An implantable neural interface micro-stimulator chip with external controllability

Various implantable micro-stimulators have been proposed for clinical applications in recent years. A small and flexible implanted device is the key component to any field application. This multiparameter implantable SOC (system-on-chip) chip design is aimed at neural interface stimulation, which includes controllable stimulators, and telemetry for data and power transmission. The micro-stimulator consists of 2-channel addressable current-source stimulators with seven parameters can be controlled by the external device. The external transmitter employs the RS232 format as the data transmission protocol and utilizes the NRZ code to transmit instructions and data to the implanted SOC chip. The entire SOC circuit is implemented on silicon by 0.35 μm CMOS 2P4M technology.