Integrated circuit design 9 Field programmable gate arrays (FPGA) 7 Controllers 4 Controlled drug delivery 3 Cost effectiveness 3 Digital controller designs 3 Digital controllers 3 FPGA 3 Field programmable gate array 3 Field programmables 3 Field-programmable gated array 3 Fuzzy logic 3 Hexagonal stimulation 3 Implant devices 3 Implants (surgical) 3 Micro/nano 3 Ophthalmology 3 Retinal implant technology 3 Subretinal implants 3 Wireless telemetry systems 3 digital controller 3 field-programmable gated arrays 3 hexagonal stimulation 3 wireless telemetry system 3 Analog to digital conversion 2 Analog to digital converters 2 CMOS 2 CMOS integrated circuits 2 Channels 2 Computer circuits 2