JPS55154490A - Lamp control circuit of electronic watch - Google Patents

Lamp control circuit of electronic watch

Info

Publication number
JPS55154490A
JPS55154490A JP6248579A JP6248579A JPS55154490A JP S55154490 A JPS55154490 A JP S55154490A JP 6248579 A JP6248579 A JP 6248579A JP 6248579 A JP6248579 A JP 6248579A JP S55154490 A JPS55154490 A JP S55154490A
Authority
JP
Japan
Prior art keywords
lamp
lighting
voltage
comparator
current
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
JP6248579A
Other languages
English (en)
Inventor
Yoshihiko Hirayama
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 Instruments Inc
Original Assignee
Seiko Instruments Inc
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 Instruments Inc filed Critical Seiko Instruments Inc
Priority to JP6248579A priority Critical patent/JPS55154490A/ja
Publication of JPS55154490A publication Critical patent/JPS55154490A/ja
Pending legal-status Critical Current

Links

Landscapes

  • Electric Clocks (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
JP6248579A 1979-05-21 1979-05-21 Lamp control circuit of electronic watch Pending JPS55154490A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6248579A JPS55154490A (en) 1979-05-21 1979-05-21 Lamp control circuit of electronic watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6248579A JPS55154490A (en) 1979-05-21 1979-05-21 Lamp control circuit of electronic watch

Publications (1)

Publication Number Publication Date
JPS55154490A true JPS55154490A (en) 1980-12-02

Family

ID=13201520

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6248579A Pending JPS55154490A (en) 1979-05-21 1979-05-21 Lamp control circuit of electronic watch

Country Status (1)

Country Link
JP (1) JPS55154490A (ja)

Similar Documents

Publication Publication Date Title
JPS52114915A (en) Dc-dc converter
JPS55154490A (en) Lamp control circuit of electronic watch
JPS57103522A (en) Power supply device
JPS5425415A (en) Inverter controller
JPS551653A (en) Switching unit
JPS5431546A (en) Direct current constant voltage electric source device
JPS5236746A (en) Stabilizing circuit of voltage
JPS52118973A (en) Adjusting and lighting device for discharge lamp
JPS55154491A (en) Lamp control circuit of electronic watch
JPS5497724A (en) Forward and reverse rotation control circuit for dc motor
JPS5239158A (en) Switching regulator
JPS54118641A (en) Control method of and apparatus for air cinditioner
JPS54152718A (en) Current limiting circuit for ignitor
JPS56122525A (en) Switch circuit using semiconductor
JPS5333347A (en) Power supply circuit of switching control type
JPS5518827A (en) Turn-off circuit for thyristor
JPS5210042A (en) Level transforming circuit
JPS5547518A (en) Constant current circuit
JPS524038A (en) Stabilized power source circuit
JPS57101914A (en) Electric power supplying circuit
JPS57183268A (en) Switching regulator
JPS5563591A (en) Revolution control device
JPS5393671A (en) Control circuit for discharge lamp lighting apparatus
JPS5382069A (en) Discharge lamp lighting apparatus
JPS57202106A (en) Oscillation circuit