JPS5798890A - Clock forming circuit for stop watch of electronic watch - Google Patents

Clock forming circuit for stop watch of electronic watch

Info

Publication number
JPS5798890A
JPS5798890A JP17518080A JP17518080A JPS5798890A JP S5798890 A JPS5798890 A JP S5798890A JP 17518080 A JP17518080 A JP 17518080A JP 17518080 A JP17518080 A JP 17518080A JP S5798890 A JPS5798890 A JP S5798890A
Authority
JP
Japan
Prior art keywords
decimal
watch
speed
gates
stop watch
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
JP17518080A
Other languages
Japanese (ja)
Other versions
JPH0130118B2 (en
Inventor
Toshimasa Yoshinami
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.)
Seiko Epson Corp
Suwa Seikosha KK
SHIMAUCHI SEIKI KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
SHIMAUCHI SEIKI KK
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 Seiko Epson Corp, Suwa Seikosha KK, SHIMAUCHI SEIKI KK filed Critical Seiko Epson Corp
Priority to JP17518080A priority Critical patent/JPS5798890A/en
Publication of JPS5798890A publication Critical patent/JPS5798890A/en
Publication of JPH0130118B2 publication Critical patent/JPH0130118B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G3/00—Producing timing pulses
    • G04G3/02—Circuits for deriving low frequency timing pulses from pulses of higher frequency
    • G04G3/022—Circuits for deriving low frequency timing pulses from pulses of higher frequency the desired number of pulses per unit of time being obtained by adding to or substracting from a pulse train one or more pulses

Landscapes

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

Abstract

PURPOSE:To reduce the number of transistors used and make uniform as far as possible the distance between adjacent positions of signals that are to be crossed out by simplifying the constitution of a control circuit of signal formation for a stop watch. CONSTITUTION:The control circuit for crossing out 28 shots per second out of 128Hz frequency division signal 423 is provided with an inverter 401, gates 402- 404, inverter 405 and FF406, to form 100Hz signal for a stop watch. The above mentioned crossing out operation is provided with a decimal counters FF412- 415 that count decimal figures 0-9 with the speed of 1/100 seconds order for a decimal point, a group of gates 416-419 that detect a specified state from data at the speed of 1/100 seconds order for a decimal point, a decimal figures, 0-9 at the speed of 1/10 seconds order for a decimal point, and decimal number detecting gates 430-431.
JP17518080A 1980-12-11 1980-12-11 Clock forming circuit for stop watch of electronic watch Granted JPS5798890A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17518080A JPS5798890A (en) 1980-12-11 1980-12-11 Clock forming circuit for stop watch of electronic watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17518080A JPS5798890A (en) 1980-12-11 1980-12-11 Clock forming circuit for stop watch of electronic watch

Publications (2)

Publication Number Publication Date
JPS5798890A true JPS5798890A (en) 1982-06-19
JPH0130118B2 JPH0130118B2 (en) 1989-06-16

Family

ID=15991663

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17518080A Granted JPS5798890A (en) 1980-12-11 1980-12-11 Clock forming circuit for stop watch of electronic watch

Country Status (1)

Country Link
JP (1) JPS5798890A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52114371A (en) * 1976-03-23 1977-09-26 Toshiba Corp Approximating counter for use in time measurement

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52114371A (en) * 1976-03-23 1977-09-26 Toshiba Corp Approximating counter for use in time measurement

Also Published As

Publication number Publication date
JPH0130118B2 (en) 1989-06-16

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