Horology: time measuring systems or devices – Combined with disparate device
Patent
1996-02-06
1998-04-14
Roskoski, Bernard
Horology: time measuring systems or devices
Combined with disparate device
368 47, 368200, G04B 4500
Patent
active
057401292
ABSTRACT:
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.
REFERENCES:
patent: 4305041 (1981-12-01), Frerking
patent: 5272650 (1993-12-01), Adams et al.
Nokia Mobile Phones Limited
Roskoski Bernard
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