Patent ID: 11931592
Assignee: CARDIAC PACEMAKERS, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 6:
7. The implantable medical device of claim 6 wherein the first switch is an IGBT, and the second switch is a latching switch, wherein the output control circuit further comprises first and second paths to ground from the low side legs of the H-bridge, in which the first path to ground comprises a third switch, and the second path to ground is comprises a resistor in series with a fourth switch, the implantable medical device further comprising a controller configured to control the first, second, third and fourth switches as follows:
to deliver higher voltage therapy, the third switch is closed to provide a low impedance path to ground from the H-bridge, and the first switch is used to initiate and terminate therapy delivery;
to deliver lower voltage therapy, to initiate therapy, the third switch is opened and the second and fourth switches are closed, with closing of the fourth switch and opening of the third switch providing a path to ground from the H-bridge through the resistor, and the fourth switch is opened to terminate therapy delivery.