JPS5660380A - Electronic timepiece - Google Patents
Electronic timepieceInfo
- 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
Links
Landscapes
- 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
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5855785A (en) * | 1981-09-29 | 1983-04-02 | Seiko Epson Corp | Time tone detector |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS508568A (en) * | 1973-05-18 | 1975-01-29 | ||
JPS5039860A (en) * | 1973-07-09 | 1975-04-12 |
-
1979
- 1979-10-20 JP JP13551479A patent/JPS5660380A/en active Pending
Patent Citations (2)
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)
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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