发明名称 |
Real time clock |
摘要 |
A real time clock is arranged to generate output signals indicative of time of day. An oscillating device (101) produces a first clocking signal which is adjusted in response to a calibration value to produce an output clocking signal. A processor (102) re-calculates the calibration value in response to external clocking signals received from a cellular base station for mobile telephones. The clock may be provided within a mobile telephone and the oscillating device may also be used to provide sleep clock signals allowing a high frequency system clock to be de-activated for periods while the telephone is in a stand-by condition. |
申请公布号 |
US5740129(A) |
申请公布日期 |
1998.04.14 |
申请号 |
US19960597619 |
申请日期 |
1996.02.06 |
申请人 |
NOKIA MOBILE PHONES LIMITED |
发明人 |
FRAMPTON, SIMON |
分类号 |
G04G99/00;G04F3/00;G04G5/00;G04G7/02;H04B1/16;H04W52/02;(IPC1-7):G04B45/00 |
主分类号 |
G04G99/00 |
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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