US Patent 10953225 Non-invasive nerve activator with adaptive circuit

A topical nerve activation patch includes a flexible substrate, a dermis conforming bottom surface of the substrate comprising adhesive and adapted to contact a dermis of a user, a flexible top outer surface of the substrate approximately parallel to the bottom surface, a plurality of electrodes positioned on the patch proximal to the bottom surface and located beneath the top outer surface and coupled to the flexible substrate, a power source, and electronic circuitry that generates an output voltage applied to the electrodes. The electronic circuitry includes a controller, a voltage monitoring circuit coupled to the controller, a current monitoring circuit coupled to the controller, a switch coupled to the controller and a boosted voltage circuit coupled to the switch and the power source.