JPS57104882A - Power on clear circuit in electronic watch - Google Patents
Power on clear circuit in electronic watchInfo
- Publication number
- JPS57104882A JPS57104882A JP55181737A JP18173780A JPS57104882A JP S57104882 A JPS57104882 A JP S57104882A JP 55181737 A JP55181737 A JP 55181737A JP 18173780 A JP18173780 A JP 18173780A JP S57104882 A JPS57104882 A JP S57104882A
- Authority
- JP
- Japan
- Prior art keywords
- power
- control circuit
- circuit
- reset signal
- system reset
- 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
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G19/00—Electric power supply circuits specially adapted for use in electronic time-pieces
- G04G19/10—Arrangements for supplying back-up power
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electric Clocks (AREA)
- Electromechanical Clocks (AREA)
Abstract
PURPOSE:To prevent wrong indication of time data and the like due to electric noises and variation in a power source by imparting a system reset signal generated in a power on clear circuit only to an alarm control circuit and a better up control circuit. CONSTITUTION:When power is supplied to a circuit, the system reset signal is generated in the power on clear circuit 128 and applied to only the alarm control circuit 125 and the better up control circuit 127. Therefore, even though the system reset signal is generated due to the electric noises or the variation in the power source, the time data 104-110, preset data of alarming time 111-114, and measuring data of a stopwatch 119-122 are not destroyed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55181737A JPS57104882A (en) | 1980-12-22 | 1980-12-22 | Power on clear circuit in electronic watch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55181737A JPS57104882A (en) | 1980-12-22 | 1980-12-22 | Power on clear circuit in electronic watch |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57104882A true JPS57104882A (en) | 1982-06-30 |
Family
ID=16105999
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55181737A Pending JPS57104882A (en) | 1980-12-22 | 1980-12-22 | Power on clear circuit in electronic watch |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57104882A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6033684U (en) * | 1983-08-16 | 1985-03-07 | 株式会社精工舎 | All-electronic alarm clock |
JPS62240893A (en) * | 1985-09-03 | 1987-10-21 | Seiko Epson Corp | Electronic timepiece |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53118077A (en) * | 1977-01-17 | 1978-10-16 | Texas Instruments Deutschland | Electronic timepiece |
JPS5483475A (en) * | 1977-12-15 | 1979-07-03 | Matsushita Electric Works Ltd | Electronic time striking circuit |
JPS5517426A (en) * | 1978-07-24 | 1980-02-06 | Citizen Watch Co Ltd | Initial value set circuit for electronic watch |
JPS5557169A (en) * | 1978-10-20 | 1980-04-26 | Citizen Watch Co Ltd | Initial value setting circuit for electronic watch |
JPS5582091A (en) * | 1978-12-15 | 1980-06-20 | Seiko Instr & Electronics Ltd | Automatic clear circuit |
JPS55123716A (en) * | 1979-03-16 | 1980-09-24 | Toshiba Corp | Malfunction prevention unit of control system |
-
1980
- 1980-12-22 JP JP55181737A patent/JPS57104882A/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53118077A (en) * | 1977-01-17 | 1978-10-16 | Texas Instruments Deutschland | Electronic timepiece |
JPS5483475A (en) * | 1977-12-15 | 1979-07-03 | Matsushita Electric Works Ltd | Electronic time striking circuit |
JPS5517426A (en) * | 1978-07-24 | 1980-02-06 | Citizen Watch Co Ltd | Initial value set circuit for electronic watch |
JPS5557169A (en) * | 1978-10-20 | 1980-04-26 | Citizen Watch Co Ltd | Initial value setting circuit for electronic watch |
JPS5582091A (en) * | 1978-12-15 | 1980-06-20 | Seiko Instr & Electronics Ltd | Automatic clear circuit |
JPS55123716A (en) * | 1979-03-16 | 1980-09-24 | Toshiba Corp | Malfunction prevention unit of control system |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6033684U (en) * | 1983-08-16 | 1985-03-07 | 株式会社精工舎 | All-electronic alarm clock |
JPS6221997Y2 (en) * | 1983-08-16 | 1987-06-04 | ||
JPS62240893A (en) * | 1985-09-03 | 1987-10-21 | Seiko Epson Corp | Electronic timepiece |
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