Title :
An efficient wireless power link for high voltage retinal implant
Author :
Wu, Lihsien ; Yang, Zhi ; Basham, Eric ; Liu, Wentai
Author_Institution :
Dept. of Electr. Eng., Univ. of California, Santa Cruz, CA
Abstract :
The design and analysis of a power telemetry system with multiple output voltages is presented in this paper. The system includes a Class E power transmitter, cascaded resonant tank, diode rectifiers, reverse data telemetry and regulators. The power loss associated with voltage conversion is minimized by using a proposed cascaded resonant tank. Reverse telemetry senses the power level fluctuation due to the coil movement and reliably provides minimally required power for the implant. The power telemetry system provides 5 voltage levels (tunable up to plusmn 12 Vplusmn2.5 V and ground), each supported by a dedicated integrated regulator except the ground. The maximum deliverable power is in excess of 100 mW when power coils are separated by 1 cm.
Keywords :
biomedical telemetry; coils; eye; prosthetic power supplies; Class E power transmitter; cascaded resonant tank; coil movement; diode rectifier; distance 1 cm; high voltage retinal implant; power coils; power level fluctuation; power loss; power telemetry system; reverse data telemetry; voltage conversion; wireless power link; Coils; Diodes; Implants; Rectifiers; Regulators; Resonance; Retina; Telemetry; Transmitters; Voltage; high voltage; power telemetry; resonant tanks;
Conference_Titel :
Biomedical Circuits and Systems Conference, 2008. BioCAS 2008. IEEE
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-4244-2878-6
Electronic_ISBN :
978-1-4244-2879-3
DOI :
10.1109/BIOCAS.2008.4696884
