Transthoracic protection circuit for implantable medical devices
First Claim
1. An implantable medical device for delivery of electrical stimulation therapy to a patient, comprising:
- a first tissue interface electrode configured for delivery of the therapy to the patient;
a second tissue interface electrode configured for delivery of the therapy to the patient; and
a low power therapy delivery circuit, including;
a first electrode terminal coupled to the first tissue interface electrode;
a second electrode terminal coupled to the second tissue interface electrode;
a transthoracic protection circuit portion having;
a first segment coupled to the first electrode terminal and a second segment coupled to the second electrode terminal;
an unprotected circuit portion of the low power therapy delivery circuit being coupled to the transthoracic protection circuit portion; and
a reference potential corresponding to a ground potential, wherein the first and second segments of the transthoracic protection circuit portion are coupled to the reference potential in a parallel configuration, and wherein a first impedance of the first segment approximates a second impedance of the second segment.
1 Assignment
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Accused Products
Abstract
An implantable medical device includes a low-power circuit, a high-power circuit, and a multi-cell power source. The implantable medical device delivers stimulation therapy to cardiac tissue. The cardioversion energy is delivered across through electrodes that are coupled to terminals of the high-power circuit. A protection circuit for protecting the low-voltage circuit components from high voltage pulses includes a first segment coupled to a first of the electrodes and a second segment coupled to a second of the electrodes, the components of the low-voltage circuit being coupled to the transthoracic protection circuit portion, and a reference potential corresponding to a ground potential, wherein the first and second segments of the transthoracic protection circuit portion are coupled to the reference potential in a parallel configuration.
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Citations
19 Claims
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1. An implantable medical device for delivery of electrical stimulation therapy to a patient, comprising:
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a first tissue interface electrode configured for delivery of the therapy to the patient; a second tissue interface electrode configured for delivery of the therapy to the patient; and a low power therapy delivery circuit, including; a first electrode terminal coupled to the first tissue interface electrode; a second electrode terminal coupled to the second tissue interface electrode; a transthoracic protection circuit portion having; a first segment coupled to the first electrode terminal and a second segment coupled to the second electrode terminal; an unprotected circuit portion of the low power therapy delivery circuit being coupled to the transthoracic protection circuit portion; and a reference potential corresponding to a ground potential, wherein the first and second segments of the transthoracic protection circuit portion are coupled to the reference potential in a parallel configuration, and wherein a first impedance of the first segment approximates a second impedance of the second segment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification