Architectures for sharing of current sources in an implantable medical device
AssigneeBoston Scientific Neuromodulation Corporation
InventorDongchul Lee
Life of this patent
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Abstract
A group select matrix is added to an implantable stimulator device to allow current sources to be dedicated to particular groups of electrodes at a given time. The group select matrix can time multiplex the current sources to the different groups of electrodes to allow therapy pulses to be delivered at the various groups of electrodes in an interleaved fashion. Each of the groups of electrodes may be confined to a particular electrode array implantable at a particular non-overlapping location in a patient's body. A switch matrix can be used in conjunction with the group select matrix to provide further flexibility to couple the current sources to any of the electrodes.
Claims10
An implantable stimulator device, comprising:
- a plurality of electrodes configured to provide a stimulation current to a patient, wherein the plurality of electrodes are divided into a plurality of groups;
- P current sources, wherein P comprises a plural number;
- logic circuitry;
- a switch matrix having N switch matrix outputs, wherein N comprises a plural number, wherein the switch matrix is controllable by a plurality of first control signals, wherein the logic circuitry is configured to assert at least two of the first control signals, wherein each of the at least two first control signals is configured to couple a different one of the P current sources to a different one of the N switch matrix outputs;
- and
- a group selection matrix configured to receive the N switch matrix outputs and controllable by X group control signal lines, wherein X comprises a plural number,
- wherein the logic circuitry in response to at least one stimulation program is configured to assert at least one of the X group control signal lines, wherein the logic circuitry is configured to assert each of the at least one of the X group control signal lines at different times to couple the N switch matrix outputs to a different one of the groups.
Dependencies are inferred from the claim text.