng., vol. 26, pp. 96-101, 1988.
44. J. F. Hetke, J. L. Lund, K. Najafi, K. D. Wise, and D. J. Anderson. "Silicon ribbon cables for chronically implantable microelectrode arrays," IEEE Trans. Biomed. Eng., vol. 41, no. 4, pp. 314-321, Apr. 1994.
45. R. J. Vetter, J. C. Williams, J. F. Hetke, and D. R. Kipke, "Long-term recording properties of implantable thin-film silicon microelectrode arrays in auditory cortex," Soc. Neurosci. Abstr., 2002.
46. P. J- Rousche, D. S. Pellinen, D. P. Pivin Jr., J. C. Williams, R. J. Vetter, and D. R. Kirke, "Flexible polyimide-based intracortical electrode arrays with bioactive capability," IEEE Trans. Biomed. Eng., vol. 48, pp. 361-371, Mar. 2001.
47. T. Stieglitz, H. Beutel, and J.-U. Meyer, "A flexible, light-weight multichannel sieve electrode with integrated cables for interfacing regenerating peripheral nerves," Sens. Actuators A, vol. 60, pp. 240-243, 1997.
48. J. F. Hetke, J. C. Williams, D. S. Pellinen, R. J. Vetter, and D. R. Kipke, "3-D silicon probe array with hybrid polymer interconnect for chronic cortical recording," in Proc. IEEE EMBS Special Topic Conf. Neural Engineering, 2003, pp. 181-184.
49. M. Maghribi, J. Hamilton, D. Polla, K. Rose, T. Wilson, and P. Krulevitch, "Stretchable microelectrode array," in Proc. Int. IEEE-EMBS Special Topics Conf. Microtechnologies Medicine and Biology, 2002, pp. 80-83.
50. K. L. Drake, K. D. Wise, J. Farraye, D. J. Anderson, and S. L. BeMent, "Performance of planar muitisite microprobes in recording extracellular single-unit intracortical activity," IEEE Trans. Biomed. Eng., vol. 35, pp. 719-732, Sept. 1988.
51. B. Ziaie, J. Von Arx, and K. Najafi, "A micro-fabricated planar high-current IrOx stimulating microelectrode," in Proc. IEEE Engineering Medicine and Biology (EMBS) Conf., vol. 1, 1996, pp. 270-271.
52. S. J. Tanghe, "Micromachined silicon stimulating probes with CMOS circuitry for use in the central nervous system," Ph.D. dissertation. University of Michigan, Ann Arbor, 1992.
53. L. S. Robblee and T. L. Rose, "Electrochemical guidelines for selection of protocols and electrode materials for neural stimulation," in Neural Prosthesis: Fundamental Studies, W. Agnew and D. B. McCreery, Eds. Englewood Cliffs, NJ: Prentice-Hall. 1990, ch. 2.
54. J. D. Weiland and D. J. Anderson, "Chronic neural stimulalion with thin-film, iridium oxide electrodes," IEEE Trans. Biomed. Eng., vol. 47, pp. 911-918, 2000.
55. D. J. Anderson, K. Najafi, S. J. Tanghe, D. A. Evans, K. L. Levy, J. F. Hetke, X. L. Xue, J. J. Zappia, and K. D. Wise, "Batch-fabricated thin-film electrodes for stimulation of the central auditory system," IEEE Trans. Biomed. Eng., vol. 36, pp. 693-704, July 1989.
56. L. M. Schiavone, W. C. Dautremont-Smith, G. Beni, and J. L. Shay, "Improved electrochromic behavior of reactively sputtered iridium oxide films," J. Electrochem. Soc., vol. 128, no. 6, pp. 1339-1342, 1981.
57. B. Aurian-Blajeni, M. M. Boucher, A. G. Kimball, and L. S. Robblee, "Physiochemical characterization of sputtered iridium oxide," J. Mater. Res., vol. 4, no. 2, pp. 440-446, 1989.
58. R. D. Meyer, S. F. Cogan, T. H. Nguyen, and R. D. Rauh, "Electrodeposited iridium oxide for neural stimulation and recording electrodes," IEEE Trans. Neural Syst. Rehab. Eng., vol. 9, pp. 2-11, Mar. 2001.
59. P. G. Pickup and V. I. Birss, "A model for anodic hydrous oxide growth at iridium," J. Electroanal. Chem., vol. 220, pp. 83-100, 1987.
60. _, "The influence of the aqueous growth medium on the growth rate, composition, and structure of hydrous indium oxide films," J. Electrochem. Soc., vol. 135, no. 1, pp. 126-133, 1988.
61. X. Beebe and T. L. Rose, "Charge injection limits of activated iridium oxide electrodes with 0.2 ms pulses in bicarbonate buffered saline," IEEE Trans. Biomed, Eng., vol. 35, no. 6, pp. 494-495, June 1988.
62. L. S. Robblee, J. L. Lefko, and S. B. Brummer, "Activated In An electrode suitable for reversible charge injection in saline solution," J. Electrochem. Soc., vol. 130, no. 3, pp. 731-733, 1983.
63. C. Kim and K. D. Wise, "A 64-site multishank CMOS low-profile neural stimulating probe," IEEE J. Solid-Stare Circuits, vol. 31, pp. 1230-1238, Sept. 1996.
64. Q. Bai and K. D. Wise, "Single-unit recording with active microelectrode arrays," IEEE Trans. Biomed. Eng., pp. 911-920, Aug. 2001.
65. _, "A high-yield microassembly structure for three-dimensional microelectrode arrays," IEEE Trans. Biomed. Eng., pp. 281-289, Mar. 2000.
66. M. D. Gingerich, J. F. Hetke, D. J. Anderson, and K. D. Wise, "A 256-site 3D CMOS microelectrode array for multipoint stimulation and recording in the central nervous system," presented at the Int. Conf. Solid-State Sensors and Actuators, Munich, Germany, 2001.
67. K. E. Jones, P. K. Campbell, and R. A. Normann, "A glass/silicon composite intracortical electrode array," Ann. Biomed. Eng., vol. 20, pp. 423-37, 1992.
68. R. A. Normann. "Microfabricated electrode arrays for restoring lost sensory and motor functions," in Dig. IEEE Int. Conf. Solid-State Sensors, Actuators, and Microsystems, 2003, pp. 959-962.
69. J. K. Chen, K. D. Wise, J. F. Hetke, and S. C. Bledsoe Jr., "A multichannel neural probe for selective chemical delivery at the cellular level," IEEE Trans. Biomed. Eng., pp. 760-769, Aug. 1997.
70. D. Papageorgiou, S. C. Bledsoe, M. Gulari, J. F. Hetke, D. J. Anderson, and K. D. Wise, "A shuttered probe with in-line flowmeters for chronic in-vivo drug delivery," in Proc. IEEE MEMS Conf., 2001, pp. 212-215.
71. D. Papageorgiou, S. Bledsoe, K. D. Wise, and D. J. Anderson, "A process-compatible passive shutter for buried-channel chemical delivery probes," in Proc. Int. Conf. Engineering Medicine and Biology, 1999, p. 835.
72. R. Rathnasingham, S. C. Bledsoe, J. D. McLaren, and D. R. Kipke, Characterization of implantable microfabricated fluid delivery devices, in IEEE Trans. Biomed. Eng., 2003. In press.
73. W. H. Ko and T. M. Spears, "Packaging materials and techniques for implantable instruments," Eng. Med. Biol., vol. 2, pp. 24-38, Mar. 1983.
74. K. Najafi, "Micropackaging technologies for integrated microsystems: Applications to MEMS and MOEMS," presented at the SPIE Micromachining and Microfabrication Symp., San Jose, CA. 2003.
75. B. Ziaie, J. Von Arx, M. Dokmenci, and K. Najafi, "A hermetic glass-silicon micropackage with high-density on-chip feedthroughs for sensors and actuators," J. Micromech. Systems, vol. 5, pp. 166-179, 1996.
76. T. J. Harpster and K. Najafi, "Long-term testing of hermetic anodically bonded glass-silicon packages," in Tech. Dig. IEEE 2002 Int. Conf. Micro Electro Mechanical Systems (MEMS 2002), pp. 423-426.
77. B. H. Stark and K. Najafi, "An ultra-thin hermetic package utilizing electroplated gold," in Dig. 11th IEEE Int. Conf. Solid-State Sensors and Actuators (Transducers'01), 2001, pp. 194-197.
78. D. J. Edell, V. V. Toi, V. M. McNeil. and L. D. Clark, "Factors influencing the biocompatibilily of insertable silicon microshafts in cerebral cortex," IEEE Trans. Biomed. Eng., vol. 39, pp. 635-43, June 1992.
79. D. R. Kipke, D. S. Pellinen, and P. J. Rousche, "CNS recording electrodes and techniques," in Neuroprosthetics: Theory and Practice, K. Horch and G. S. Dhillon, Eds. London, U.K.: Imperial College Press, 2003.
80. V. Braitenberg and A. Schuz, Cortex: Statistics and Geometry of Neuronal Connectivity. New York: Springer-Verlag, 1998.
81. D. R. Humphrey and W.S. Come, "Properties of the pyramidal tract neuron system within a functionally defined subregion of primate motor cortex," J. Neurophysiol., vol. 41, pp. 216-243, 1978.
82. D. R. Humphrey and E. M. Schmidt. "Extracellular single-unit recording methods," in Neurophysiological Techniques: Applications to Neural Systems, A. A. Boulton, Ed. Tolowa, NJ: Humana, 1990.
83. J. N. Turner, W. Shain, D. H. Szarowski, M. Andersen, S. Martins, M. Isaacson, and H. Craighead, "Cerebral astrocyte response to micromachined silicon implants," Exp. Neural., vol. 156, pp. 33-49, 1999.
84. W. Shain, L. Spataro, J. Dilgen, K. Haverstick, S. Retterer, M. Isaacson, M. Saltzman, and J. N. Turner, "Controlling cellular reactive responses around neural prosthetic devices using peripheral and local intervention strategies," IEEE Trans. Neural Syst. Rehab. Eng., 2003, to be published.
85. J. W. Fawcett and R. A. Asher, "The glial scar and central nervous system repair," Brain Res. Bull., vol. 49, pp. 377-391, 1999.
86. J. D. Kralik, D. F. Dimitrov, D. J. Krupa, D. B. Katz, D. Cohen, and M. A. Nicolelis, "Techniques for long-term multisite neuronal ensemble recordings in behaving animals," Methods, vol. 25, pp. 121-150, 2001.
87. X. Cui, V. A. Lee, Y. Raphael, J. A. Wiler, J. F. Hetke, D. J. Anderson, and D. C. Martin, "Surface modification of neural recording electrodes with conducting polymer/biomolecule blends," J. Biomed. Mater. Res., vol. 56, no. 2, pp. 261-72, 2001.
88. A. Branner and R. A. Normann. "A multielectrode array for intrafascicular recording and stimulation in sciatic nerve of cats," Brain Res. Bull., vol. 51, pp. 293-306, 2000.
89. P. K. Campbell, R. A. Normann, K. W. Horch, and S. S. Stensaas, "A chronic inuacortical electrode array: Preliminary results," J. Biomed. Mater. Res., vol. 23, pp. 245-59, 1989.
90. E. M. Maynard, C. T. Nordhausen, and R. A. Normann, "The Utah intracortical electrode array: A recording structure for potential brain-computer interfaces," Electroencephal. Clin. Neurophysiol., vol. 102, pp. 228-239, 1997.
91. C. T. Nordhausen, E. M. Maynard, and R. A. Normann, "Single-unit recording capabilities of a 100 microelectrode array," Brain Res., vol. 726, pp. 129-140, 1996.
92. R. A. Normann, D. J. Warren, J. Ammermuller, E. Fernandez, and S. Guillory, "High-resolution spatio-temporal mapping of visual pathways using multi-electrode arrays," Vision Res., vol. 41, pp. 1261-1275, 2001.
93. P. J. Rousche and R. A. Normann, "Chronic recording capability of the Utah intracortical electrode array in cat sensory cortex," J. Neurosc. Methods, vol. 82, pp. 1-15, 1998.
94. J. Csicsvari, B. Jamieson, K. D. Wise, and G. Buzsaki, "Mechanisms of gamma oscillations in the hippocampus of the behaving rat," Neuron, vol. 37, pp. 311-322, Jan. 2003.
95. J. Csicsvari, D. A. Henze, B. Jamieson, K. D. Harris, A. Sirota, P. Barthó, K. D. Wise, and G. Buzsáki, "Massively parallel recording of unit and local field potentials with silicon-based electrodes," J. Neurophysiol., vol. 90, pp. 1314-1323, June 2003.
96. J. G. Arenberg, S. Furakawa, and J. C. Middlebrooks, "Auditory cortical images of tones and noise bands," JARO, vol. 1, pp. 183-194, 2000.
97. J. Perez-Orive, O. Mazor, G. C. Turner, S. Cassenaer, R. I. Wilson, and G. Laurent, "Oscillations and sparsening of odor representations in the mushroom body," Science, vol. 297, pp. 359-365, 2002.
98. Y.-X. Fu, K. Djupsund, H. Gao, B. Hayden, K. Shen, and Y. Dan, "Temporal specificity in the cortical plasticity of visual space representation," Science, vol. 296, pp. 1999-2003, 2002.
99. H. A. Swadlow, A. G. Gusev, and T. Bezdudnaya, "Activation of a cortical column by a thalamocortical impulse," J. Neurosci., vol. 22, pp. 7766-7773, 2002.
100. S. M. Bierer and D. J. Anderson, "Multi-channel spike detection and sorting using an array processing rechnique," Neurocomputing, vol. 26, pp. 947-956, 1999.
101. D. R. Kipke, R. J. Vetter, J. C. Williams, and J. F. Hetke. "Silicon-substrate intracortical microelectrode arrays for long-term recording of neuronal spike activity in cerebral cortex," IEEE Trans. Neural Syst. Rehab. Eng., 2003, to be published.
102. X. Cui, V. A. Lee, Y. Raphael, J. A. Wiler, J. F. Hetke, D. J. Anderson, and D. C. Martin, "Surface modification of neural recording electrodes with conducting polymer/biomolecule blends," J. Biomed. Mater. Res., vol. 56, no. 2, pp. 261-272, 2001.
103. D. H. Szarowski, M. D. Andersen, S. Retterer, A. J. Spence, M. Isaacson, H. G. Craighead, J. N. Turner, and W. Shain, "Brain responses to micromachined silicon devices," Brain Res., 2003, to be published.
104. R. H. Olsson III, M. N. Gulari, and K. D. Wise, "Silicon neural recording arrays with on-chip electronics for in-vivo data acquisition," in Proc. IEEE-EMBS Int. Conf. Microtechnology Medicine and Biology, 2002, pp. 237-240.
105. _, "A fully-integrated bandpass amplifier for extracellular neural recording," in Proc. 1st IEEE/EMBS Int. Conf. Neural Engineering, 2003, pp. 165-168.
106. Y. Yao, M. N. Gulari, J. F. Hetke, and K. D. Wise, "A self-testing multiplexed CMOS stimulating probe for a 1024-site neural prosthesis," in Proc. IEEE Int. Conf. Solid-State Sensors, Actuators, and Microsystems (Transducers'03), pp. 1213-1216.
107. H. Yu and K. Najafi, "Low-power interface circuits for bio-implantable microsystems," presented at the Int. IEEE Solid-State Circuits Conf. (ISSCC) 2003, San Francisco, CA.
108. M. Ghovanloo, K. D. Wise, and K. Najafi, "Toward a button-sized 1024-site wireless cortical microstimulating array," in Proc. Ist Int. IEEE/EMBS Conf. Neural Engineering, 2003, pp. 138-141.
109. M. Ghovanloo and K. Najafi, "A fully-digital frequency-shift-keying demodulator chip for wireless biomedical implants," in Proc. IEEE Southwest Symp. Mixed-Signal Design (SSMSD 2003), pp. 223-227.
110. F. C. Flack, E. D. James, and D. M. Schlapp, "Mutual inductance of air-cored coils: Effect on design or radio frequency coupled implants," Med. Biol. Eng., vol. 9, pp. 79-85, 1971.
111. W. H. Ko, S. P. Liang, and C. D. Fung, "Design of radio-frequency powered coils for implant instruments," Med. Biol. Eng. Comp., vol. 15, pp. 634-640, 1977.
112. M. Soma, D. G. Galbraith, and R. L. White, "Radio-frequency coils in implantable devices: Misalignment analysis and design procedure," IEEE Trans. Biomed. Eng., vol. BME-34, pp. 276-282, Apr. 1987.
113. D. G. Galbraith, M. Soma, and R. L. White, "A wide-band efficient inductive transdermal power and data link with coupling insensitive gain," IEEE Trans. Biomed. Eng., vol. BME-34, pp. 265-275, Apr. 1987.
114. W. J. Heetderks, "RF powering of millimeter and submillimeter-sized neural prosthetic implants," IEEE Trans. Biomed. Eng., vol. 35, pp. 323-327, May 1988.
115. M. R. Shah, R. P. Phillips, and R. A. Normann, "A study of printed spiral coils for neuroprosthetic transcranial telemetry applications," IEEE Trans. Biomed. Eng., vol. 45, pp. 867-876, July 1998.
116. C. R. Neagu, H. V. Jansen, A. Smith, J. G. E. Gardeniers, and M. C. Elwanspoek, "Characterization of a planar microcoil for implantable microsystems," Sens. Actuators A, vol. 62, pp. 599-611, 1997.
117. E. S. Hochmair, "System optimization for improved accuracy in transcutaneous signal and power transmission," IEEE Trans. Biomed. Eng., vol. BME-31, no. 2, pp. 177-186, Feb. 1984.
118. C. M. Zierhofer and E. S. Hochmair, "High-efficiency coupling-insensitive transcutaneous power and data transmission via an inductive link," IEEE Trans. Biomed. Eng., vol. 37, no. 7, pp. 716-722, July 1990.
119. _, "Geometric approach for coupling enhancement of magnetically coupled coils," IEEE Trans. Biomed. Eng., vol. 43, no. 7, pp. 708-714, July 1996.
120. _, "The class-E concept for efficient wide-band coupling-insensitive transdermal power and data transfer," in Proc. IEEE 14th EMBS Conf., vol. 2, 1992, pp. 382-383.
121. H. McDermott, "An advanced multiple channel cochlear implant," IEEE Trans. Biomed. Eng., vol. 36, no. 7, pp. 789-797, July 1989.
122. _, "A custom-designed receiver-stimulator chip for an advanced multiple-channel hearing prosthesis," IEEE J. Solid-State Circuits, vol. 26, pp. 1161-1164, Aug. 1991.
123. B. Smith, P. H. Peckham, M. W. Keith, and D. D. Roscoe, "An externally powered, multichannel, implantable stimulator for versatile control of paralyzed muscle," IEEE Trans. Biomed. Eng., vol. BME-34, no. 7, pp. 499-508, July 1987.
124. T. Akin, K. Najafi, and R. M. Bradley, "A wireless implantable multichannel digital neural recording system for a micromachined sieve electrode," IEEE J. Solid-State Circuits, pp. 109-118, Jan. 1998.
125. P. Mohseni and K. Najafi, "A wireless FM microsystem for biomedical neural recording applications," in Proc. IEEE Southwest Symp. Mixed-Signal Design, 2003, pp. 217-222.
126. Z. Tang, B. Smith, J. H. Schild, and P. H. Peckham, "Data transmission from an implantable biotelemeter by load-shift keying using circuit configuration modulator," IEEE Trans. Biomed. Eng., vol. 42, pp. 524-528, May 1995.
127. M. Ghovanloo, K. Beach, K. D. Wise, and K. Najafi, "A BiCMOS wireless interface chip for micromachined stimulating microprobes," Proc. IEEE-EMBS Special Topic Conf. Microtechnologies Medicine and Biology, pp. 277-282, 2002.