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Proceedings Paper

Remote power delivery for hybrid integrated bio-implantable electrical stimulation system
Author(s): Venkat R. Gaddam; Jagadish Yernagula; Raghavendra R. Anantha; Satish Kona; Sunitha Kopparthi; A. Chamakura; Pratul K. Ajmera; Ashok Srivastava
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Paper Abstract

In this work, a remote power delivery system to charge rechargeable batteries that power a Bio-implanted Electrical Stimulation System (BESS) is first described. A loosely coupled inductive transmitter and receiver system has been used to power a bio-implanted gastric pacer. The receiver coil, rechargeable batteries, battery charging chip and the chip containing stimulation circuitry form a hybrid integrated microsystem. A design methodology for this Remote Power Delivery System (RPDS) is proposed. The BESS chip is also designed for electrical stimulation. It is a special IC chip which takes power from the rechargeable batteries and provides output pulses of 9.9 V amplitude at a frequency of 103 Hz and a duty cycle of 5%. The BESS chip contains a battery switching circuit and a pulse conditioning circuit which first provides pulses of 3 V amplitude. It also has an internal charge pump and a pulse booster circuit to boost the pulse amplitude to 9.9 V. Hybrid packaging is considered for integrating the implantable electrical stimulation circuitry and the remote power delivery system. Screen printed interconnects are used to integrate the BESS chip, the battery charging chip, discrete components and the receiver circuit of the RPDS.

Paper Details

Date Published: 16 May 2005
PDF: 12 pages
Proc. SPIE 5763, Smart Structures and Materials 2005: Smart Electronics, MEMS, BioMEMS, and Nanotechnology, (16 May 2005); doi: 10.1117/12.600621
Show Author Affiliations
Venkat R. Gaddam, Louisiana State Univ. (United States)
Jagadish Yernagula, Louisiana State Univ. (United States)
Raghavendra R. Anantha, Louisiana State Univ. (United States)
Satish Kona, Louisiana State Univ. (United States)
Sunitha Kopparthi, Louisiana State Univ. (United States)
A. Chamakura, Louisiana State Univ. (United States)
Pratul K. Ajmera, Louisiana State Univ. (United States)
Ashok Srivastava, Louisiana State Univ. (United States)

Published in SPIE Proceedings Vol. 5763:
Smart Structures and Materials 2005: Smart Electronics, MEMS, BioMEMS, and Nanotechnology
Vijay K. Varadan, Editor(s)

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