Method of correcting a real-time clock of an electronic...

Details Method of correcting a real-time clock of an electronic... Method of correcting a real-time clock of an electronic...

2006-10-10

2006-10-10

Miska, Vit W. (Department: 2841)

Horology: time measuring systems or devices

Regulating means

For adjusting the frequency or beat

C368S202000, C324S076480

Reexamination Certificate

active

07118269

ABSTRACT:
A method of correcting a real-time clock of an electronic apparatus, notably a mobile telephone, in which the real-time clock operates with a first clock generator which generates a real-time clock while the electronic apparatus operates with a second clock generator which generates a system clock, which method includes the following steps:determining the actual frequency of the real-time clock,determining the ratio Vclock/standardof the actual frequency of the real-time clock to the reference frequency of a standard clock,determining the deviation time of the real-time clock per second from the difference (1−Vclock/standard),determining, on the basis of the deviation time per second, a time difference dt within which the real-time clock is to be corrected by a correction time difference Δt,correcting the real time by Δt after expiration of dt.

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