Invention Grant
- Patent Title: Time information receiver and radio controlled watch
- Patent Title (中): 时间信息接收器和无线电控制手表
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Application No.: US12077860Application Date: 2008-03-21
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Publication No.: US08089918B2Publication Date: 2012-01-03
- Inventor: Kaoru Someya
- Applicant: Kaoru Someya
- Applicant Address: JP Tokyo
- Assignee: Casio Computer Co., Ltd.
- Current Assignee: Casio Computer Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Holtz, Holtz, Goodman & Chick, PC
- Priority: JP2007-079830 20070326
- Main IPC: H04J3/08
- IPC: H04J3/08

Abstract:
A standard time and frequency signal receiver receives a time code in which a plurality of data pulses “1”, “0” and “P” which are identified by width are arranged one in a respective one of unit periods of the standard signal. An amplitude of a detected signal of the time code is sampled with respect to a seconds synchronization point in a unit period. Then, correlation values F1, F0 and FP for the data pulses “P”, “1” and “0”, respectively, are calculated based on the sampled values. These correlation values F1, F0 and FP are then compared to determine the data pulse received. Even when the time code contains a considerable noise, which of the “1”, “0” and “P” signals was received is determined accurately, thereby achieving the reception of the time code with a reduced error.
Public/Granted literature
- US20080240076A1 Time information receiver and radio controlled watch Public/Granted day:2008-10-02
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