Patent ID: 6650942
Filing Date: 2003-11-18
Classification: A61N

Abstract:
An implantable medical device comprising:a hermetic enclosure; a low-power control circuit located in the enclosure; a high-power output circuit located in the enclosure for delivering an electrical pulse therapy; and a power source and circuitry located in the enclosure for powering the low-power control circuit and the high-power output circuit, the power source and circuitry comprising: a first, high-rate cell, a second, lower-rate cell having a rate capability less than a rate capability of the first, high-rate cell, wherein the first cell and second cell are electrically connected in parallel to the low-power control circuit and the high-power output circuit, a switching circuit electrically connected between the first, high-rate cell and the low-power control circuit for selectively uncoupling the first, high-rate cell from the low-power control circuit upon activation of the high-power output circuit.