Timer system for maintaining the accuracy of a real time clock when synchronization source is not available

An electronic timer system comprising:

• a counter-based time generator for continuously generating raw base time, said counter-based time generator being driven by an oscillator;
• a translator for translating between raw base time, denoted tr, and local precise time, denoted tp, of the timer system based on the following relation:
• tp=A·tr+B,
• where A and B are configurable parameter variables;
• a temperature sensor placed in the proximity of the oscillator or a crystal used by the oscillator;
• a look-up control table in memory holding control values representative of the configurable parameter variable A stored in association with corresponding temperature values, said look-up control table being constructed, from pairs of values of temperature and the parameter variable A sampled at suitable intervals, when the timer system is synchronized with a synchronization source;
• wherein said timer system is configured for reading, when no synchronization source is available, a temperature value from said temperature sensor, and extracting, based on said temperature value, a control value from said look-up control table corresponding to a representation of said temperature value, and configuring the parameter variable A based on the extracted control value at suitable intervals.