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특허 상세정보

Meter for measuring battery charge delivered in an implantable device

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) A61N-013/78   
미국특허분류(USC) 607/029
출원번호 US-0730262 (1996-10-15)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 79  인용 특허 : 7
초록

An improved apparatus and method are described for providing a measurement of the charge depleted from a battery used in an implantable device such as a cardiac pacemaker. The measurement is provided not by measuring the voltage level or impedance of the battery, but rather by continuously measuring the electrical current drawn from the battery and integrating that measured current over an integration time period. A precision current-sensing resistor provides a sense signal having a voltage that varies according to the magnitude of current being drawn, a...

대표
청구항

[ What is claimed is:] [1.] A battery charge meter for use in monitoring the amount of charge delivered by a battery in an implantable device comprising:a sensor coupled to the battery, for providing a sense signal corresponding to the electrical current being drawn from the battery;a voltage-controlled oscillator circuit that generates a VCO signal having a frequency that corresponds to the sense signal; anda counter that counts the cycles of the VCO signal to produce a measurement of depleted battery charge.

이 특허를 인용한 특허 피인용횟수: 79

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