TY - JOUR
T1 - A smart bi-directional telemetry unit for retinal prosthetic device
AU - Bashirullah, Rizwan
AU - Liu, Wentai
AU - Ji, Ying
AU - Kendir, Alper
AU - Sivaprakasam, Mohanasankar
AU - Wang, Guoxing
AU - Pundi, Bharat
PY - 2003
Y1 - 2003
N2 - This paper describes a smart bi-directional telemetry unit for an implantable retinal prosthetic device. The system is designed to deliver 250mW to the intra-ocular unit via an inductive link and provide wireless communication capability. A novel dual frequency carrier approach is used to optimize the power link for maximum transfer efficiency and the forward telemetry for high data rates. The power link uses a smart feedback system via reverse telemetry to compensate for instantaneous changes in power level due to coil misalignment and load variations. The system is optimized to minimize the power losses in the analog front-end of the intra-ocular unit while ensuring proper device operation. Preliminary results are shown in AMI 1.6μm bulk CMOS process for the reverse telemetry and power feedback system.
AB - This paper describes a smart bi-directional telemetry unit for an implantable retinal prosthetic device. The system is designed to deliver 250mW to the intra-ocular unit via an inductive link and provide wireless communication capability. A novel dual frequency carrier approach is used to optimize the power link for maximum transfer efficiency and the forward telemetry for high data rates. The power link uses a smart feedback system via reverse telemetry to compensate for instantaneous changes in power level due to coil misalignment and load variations. The system is optimized to minimize the power losses in the analog front-end of the intra-ocular unit while ensuring proper device operation. Preliminary results are shown in AMI 1.6μm bulk CMOS process for the reverse telemetry and power feedback system.
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M3 - Conference article
AN - SCOPUS:0038420803
SN - 0271-4310
VL - 5
SP - V5-V8
JO - Proceedings - IEEE International Symposium on Circuits and Systems
JF - Proceedings - IEEE International Symposium on Circuits and Systems
T2 - Proceedings of the 2003 IEEE International Symposium on Circuits and Systems
Y2 - 25 May 2003 through 28 May 2003
ER -