Current output architecture for an implantable stimulator device
First Claim
1. An implantable stimulator device, comprising:
- a plurality of electrode nodes implantable adjacent to tissue to be stimulated;
a plurality of first stages, each first stage comprising;
a first current, anda plurality of first switches controllable to provide the first current to more than one of the plurality of electrode nodes; and
a plurality of second stages, each second stage comprising;
a second current, anda plurality of second switches controllable to provide the second current to more than one of the plurality of electrode nodes.
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Abstract
Disclosed herein are current output architectures for implantable stimulator devices. Current source and sink circuitry is divided into a plurality of stages, each of which is capable via an associated switch bank of sourcing or sinking an amount of current to or from any one of the electrodes of the device. The current source circuitry is distinct from the current sink circuitry, and the two share no common circuit nodes prior to connection to the electrodes. In other words, the current source circuitry and the current sink circuitry do not share a common node other than the electrodes. Each stage is preferably formed of a current mirror for receiving a reference current and outputting a scaled version of current to that stage'"'"'s switch bank. The scalar at each stage can be set by wiring a desired number of output transistors in parallel.
28 Citations
40 Claims
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1. An implantable stimulator device, comprising:
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a plurality of electrode nodes implantable adjacent to tissue to be stimulated; a plurality of first stages, each first stage comprising; a first current, and a plurality of first switches controllable to provide the first current to more than one of the plurality of electrode nodes; and a plurality of second stages, each second stage comprising; a second current, and a plurality of second switches controllable to provide the second current to more than one of the plurality of electrode nodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An implantable stimulator device, comprising:
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a plurality of electrode nodes implantable adjacent to tissue to be stimulated; current source circuitry comprising a plurality of first stages, wherein each first stage is controllable to source a source current to more than one of the plurality of electrode nodes via first output paths; and current sink circuitry comprising a plurality of second stages, wherein each second stage is controllable to sink a sink current from more than one of the plurality of electrode nodes via second output paths, wherein the first and second output paths do not share a common node other than the electrode nodes. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification