JPS5660380A - Electronic timepiece - Google Patents

Electronic timepiece

Info

Publication number
JPS5660380A
JPS5660380A JP13551479A JP13551479A JPS5660380A JP S5660380 A JPS5660380 A JP S5660380A JP 13551479 A JP13551479 A JP 13551479A JP 13551479 A JP13551479 A JP 13551479A JP S5660380 A JPS5660380 A JP S5660380A
Authority
JP
Japan
Prior art keywords
circuit
time
time tone
previous notice
notice signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP13551479A
Other languages
Japanese (ja)
Inventor
Nobuo Toyama
Junichi Yoshida
Shozo Yamano
Kenji Kamiya
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Elemex Corp
Ricoh Co Ltd
Original Assignee
Ricoh Elemex Corp
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Elemex Corp, Ricoh Co Ltd filed Critical Ricoh Elemex Corp
Priority to JP13551479A priority Critical patent/JPS5660380A/en
Priority to US06/094,631 priority patent/US4358836A/en
Priority to FR7928488A priority patent/FR2441876A1/en
Priority to DE19792946865 priority patent/DE2946865A1/en
Publication of JPS5660380A publication Critical patent/JPS5660380A/en
Pending legal-status Critical Current

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  • Electromechanical Clocks (AREA)

Abstract

PURPOSE: To discriminate only the time tone signal and so on from other noise to perform tuning without malfunction, by using a switched capacitor filter using the frequency division output and so on as the clock.
CONSTITUTION: The previous notice signal of the time tone signal picked up by microphone 7 is applied through amplifying circuit 8 to switched capacitor filter 9, to which the prescribed frequency division-state output from frequency dividing circuit 3 of time counting circuit 1 is applied as a clock to switch the switch, consisting of the MOS transistor, the capacitor, the operational amplifter, and so on. The time tone previous notice signal passes through filter 9 in distinction from other noise, and the time tone previous notice signal pattern is discriminated by crest discriminating circuit 10 and time tone pattern discriminating circuit 11. On basis of this discrimination, count contents of second counter 4 of circuit 1 is automatically corrected to the correct time through circuit 12 reset to zero for every 30 seconds, thus performing auto-tuning without malfunction.
COPYRIGHT: (C)1981,JPO&Japio
JP13551479A 1978-11-20 1979-10-20 Electronic timepiece Pending JPS5660380A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP13551479A JPS5660380A (en) 1979-10-20 1979-10-20 Electronic timepiece
US06/094,631 US4358836A (en) 1978-11-20 1979-11-15 Electronic watch with an automatic time indication modifier
FR7928488A FR2441876A1 (en) 1978-11-20 1979-11-19 ELECTRONIC WATCH WITH DEVICE FOR AUTOMATIC MODIFICATION OF THE TIME INDICATION
DE19792946865 DE2946865A1 (en) 1978-11-20 1979-11-20 ELECTRONIC CLOCK

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13551479A JPS5660380A (en) 1979-10-20 1979-10-20 Electronic timepiece

Publications (1)

Publication Number Publication Date
JPS5660380A true JPS5660380A (en) 1981-05-25

Family

ID=15153536

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13551479A Pending JPS5660380A (en) 1978-11-20 1979-10-20 Electronic timepiece

Country Status (1)

Country Link
JP (1) JPS5660380A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5855785A (en) * 1981-09-29 1983-04-02 Seiko Epson Corp Time tone detector

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS508568A (en) * 1973-05-18 1975-01-29
JPS5039860A (en) * 1973-07-09 1975-04-12

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS508568A (en) * 1973-05-18 1975-01-29
JPS5039860A (en) * 1973-07-09 1975-04-12

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5855785A (en) * 1981-09-29 1983-04-02 Seiko Epson Corp Time tone detector
JPH0158471B2 (en) * 1981-09-29 1989-12-12 Seiko Epson Corp

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