JPS5753684A - Control circuit - Google Patents

Control circuit

Info

Publication number
JPS5753684A
JPS5753684A JP12970680A JP12970680A JPS5753684A JP S5753684 A JPS5753684 A JP S5753684A JP 12970680 A JP12970680 A JP 12970680A JP 12970680 A JP12970680 A JP 12970680A JP S5753684 A JPS5753684 A JP S5753684A
Authority
JP
Japan
Prior art keywords
power source
frequencies
reference signal
synchronizing signal
counting
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.)
Granted
Application number
JP12970680A
Other languages
Japanese (ja)
Other versions
JPH0146838B2 (en
Inventor
Toshio Yoshida
Hideyoshi Kawabata
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 JP12970680A priority Critical patent/JPS5753684A/en
Publication of JPS5753684A publication Critical patent/JPS5753684A/en
Publication of JPH0146838B2 publication Critical patent/JPH0146838B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G7/00—Synchronisation

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Electronic Switches (AREA)

Abstract

PURPOSE:To decide electric power source frequencies and improve the accuracy of time limiting of a delay switching circuit counting commercial power source frequencies by combining a power source synchronizing signal and a reference signal. CONSTITUTION:An electric power source synchronizing signal generating means 1 generates a power source synchronizing signal for power sources of both 50Hz and 60Hz. The output of a reference signal generating means 3 generating a reference signal higher than power source frequencies is applied to a counting means 2 to which ssaid synchronizing signal is applied as a reset signal. Hence, the reference signal included between the power source signals appears in the output of the means 2 synchronously with the power source signals. This output is inputted to a decision means 4, and is compared with the preset storage value of a storage means 5, whereby whether the power source frequency is 50Hz or 60Hz can be decided. In this way, in the circuit of counting commercial power source frequencies and using the same as a reference for time limiting, the time limiting of high accuracy is obtained with both power source frequencies.
JP12970680A 1980-09-17 1980-09-17 Control circuit Granted JPS5753684A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12970680A JPS5753684A (en) 1980-09-17 1980-09-17 Control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12970680A JPS5753684A (en) 1980-09-17 1980-09-17 Control circuit

Publications (2)

Publication Number Publication Date
JPS5753684A true JPS5753684A (en) 1982-03-30
JPH0146838B2 JPH0146838B2 (en) 1989-10-11

Family

ID=15016184

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12970680A Granted JPS5753684A (en) 1980-09-17 1980-09-17 Control circuit

Country Status (1)

Country Link
JP (1) JPS5753684A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0429894U (en) * 1990-06-29 1992-03-10

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53104276A (en) * 1977-02-23 1978-09-11 Sony Corp Electronic watch

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53104276A (en) * 1977-02-23 1978-09-11 Sony Corp Electronic watch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0429894U (en) * 1990-06-29 1992-03-10

Also Published As

Publication number Publication date
JPH0146838B2 (en) 1989-10-11

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