Power control by magnetic field diminishment in inductively powered biomedical implants

Author

Brendler, Christian ; Aryan, Naser Pour ; Rieger, Viola ; Klinger, Sandra ; Rothermel, Albrecht

Author_Institution

Inst. of Microelectron., Univ. of Ulm, Ulm, Germany

fYear

2013

fDate

11-13 Nov. 2013

Firstpage

185

Lastpage

188

Abstract

A power control circuit by magnetic field diminish-ment in inductively powered biomedical implants is presented. Due to large and fast coupling variations in inductively powered retinal implants caused by the eye movements, excessive power has to be controlled. This proposal attenuates the magnetic field in the secondary coil to reduce received power. Coil shorting is realized by applying short enough pulses to enable a parallel ASK data transmission. The system was fabricated and measured using a 350 nm BiCMOS High Voltage technology. Measurement results show a reduction of the thermal power generated by the implant.

Keywords

BiCMOS integrated circuits; eye; magnetic fields; power control; power electronics; prosthetics; BiCMOS high voltage technology; coil shorting; eye movements; inductively powered biomedical implants; inductively powered retinal implants; magnetic field diminishment; parallel ASK data transmission; power control circuit; secondary coil; size 350 nm; Coils; Couplings; Data communication; Data mining; Implants; Power control; Retina;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Circuits Conference (A-SSCC), 2013 IEEE Asian

Conference_Location

Singapore

Print_ISBN

978-1-4799-0277-4

Type

conf

DOI

10.1109/ASSCC.2013.6691013

Filename

6691013