| 摘要 |
An implantable medical device having a dual cell power source powering a hig h- power output circuit and a low-power control circuit. The power source includes a first, high-rate cell and a second, lower-rate cell having a rate capability less than a rate capability of the first, high-rate cell. The fir st and second cells are electrically connected to the output circuit and contro l circuit by circuitry. In one embodiment, the circuitry connects the first an d second cells in parallel to the output circuit and the control circuit, and includes a switching circuit for selectively uncoupling the first, high-rate cell from the control circuit during a transient high power pulse. In anothe r embodiment, the first and second cells are formed within a single case and a re connected in parallel to the output circuit and the control circuit. In another embodiment, the high-rate cell is anode limited, characterized by a rate capability exhibiting minimal dependence on time up to a pre-selected voltage-based ERI at which at least 40 percent of the cathode is consumed.</ SDOAB>
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