Gian Luca Barbruni, P. Ros, D. Demarchi, S. Carrara, D. Ghezzi
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Ultra-Miniaturised CMOS Current Driver for Wireless Biphasic Intracortical Microstimulation
This work shows an ultra-miniaturised and ultralow-power CMOS current driver for biphasic intracortical microstimulation. The CMOS driver is composed of a leakage-based voltage-to-current converter and an H-bridge circuit providing biphasic charge-balanced current stimulation. The circuit has been simulated, fabricated and tested. The current driver consumes 1.87 µW with a supply voltage of 1.8 V, and it occupies a silicon area of 15×12.4 µm2. The driver works in linearity in the current range between 23−92 µA.
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