Output circuitry for multiple-therapy implantable devices
AssigneeCardiac Pacemakers, Inc.
InventorsBrandon Tyler Keil, William J. Linder, Keith R. Maile
Life of this patent
Estimating the term…
Abstract
Improved devices, circuits and methods of operation in implantable stimulus systems. An implantable defibrillator may comprise an H-bridge output circuit having low and high sides, with a current controlling circuit coupled to the high side of the H-bridge output circuit and a current monitoring circuit coupled to the low side of the H-bridge output circuit. Alternate current paths to the output of the H-bridge, or to the H-Bridge itself, are used for delivering different therapies to the patient.
Claims18
An electronic circuit for generating at least first and second power tiers for electronic output of a medical device, the circuit comprising:
- a high voltage therapy subcircuit configured to generate defibrillation pulses;
- a low voltage therapy subcircuit configured to issue pacing pulses;
- an H-bridge comprising first and second high side legs and first and second low side legs, each leg comprising a switch, the first high side and first low side legs coupled together at a first load node;
- and the second high side and second low side legs coupled together at a second load node;
- an H-bridge enable switch coupled to the first and second high side legs;
- wherein the high voltage therapy subcircuit is coupled to the H-bridge enable switch, and the low voltage therapy subcircuit is coupled to the first and second high side legs, thereby omitting the H-bridge enable circuit from a current path for the low voltage therapy subcircuit.
An electronic circuit for generating at least first and second power tiers for electronic output of a medical device, the circuit comprising:
- a high voltage therapy subcircuit configured to generate defibrillation pulses;
- a low voltage therapy subcircuit configured to generate pacing pulses;
- an H-bridge comprising first and second high side legs and first and second low side legs, each leg comprising a switch, the first high side and first low side legs coupled together at a first load node, and the second high side and second low side legs coupled together at a second load node;
- wherein the high voltage therapy subcircuit is coupled to the first and second high side legs, and the low voltage therapy subcircuit is coupled to the first and second load nodes, thereby omitting the switches of the first and second high side legs of the H-bridge from a current path for the low voltage therapy subcircuit.
Dependencies are inferred from the claim text.