JPS55128188A - Electronic watch - Google Patents

Electronic watch

Info

Publication number
JPS55128188A
JPS55128188A JP3549879A JP3549879A JPS55128188A JP S55128188 A JPS55128188 A JP S55128188A JP 3549879 A JP3549879 A JP 3549879A JP 3549879 A JP3549879 A JP 3549879A JP S55128188 A JPS55128188 A JP S55128188A
Authority
JP
Japan
Prior art keywords
sec
interval
output
pulse
oscillator
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
JP3549879A
Other languages
Japanese (ja)
Inventor
Junichi Yoshida
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.)
Ricoh Elemex Corp
Ricoh Co Ltd
Original Assignee
Ricoh Elemex Corp
Ricoh 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 Ricoh Elemex Corp, Ricoh Co Ltd filed Critical Ricoh Elemex Corp
Priority to JP3549879A priority Critical patent/JPS55128188A/en
Publication of JPS55128188A publication Critical patent/JPS55128188A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To accomplish a higher stabilization and accuracy of the watch with a higher accuracy of the trimming by a digital trimming of the signal obtained from the division of the frequency generated with the standard oscillator at the interval of N sec.
CONSTITUTION: Fed to the waveform shaping circuit 3, the output of the standard oscillator 1 is divided in n/2 and fed to a time counter 5 through an OR gate OR 1 as a one-sec. cycle pulse. At the same time, the contents preset at a down counter 2 corresponding to each output of the oscillator 1 is subtrated and the FF 1 is set when the counting reaches n and it is reset by the Q output. Thus, a masking is applied to the feed of the sec. pulse at the interval of N-1 sec. so that the sec. pulse is fed at the interval of N sec. to the OR gate 1 from the pulse shaping circuit 4. In this manner, according to the contents preset for the counter 2, the output of the oscillator 1 undergoes a digital trimming at the interval of N sec.
COPYRIGHT: (C)1980,JPO&Japio
JP3549879A 1979-03-28 1979-03-28 Electronic watch Pending JPS55128188A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3549879A JPS55128188A (en) 1979-03-28 1979-03-28 Electronic watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3549879A JPS55128188A (en) 1979-03-28 1979-03-28 Electronic watch

Publications (1)

Publication Number Publication Date
JPS55128188A true JPS55128188A (en) 1980-10-03

Family

ID=12443407

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3549879A Pending JPS55128188A (en) 1979-03-28 1979-03-28 Electronic watch

Country Status (1)

Country Link
JP (1) JPS55128188A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0566398A2 (en) * 1992-04-17 1993-10-20 Seiko Epson Corporation A digital trimming circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0566398A2 (en) * 1992-04-17 1993-10-20 Seiko Epson Corporation A digital trimming circuit
EP0566398A3 (en) * 1992-04-17 1996-01-03 Seiko Epson Corp A digital trimming circuit
US5530407A (en) * 1992-04-17 1996-06-25 Seiko Epson Corporation Digital trimming for frequency adjustment
US5587691A (en) * 1992-04-17 1996-12-24 Seiko Epson Corporation Digital trimming for frequency adjustment

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