Title: Radio clock and method of receiving time information
Application Number: 200610160443 Application Date: 2006.11.13
Publication Number: 1983083 Publication Date: 2007.06.20
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G04C11/02;G04G5/00;G04G7/02
Applicant(s) Name: Atmel Germany GmbH Address:
Inventor(s) Name: Haefner Horst
Attorney & Agent: guowei gang
Abstract:
    In the method for obtaining time information from received amplitude modulation symbol signal, demodulating the time symbol signal, digitizing the obtained analog signals recur to comparator, processing the obtained digital signal in order to obtain the time information. It is also prescribed that, a characteristic value of a temporal duration is compared to a signal phase of a certain signal level (Low) of a digital signal with a desired value. A comparator threshold of the comparator is changed as a function of a result of the comparison, so that the temporal duration approximates the signal phase (low) of the digital signal to the desired value. By this method, the system sensitivity can be improved by the receiver for receiving the time symbol signal according to the present invention. Especially the error-rate caused by the error of the pulse length can be reduced, the received signal that being interfered can be identified more easily by the prescribed time offset of each other for them. Furthermore, the manufacturing permissible error of different function module of the circuit can be compensated in a simple way according to the additional measures of the present invention.
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