Patent ID: 8660660

Claim:
A power control system for an implant on a human or animal body, comprising: a charging circuit to provide power to deliver controlled stimulation currents to a tissue of the human or animal body; a capacitive storage arrangement connected with the charging circuit and charged by the charging circuit; a voltage limiting shunting arrangement, including a current mirror and a tap out and providing a shunt current, connected with the capacitive storage arrangement, to limit voltage on the capacitive storage arrangement; a capacitive storage arrangement monitoring circuit connected with the capacitive storage arrangement and the shunting arrangement to monitor charging and draining conditions of the capacitive storage arrangement; a back telemetry controller connected with the capacitive storage arrangement monitoring circuit to receive charging and draining data from the capacitive storage arrangement monitoring circuit and to transmit the charging and draining data outside the power control system; a charge control circuit receiving the charging and draining data to stop stimulating when adequate voltage cannot be maintained on the capacitive storage arrangement; a driver array configured to transfer charges from the capacitive storage arrangement to the tissue; and an electrode array connected with the driver array and adapted to connect to the tissue.