Implantable nerve stimulator having internal electronics without ASIC and methods of use
First Claim
1. A method of controlling circuitry of an implantable neurostimulator to selectively source or sink current to an implantable lead electrically coupled thereto comprising a plurality of electrodes positionable proximate to a target region within a patient'"'"'s body for delivering electrical stimulation to the target region, the method comprising:
- identifying a desired operation of a first differential amplifier, wherein the first differential amplifier is located within a hermetically sealed internal volume of a bio-compatible housing of the implantable neurostimulator, and wherein the first differential amplifier is configured to selectively source current to a lead and to selectively sink current from the lead;
generating a first control signal configured to cause the first differential amplifier to source current to the lead, wherein the first control signal comprises a voltage greater than a voltage of a constant voltage supply, wherein the constant voltage supply is coupled to an inverting input of the first differential amplifier; and
providing the first control signal to a non-inverting input of the first differential amplifier with a first current command.
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Accused Products
Abstract
An implantable pulse generator that includes a current source/sink generator is disclosed herein. The current source/sink generator includes a current drive differential amplifier. The current driver differential amplifier is configured to selectively source current to, or sink current from a target tissue. The current drive differential amplifier includes an inverting input and a non-inverting input. One of the inputs of the current drive differential amplifier is connected to a virtual ground, and the other is connected to a current command. A stimulation controller can supply a voltage to the other of the inputs of the current drive differential amplifier to select either current sourcing or current sinking.
611 Citations
21 Claims
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1. A method of controlling circuitry of an implantable neurostimulator to selectively source or sink current to an implantable lead electrically coupled thereto comprising a plurality of electrodes positionable proximate to a target region within a patient'"'"'s body for delivering electrical stimulation to the target region, the method comprising:
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identifying a desired operation of a first differential amplifier, wherein the first differential amplifier is located within a hermetically sealed internal volume of a bio-compatible housing of the implantable neurostimulator, and wherein the first differential amplifier is configured to selectively source current to a lead and to selectively sink current from the lead; generating a first control signal configured to cause the first differential amplifier to source current to the lead, wherein the first control signal comprises a voltage greater than a voltage of a constant voltage supply, wherein the constant voltage supply is coupled to an inverting input of the first differential amplifier; and providing the first control signal to a non-inverting input of the first differential amplifier with a first current command. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification