JPS5513861A - Clock circuit - Google Patents

Clock circuit

Info

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
Application number
JP8647478A
Other languages
Japanese (ja)
Inventor
Yoshito Tabuchi
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP8647478A priority Critical patent/JPS5513861A/en
Publication of JPS5513861A publication Critical patent/JPS5513861A/en
Pending legal-status Critical Current

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
JP8647478A 1978-07-14 1978-07-14 Clock circuit Pending JPS5513861A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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