Patent ID: 7190745

Claim:
A radio-controlled timepiece comprising: a receiving unit that receives a standard frequency signal representing current date and time, and outputs a received signal corresponding to one code; a sampling unit that samples the received signal at predetermined time intervals, and outputs a plurality of samples each of which is taken from each of the time intervals; a smoothing unit that smoothens the received signal based on the samples; a first determining unit that determines the code based on the smoothened received signal; and a second determining unit that determines the current date and time based on the code, wherein the sampling unit includes a sampler that samples the received signal at the predetermined time intervals, and that issues a command for initiating a count; and a sampling counter that commences a count of a number of samples made by the sampler after the command for initiating a count has been issued by the sampler, and that clears the count when the count reaches a predetermined value, and wherein the smoothing unit smoothens the received signal by determining, for each of a plurality of specific intervals each of which including a plurality of consecutive time intervals, whether a level of the received signal is high or low.