Title :
A retina stimulator ASIC with 232 electrodes, custom ESD protection and active charge balancing
Author :
Ortmanns, M. ; Unger, N. ; Rocke, A. ; Gehrke, M. ; Tiedtke, H.J.
Author_Institution :
Sciworx GmbH, Hannover
Abstract :
This paper presents the system and design of a retina stimulator with 232 electrodes in a 0.35mum HVCMOS technology. The requirements are outlined and the system architecture is explained. The stimulator provides more than plusmn15 V output swing, features full custom ESD protection at the electrodes and is fully testable. To prevent electrolysis through dc-currents, a new active charge balancer is implemented. Measurement results confirm the approach
Keywords :
CMOS integrated circuits; application specific integrated circuits; biomedical electrodes; electrostatic discharge; eye; neuromuscular stimulation; 0.35 micron; HVCMOS technology; active charge balancer; active charge balancing; custom ESD protection; electrodes; retina stimulator ASIC; Application specific integrated circuits; Biomedical measurements; Electrochemical processes; Electrodes; Electrostatic discharge; Impedance; Protection; Retina; Testing; Voltage;
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location :
Island of Kos
Print_ISBN :
0-7803-9389-9
DOI :
10.1109/ISCAS.2006.1693342
