Patent ID: 6023446
Filing Date: 2000-02-08
Classification: G04C

Abstract:
An electronic timepiece comprising:a generator for generating a supply voltage of a first predetermined value U.sub.1 ;a barrel with a spring coupled to and driving said generator;a winding mechanism coupled to said barrel for finding the spring;a set of time indicating hands also driven by said barrel, andan electronic circuit which requires for its operation at least a lower limited supply voltage having a second predetermined value U.sub.2,said electronic circuit comprising a timebase and a regulating circuit for regulating the rotational speed of said generator so that said set of hands is driven at the nominal speed indicating the correct time, whereinsaid timepiece further comprises a voltage regulator connected between said generator and said electronic circuit and capable of adjusting its output voltage to said second limited value U.sub.2 or slightly above this value, and whereinthe ratio between the absolute value U.sub.1 of said first predetermined value U.sub.1 and said second predetermined value U2 satisfies the relationship U.sub.1 =k.multidot.U.sub.2, in which k is a factor corresponding at least to the maximum expected variation rate of said absolute value U.sub.1 when said timepiece is worn.