JPS5513861A - Clock circuit - Google Patents
Clock circuitInfo
- Publication number
- JPS5513861A JPS5513861A JP8647478A JP8647478A JPS5513861A JP S5513861 A JPS5513861 A JP S5513861A JP 8647478 A JP8647478 A JP 8647478A JP 8647478 A JP8647478 A JP 8647478A JP S5513861 A JPS5513861 A JP S5513861A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- frequency
- division ratio
- commercial alternating
- clock circuit
- 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)
Abstract
PURPOSE: To control automatically the division ratio of a clock circuit by a simple constitution by controlling the division ratio of a divider by making a comparison between a commercial alternating-current frequency and a reference oscillation frequency.
CONSTITUTION: During the period of the reference clock width of output of oscillation circuit 16, pulses of commercial alternating-current power supply 1 waveform- shaped by waveform-shaping circuit 3 are counted and a commercial alternating- current power frequency is compared with a reference clock frequency; and the division ratio of divider 4 is automatically controlled by the comparison output of circuit 17 so as to obtain a clock circuit of simple constitution requiring no switch.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8647478A JPS5513861A (en) | 1978-07-14 | 1978-07-14 | Clock circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8647478A JPS5513861A (en) | 1978-07-14 | 1978-07-14 | Clock circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5513861A true JPS5513861A (en) | 1980-01-31 |
Family
ID=13887955
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8647478A Pending JPS5513861A (en) | 1978-07-14 | 1978-07-14 | Clock circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5513861A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6065496A (en) * | 1983-09-20 | 1985-04-15 | 株式会社東芝 | Induction heating cooking device |
-
1978
- 1978-07-14 JP JP8647478A patent/JPS5513861A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6065496A (en) * | 1983-09-20 | 1985-04-15 | 株式会社東芝 | Induction heating cooking device |
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