发明名称 |
REDUCED POWER CONSUMPTION LOW BATTERY ALERT DEVICE |
摘要 |
<p>A reduced power consumption low battery indicator comprising in the preferred embodiment a transducer driver which drives a transducer to provide an audible alert. A microprocessor is used to generate a squarewave signal to power the transducer driver whenever the battery is depleted to a first predetermined level. A first low battery sensor is used to determine when the battery is depleted to the first predetermined level and generates a signal which is directed to the microprocessor to commence generation of the signal to drive the transducer driver. A second low battery sensor is used to determine when the battery is depleted to a second predetermined level and generates an output signal which is directed to the transducer driver which then drives the transducer at a lower power consumption rate.</p> |
申请公布号 |
CA1224526(A) |
申请公布日期 |
1987.07.21 |
申请号 |
CA19850488980 |
申请日期 |
1985.08.19 |
申请人 |
MOTOROLA, INC. |
发明人 |
DAVIS, WALTER L. |
分类号 |
H04Q7/14;G01R31/36;G08B21/00;G08B21/20;(IPC1-7):G01R31/36 |
主分类号 |
H04Q7/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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