Apparatus with intermittent enabling means for detecting end of battery life
First Claim
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1. An apparatus for detecting end of battery life which is used in a system powered by a battery, comprising:
- electromotive force comparing means connected to be supplied with power from said battery for comparing the electromotive force of said battery with a predetermined value;
a processing device including a memory for storing an application program for execution by said processing device, said application program intermittently enabling said electromotive force comparing means to compare said battery electromotive force with said predetermined value.
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Abstract
An apparatus used in a system powered by a battery for detecting end of battery life. The apparatus includes an electromotive force comparing circuit getting power supply from a battery for comparing electromotive force of the battery with a predetermined value, and an intermittently enabling circuit for intermittently enabling the electromotive force comparing circuit. The electromotive force comparing circuit receives, only when it is enabled by the intermittently enabling circuit, power from the battery to operate. When not enabled, the electromotive force comparing circuit does not consume any power from the battery.
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Citations
12 Claims
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1. An apparatus for detecting end of battery life which is used in a system powered by a battery, comprising:
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electromotive force comparing means connected to be supplied with power from said battery for comparing the electromotive force of said battery with a predetermined value; a processing device including a memory for storing an application program for execution by said processing device, said application program intermittently enabling said electromotive force comparing means to compare said battery electromotive force with said predetermined value. - View Dependent Claims (2, 3)
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4. An apparatus for detecting end of battery life which is used in a system powered by a battery, comprising:
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electromotive force comparing means connected to obtain power from said battery for comparing the electromotive force of said battery with a predetermined value; intermittent enabling means for intermittently generating an enabling signal enabling said electromotive force comparing means; and said intermittent enabling means comprises an enabling signal generating means which generates said enabling signal for intermittently enabling said electromotive force comparing means at time intervals determined as a function of the electromotive force level of said battery. - View Dependent Claims (5, 6, 7, 8)
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9. An apparatus for detecting end of battery life which is used in a system powered by a battery, comprising:
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electromotive force comparing means connected to obtain power from said battery for comparing the electromotive force of said battery with a predetermined value; intermittent enabling means for intermittently generating an enabling signal enabling said electromotive force comparing means; and said intermittent enabling means comprises; time measuring means for measuring an elapsed time from a predetermined time; time comparing means for comparing the elapsed time measured by said time measuring means with a predetermined reference time; and means for generating said enabling signal at intervals of a predetermined first time before said reference time passes, and at intervals of a predetermined second time shorter than said first time after said reference time has passed. - View Dependent Claims (10, 11, 12)
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Specification