Radio-corrected timepiece

Abstract

A reception means extracts a time code from a radio signal received by an antenna, thereby outputting it to a control means. The control means obtains an information of a present time instant from the time code extracted by the reception means and corrects a present time instant being clocked by its own clock means. A display means displays the present time instant being clocked by the clock means. In a case where there has been judged that the time code is not outputted from the reception means, the control means controls so as to alter a tuning frequency by altering a capacity value of a variable capacity diode.

Description

technical field [0001] The present invention relates to a radio correcting timepiece in which time is corrected based on time information received via radio waves. Background technique [0002] For a long time, radio-corrected timepieces have been developed in which the time is automatically corrected by receiving a radio signal indicating the precise time. [0003] Currently, a long-wave standard wave on which time information is superimposed is transmitted from a radio station provided at a predetermined position in each country (for example, Germany, Japan, the United States, the United Kingdom, etc.). In Japan, the long-wave standard waves of 40kHz and 60kHz pass through similar Figure 4 The time code format of the two signals are amplitude modulated separately, and then they are sent from two transmitting stations. [0004] A radio correction timer that receives such a long-wave standard wave is commercialized, and the time data of the clock circuit is corrected in th...

AI Technical Summary

Problems solved by technology

[0010] In the reception sensitivity adjustment method described above, regarding the method of replacing the capacitance of the capacitor, since the adjustment is performed by combining a plurality of capacitors, the work of assembling the radio correction timer becomes troublesome, so that there is a problem of low work efficiency, which is Since it takes a long time to make the above adjustments

[0011] Also, since the rod antenna is relatively small in size and has

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