Implantable defibrillation output circuit
AssigneeCardiac Pacemakers, Inc.
InventorsKeith R. Maile, William J. Linder
Life of this patent
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Abstract
An implantable defibrillation circuit can include an output circuit. The output circuit can include a first switch configured to controllably connect a first supply node to a first output node, a second switch configured to controllably connect a second supply node to the first output node through a first rectifier, and the second switch can be configured to inhibit the first switch from connecting the first supply node to the first output node when the second supply node is connected to the first output node through the second switch. In an example, the first and second switches can include insulated gate bipolar transistors.
Claims20
An implantable apparatus, comprising:
- an implantable electrostimulation therapy output circuit, including:
- a first defibrillation supply node;
- a first defibrillation output node;
- a second defibrillation supply node;
- a first rectifier;
- a first switch having a control input configured to control a conductive state of the first switch, the first switch coupled to the first defibrillation supply node and the first defibrillation output node, and the first switch configured to controllably connect the first defibrillation supply node to the first defibrillation output node;
- a second switch coupled to the second defibrillation supply node, the control input of the first switch, and the first output node, the second switch configured to controllably connect the second defibrillation supply node to the first defibrillation output node through the first rectifier;
- wherein the second switch is configured to inhibit the first switch from connecting the first defibrillation supply node to the first defibrillation output node when the second defibrillation supply node is connected to the first defibrillation output node through the second switch;
- and
- wherein the first output node is configured to be coupled to a first implantable electrode to provide a defibrillation therapy to a heart.
An implantable apparatus, comprising:
- an implantable electrostimulation therapy output circuit including:
- a first supply node;
- a first output node;
- a second supply node;
- a first rectifier;
- a control circuit;
- a first switch having a control input configured to control a conductive state of the first switch using a voltage, the first switch coupled to the first supply node and the first output node, and the first switch configured to controllably connect the first supply node to the first output node;
- and
- a second switch coupled to the second supply node, the control input of the first switch, and the first output node, the second switch configured to controllably connect a second supply node to the first output node through the first rectifier and configured to controllably connect the second supply node to the control input of the first switch;
- wherein the second switch is configured to inhibit the first switch from connecting the first supply node to the first output node when the second supply node is connected to the first output node through the second switch;
- and
- wherein the first output node is configured to be coupled to a first implantable electrode;
- and
- wherein the control input is coupled to the control circuit using an un-isolated electrical coupling.
Dependencies are inferred from the claim text.