Satellite radio-controlled wristwatch

摘要

A reception time period required for time adjustment is reduced in a satellite radio-controlled wristwatch. A satellite radio-controlled wristwatch according to the present invention includes: a satellite radio wave reception unit including an antenna for receiving a satellite radio wave, a high frequency circuit, and a decoder circuit; a clock circuit for holding and counting an internal time; and a controller for controlling a timing of at least a time information acquisition operation of acquiring time information from the satellite radio wave received by the satellite radio wave reception unit, the controller being configured to selectively execute, in the time information acquisition operation, based on error evaluation of the internal time: a shortened time adjustment operation of ending the time information acquisition operation at a stage at which head information representing a head of unit information is received, and adjusting the internal time based on a timing at which the head information is received; and a normal time adjustment operation of receiving the time information, and adjusting the internal time based on the time information.

主权项

1. A satellite radio-controlled wristwatch, comprising:
a satellite radio wave reception unit comprising an antenna for receiving a satellite radio wave, a high frequency circuit, and a decoder circuit; a clock circuit for holding and counting an internal time; and a controller which controls a time information acquisition operation of acquiring time information from the satellite radio wave received by the satellite radio wave reception unit, the controller being configured to selectively execute, in the time information acquisition operation, based on error evaluation of the internal time:
a shortened time adjustment operation of ending the time information acquisition operation at a stage at which head information that is preamble data of a fixed value representing a head of unit information is received, and adjusting the internal time based on a timing at which the head information is received; anda normal time adjustment operation of receiving the time information, and adjusting the internal time based on the time information.