Thermocompensated chronometer circuit

An electronic watch comprising:

• at least one electric motor for driving an analog display;
• a clock module including a time base delivering a clock signal connected to a divider circuit, the divider circuit delivering a reference signal sent to a control circuit configured to control the electric motor;
• wherein the clock module further includes a measuring and correction circuit arranged between the time base and the divider circuit and delivering an intermediate compensated signal;
• the time base, the compensation module, the divider circuit, and the control circuit being arranged in a same case to form the clock module, and
• further comprising a chronograph module connected to the clock module, the chronograph module being clocked by the intermediate compensated signal from the clock module.

A method of calibrating at least one clock module including a time base delivering a clock signal connected to a divider circuit, the divider circuit delivering a reference signal sent to a control circuit configured to control the electric motor, wherein the clock module further includes a measuring and correction circuit arranged between the time base and the divider circuit and delivering an intermediate compensated signal, the method comprising:

• assembling the time base, the divider circuit, the control circuit, and the measuring and correction circuit in a case;
• closing the case;
• measuring characteristics of the time base as a function of temperature;
• determining correction parameters;
• and
• storing the correction parameters in the measuring and correction circuit.