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Current controlled CMOS stimulator with programmable pulse pattern for a retina implant

: Raffelberg, Pascal; Burkard, Roman; Viga, Reinhard; Mokwa, Wilfried; Walter, Peter; Grabmaier, Anton; Kokozinski, Rainer


Institute of Electrical and Electronics Engineers -IEEE-:
14th Conference on Ph.D. Research in Microelectronics and Electronics, PRIME 2018 : July 2nd - July 5th, 2018, Prague, Czech Republic
Piscataway, NJ: IEEE, 2018
ISBN: 978-1-5386-5387-6
ISBN: 978-1-5386-5386-9
ISBN: 978-1-5386-5388-3
Conference on Ph.D. Research in Microelectronics and Electronics (PRIME) <14, 2018, Prague>
Deutsche Forschungsgemeinschaft DFG
Entwicklung einer implantierbaren epiretinalen Sehprothese mit integrierter Bildaufnahme
Conference Paper
Fraunhofer IMS ()
transistor; electrode; mirror; layout; integrated circuit; high-voltage technique; signal generator

In this work the constant current stimulator of a new epiretinal implant is presented. It consists of a digital waveform generator device, which permits to modify the pulse pattern via a programming interface, a digital–to–current converter, which translates the digital waveform into current pulses with adjustable amplitude, and an output driver, which combines the function of an electrode multiplexer and a high voltage current source for driving large resistive loads. For each of those subcircuits the simulated performance and its designed layout is presented.