Circuit for an implantable device

摘要

An integrated circuit includes: a radio-frequency (RF) to direct current (DC) rectifying circuit coupled to one or more antenna on an implantable wirelessly powered device, the rectifying circuit configured to: rectify an input RF signal received at the one or more antennas and from an external controller through electric radiative coupling; and extract DC electric power and configuration data from the input RF signal; a logic control circuit connected to the rectifying circuit and a driving circuit, the logic control circuit configured to: generate a current for the driving circuit solely using the extracted DC electrical power; in accordance with the extracted configuration data, set polarity state information for each electrode; and a driving circuit coupled to one or more electrode, the driving circuit comprising current mirrors and being configured to: steer, to each electrode and via the current mirrors, a stimulating current solely from the generated current.

主权项

1. An integrated circuit for an implantable wirelessly powered device for implantation in a patient's body, the circuit comprising:
a radio-frequency (RF) to direct current (DC) rectifying circuit coupled to one or more antenna on the implantable wirelessly powered device, the rectifying circuit configured to:
rectify an input RF signal received non-inductively at the one or more antennas and from an external controller through electric radiative coupling; andextract DC electric power and configuration data from the input RF signal; a logic control circuit connected to the rectifying circuit and a driving circuit that is coupled to two or more electrodes, the logic control circuit configured to:
generate a current for the driving circuit solely using the extracted DC electrical power; andin accordance with the extracted configuration data, set polarity state information for each of the two or more electrodes; and a driving circuit coupled to the two or more electrodes, the driving circuit comprising current mirrors and configured to:
steer, to each of the two or more electrodes and via the current mirrors, a stimulating current solely from the generated current to modulate neural tissue within the patient's body such that the two or more electrodes conduct stimulating currents of substantially identical amplitude when activated to apply stimulation to neural tissue.