Controllers Cost effectiveness 5 Controlled drug delivery 3 Digital controller designs 3 Digital controllers 3 Electric power system control 3 Field programmable gate arrays (FPGA) 3 Field programmables 3 Field-programmable gated array 3 Hexagonal stimulation 3 Implant devices 3 Implants (surgical) 3 Integrated circuit design 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 Controller hardware 2 Controller hardware-in-the-loop simulation 2 DSO 2 DSOs 2 Energy management 2 Energy management systems 2 Equipment testing 2 Global system for mo-bile communication 2