WIRELESS SIGNAL CONTROL TYPE DIGITAL CLOCK

PURPOSE: To reduce cost and improve accuracy by decoding the digit of time information for verification by collecting and storing wireless signal data when a decodable radio signal is found and then a transmission boundary can be checked. CONSTITUTION: An RF(Radio Frequency) signal 12 responds to a...

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Bibliographische Detailangaben
Hauptverfasser: CHII UEN WAN, DEIBUITSUDO SHIYAKUTAA, POORU ERU UIRIAMUSU, FUIRITSUPU EMU SUPAIRA, CHIYAARUZU SHII KONKURIN, MAIKERU DABURIYUU FUEIBAA
Format: Patent
Sprache:eng
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Zusammenfassung:PURPOSE: To reduce cost and improve accuracy by decoding the digit of time information for verification by collecting and storing wireless signal data when a decodable radio signal is found and then a transmission boundary can be checked. CONSTITUTION: An RF(Radio Frequency) signal 12 responds to a frequency band selection signal that is sent from a microprocessor (CPU) 26 via a line 22 via an RF tuner 14 and a level translator 24. Also, the output of the tuner 14 is guided to a double conversion IF strip 40, the output of a strip 40 is inputted to an attenuator 54, and an audible signal level is decreased. The output of the attenuator 54 is added to an audible band filter via an audible signal envelope detector 56 and an AGC amplifier 58. A control input to an audible band filter 60 can be obtained from the output of a clock generator 62 to be controlled 26. A threshold detector 64 forms a rectangular wave signal for detecting the presence of frequency being selected by a filter 60. A digit to be displayed is transmitted to a display 20 via a data bus 70 and an interface 76.