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

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/standard of 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.

Dependencies are inferred from the claim text.