Integrated circuit design for wireless control of biphasic stimulation in bioelectronic implant

A method of providing biphasic stimulation by an implantable biphasic nerve stimulation device including a capacitor, an electrode, and a power supply, the method comprising:

• receiving, by the implantable biphasic nerve stimulation device, power from an external power source;
• electrically coupling, in a first mode of operation, the capacitor to the power supply;
• electrically coupling, in a second mode of operation, the capacitor to the electrode in a first configuration;
• providing, by the capacitor, a first nerve stimulation signal having a first polarity to the electrode in the second mode of operation;
• electrically coupling, in a third mode of operation, the capacitor to the electrode in a second configuration;
• providing, by the capacitor, a second nerve stimulation signal having a second polarity to the electrode in the third mode of operation, the second polarity being opposite the first polarity;
• and
• communicating, by the implantable biphasic nerve stimulation device, an acknowledgement signal to the external power source responsive to receiving the power from the external power source.

A system for providing biphasic stimulation, the system comprising:

• a plurality of uniquely addressable implantable biphasic stimulation devices associated with a host, each implantable biphasic stimulation device of the plurality of implantable biphasic stimulation devices including:
• an electrode;
• an antenna configured to be inductively coupled to a transmitter;
• a capacitor having a first plate and a second plate;
• a power supply configured to be electrically coupled to the capacitor and to the antenna, and configured to charge the capacitor;
• a backscatter load selectively coupled to the antenna via a switching device;
• a plurality of switches electrically coupled to the electrode, the capacitor, and the power supply;
• a controller electrically coupled to, and configured to provide first control signals to, the switching device to selectively couple the backscatter load to the antenna to output, by the antenna, an acknowledgement signal to the transmitter responsive to receiving the power, the controller further being electrically coupled to, and configured to provide control signals to, the plurality of switches to:
• electrically couple, in a first mode of operation, the first plate of the capacitor to the electrode to provide a first nerve stimulation signal having a first polarity;
• and
• electrically couple, in a second mode of operation, the second plate of the capacitor to the electrode to provide a second nerve stimulation signal having a second polarity opposite the first polarity;
• and
• a housing encapsulating the antenna, the capacitor, the power supply, the backscatter load, the switching device, the plurality of switches, and the controller.