IMPLANTABLE MEDICAL DEVICES HAVING MULTI-CELL POWER SOURCES
First Claim
1. An implantable medical device, comprising:
- a first cell;
a second cell;
a low power circuit selectively coupled between the first and second cells, wherein the low power circuit receives a first level of current from the first and second cells;
an isolation circuit coupled to the first cell, the second cell and the low power circuit; and
a high power output circuit directly coupled to the first and second cells in a parallel configuration for delivery of an electrical stimulation therapy, wherein the high power output circuit includes a first cell switch configured to couple the first cell to the high power output circuit for delivery of charge and a second cell switch configured to couple the second cell to the high power output circuit for delivery of charge,wherein the isolation circuit is configured to maintain a current isolation between the first cell and the second cell such that a second level of current is delivered from both the first and second cells to the high power output circuit, andwherein the second level of current is greater than the first level of current.
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Abstract
An implantable medical device includes a low-power circuit and a multi-cell power source. The cells of the power source are coupled in a parallel configuration. The implantable medical device includes both a low power circuit that is selectively coupled between the first and second cells and a high power output circuit that is directly coupled to the first and second cells in a parallel configuration. An isolation circuit is coupled to the first cell, the second cell and the low power circuit to maintain a current isolation between the first cell and the second cell at least during delivery of current having a large magnitude to the high power output circuit.
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Citations
20 Claims
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1. An implantable medical device, comprising:
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a first cell; a second cell; a low power circuit selectively coupled between the first and second cells, wherein the low power circuit receives a first level of current from the first and second cells; an isolation circuit coupled to the first cell, the second cell and the low power circuit; and a high power output circuit directly coupled to the first and second cells in a parallel configuration for delivery of an electrical stimulation therapy, wherein the high power output circuit includes a first cell switch configured to couple the first cell to the high power output circuit for delivery of charge and a second cell switch configured to couple the second cell to the high power output circuit for delivery of charge, wherein the isolation circuit is configured to maintain a current isolation between the first cell and the second cell such that a second level of current is delivered from both the first and second cells to the high power output circuit, and wherein the second level of current is greater than the first level of current. - 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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Specification