JPS55166076A - Circuit for electronic watch - Google Patents
Circuit for electronic watchInfo
- Publication number
- JPS55166076A JPS55166076A JP7383379A JP7383379A JPS55166076A JP S55166076 A JPS55166076 A JP S55166076A JP 7383379 A JP7383379 A JP 7383379A JP 7383379 A JP7383379 A JP 7383379A JP S55166076 A JPS55166076 A JP S55166076A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- voltage
- converter
- driving
- transmission gate
- 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
Abstract
PURPOSE: To compensate the driving force of an electromagnetic converter in an electronic watch by employing a charging and discharging system for driving the converter to enable to drive the converter with a voltage converter circuit having a high impedance and providing a power supply switching circuit.
CONSTITUTION: The supply voltage VDDH of a battery 35 is converted into a 1.5V output voltage VDDL through a voltage converter circuit 36 for lowering the voltage to 1/2 to drive a circuit 30 for a watch. A transmission gate TG41 is off while a transmission gate TG42 is on in normal operating state, the voltage VDDL is supplied to a driving power supply circuit 37, and a converter driving circuit 34 becomes the driving state due to low voltage charged in a capacitor 38. Since the transmission gate TG41 is converted to on while the transmission gate TG42 is converted to off in the calender member feeding state, the voltage VDDH is supplied from the battery 35 to the driving power supply circuit 37, and the converter driving circuit 34 becomes high output driving state due to high voltage.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7383379A JPS55166076A (en) | 1979-06-13 | 1979-06-13 | Circuit for electronic watch |
US06/064,449 US4221111A (en) | 1978-08-15 | 1979-08-07 | Electronic timepiece having a voltage conversion circuit |
GB7928472A GB2032654B (en) | 1978-08-16 | 1979-08-15 | Electronic timepiece having a voltage conversion circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7383379A JPS55166076A (en) | 1979-06-13 | 1979-06-13 | Circuit for electronic watch |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55166076A true JPS55166076A (en) | 1980-12-24 |
Family
ID=13529530
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7383379A Pending JPS55166076A (en) | 1978-08-15 | 1979-06-13 | Circuit for electronic watch |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55166076A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5814075A (en) * | 1981-07-17 | 1983-01-26 | Seikosha Co Ltd | Clock with accessory mechanism |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5384769A (en) * | 1976-12-29 | 1978-07-26 | Seiko Epson Corp | Electronic wristwatch |
JPS53110354A (en) * | 1977-03-09 | 1978-09-27 | Hitachi Ltd | Oscillator circuit |
JPS549665A (en) * | 1977-06-23 | 1979-01-24 | Nippon Precision Circuits | Electronic timepiece |
JPS5422864A (en) * | 1977-07-21 | 1979-02-21 | Citizen Watch Co Ltd | Motor drive circuit electronic watch |
-
1979
- 1979-06-13 JP JP7383379A patent/JPS55166076A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5384769A (en) * | 1976-12-29 | 1978-07-26 | Seiko Epson Corp | Electronic wristwatch |
JPS53110354A (en) * | 1977-03-09 | 1978-09-27 | Hitachi Ltd | Oscillator circuit |
JPS549665A (en) * | 1977-06-23 | 1979-01-24 | Nippon Precision Circuits | Electronic timepiece |
JPS5422864A (en) * | 1977-07-21 | 1979-02-21 | Citizen Watch Co Ltd | Motor drive circuit electronic watch |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5814075A (en) * | 1981-07-17 | 1983-01-26 | Seikosha Co Ltd | Clock with accessory mechanism |
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