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|국가/구분||United States(US) Patent 등록|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 54 인용 특허 : 0|
A pacemaker is provided having an improved circuit for obtaining a measure of battery end-of-life. The EOL detector includes an input stage with a current mirror output providing a current which is proportional to the current being consumed by the pacemaker circuitry, and thus being expended by the battery. The proportional current is directed to charge a capacitor, which is periodically discharged at a constant current, following which the battery goes through repeated cycles of charging and discharging. A measuring circuit measures the time of capacito...
A pacemaker having a battery, pacemaker circuitry for carrying out pacing functions, and an energy consumption detector, said detector comprising (a) accumulating means for accumulating a signal representative of the integral of pacemaker circuitry current over the time since it last started to accumulate said signal; (b) readout means for reading out said accumulated signal when it reaches a predetermined threshold and for developing therefrom a measure of battery expenditure over said time; (c) said readout means having means for zeroing out said accum...