A Two Channels Fully-Programmable Integrated Neurostimulator with a 0.07% Charge Mismatch

Neurostimulation applications require increasing versatility to tailor the treatment to the patient needs, thus improving its efficacy. In this work, we propose a fully-programmable integrated neurostimulation system capable of performing biphasic stimulation with a maximum stimuli current of ±10 mA, a maximum frequency stimulation of 50 kHz and a reduced charge mismatch of only 0.07%. Accurate electrical simulations were performed on a prototype designed with 180 nm standard CMOS process, validating the effectiveness of the proposed circuit. The obtained results are comparable with the state of the art.