JPS55166076A - Circuit for electronic watch - Google Patents

Circuit for electronic watch

Info

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
Application number
JP7383379A
Other languages
Japanese (ja)
Inventor
Shingo Ichikawa
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.)
Citizen Watch Co Ltd
Original Assignee
Citizen Watch 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 Citizen Watch Co Ltd filed Critical Citizen Watch Co Ltd
Priority to JP7383379A priority Critical patent/JPS55166076A/en
Priority to US06/064,449 priority patent/US4221111A/en
Priority to GB7928472A priority patent/GB2032654B/en
Publication of JPS55166076A publication Critical patent/JPS55166076A/en
Pending legal-status Critical Current

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
JP7383379A 1978-08-15 1979-06-13 Circuit for electronic watch Pending JPS55166076A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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