JPS5552985A - Counting device - Google Patents
Counting deviceInfo
- Publication number
- JPS5552985A JPS5552985A JP12586578A JP12586578A JPS5552985A JP S5552985 A JPS5552985 A JP S5552985A JP 12586578 A JP12586578 A JP 12586578A JP 12586578 A JP12586578 A JP 12586578A JP S5552985 A JPS5552985 A JP S5552985A
- Authority
- JP
- Japan
- Prior art keywords
- counter
- alternating current
- commercial alternating
- oscillator
- time
- 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
- Electric Clocks (AREA)
- Measurement Of Predetermined Time Intervals (AREA)
Abstract
PURPOSE: To enable counting time in high accuracy for long time by counting pulses of high frequency produced from an oscillator at every half cycle of commercial alternating current by a timer counter and controlling an oscillator enable by n shift counter.
CONSTITUTION: A commercial alternating current is applied through a full-wave rectifier 2 and a waveform shaper 3 to a flip-flop FF5, which is thereupon set at every half wave of the commercial alternating current to allow a timer oscillator 6 to generate a clock pulse of higher frequency than the commercial alternating current. When this clock is counted by a timer counter 9 to count the time and also by a decimal counter 8 to cause the counted value to become 10, the flip-flop FF5 is reset through a detector 10 by the pulse from the counter 8 to enable the oscillator 6. Accordingly, an error is not accumulated in the counter 9 to count the time in high accuracy for long time in response to the commercial alternating current stable in period for long time.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12586578A JPS5552985A (en) | 1978-10-13 | 1978-10-13 | Counting device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12586578A JPS5552985A (en) | 1978-10-13 | 1978-10-13 | Counting device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5552985A true JPS5552985A (en) | 1980-04-17 |
Family
ID=14920841
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12586578A Pending JPS5552985A (en) | 1978-10-13 | 1978-10-13 | Counting device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5552985A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58135484A (en) * | 1982-02-05 | 1983-08-12 | Seikosha Co Ltd | Ac synchronizing crystal watch |
JPS6022686A (en) * | 1983-07-19 | 1985-02-05 | Nec Corp | Electronic timepiece |
-
1978
- 1978-10-13 JP JP12586578A patent/JPS5552985A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58135484A (en) * | 1982-02-05 | 1983-08-12 | Seikosha Co Ltd | Ac synchronizing crystal watch |
JPH0236914B2 (en) * | 1982-02-05 | 1990-08-21 | Seikosha Kk | |
JPS6022686A (en) * | 1983-07-19 | 1985-02-05 | Nec Corp | Electronic timepiece |
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