JPS5518929A - Electronic watch - Google Patents

Electronic watch

Info

Publication number
JPS5518929A
JPS5518929A JP9130878A JP9130878A JPS5518929A JP S5518929 A JPS5518929 A JP S5518929A JP 9130878 A JP9130878 A JP 9130878A JP 9130878 A JP9130878 A JP 9130878A JP S5518929 A JPS5518929 A JP S5518929A
Authority
JP
Japan
Prior art keywords
signal
zero
interrupting
rms
voltage
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
JP9130878A
Other languages
Japanese (ja)
Inventor
Fukuo Sekiya
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 JP9130878A priority Critical patent/JPS5518929A/en
Publication of JPS5518929A publication Critical patent/JPS5518929A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D7/00—Measuring, counting, calibrating, testing or regulating apparatus
    • G04D7/002—Electrical measuring and testing apparatus
    • G04D7/003—Electrical measuring and testing apparatus for electric or electronic clocks

Landscapes

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

Abstract

PURPOSE:To facilitate the tests of an integrated circuit by interrupting the operations of means for periodically reducing a voltage, which is to be impressed upon a liquid crystal display device, to a zero time when a test mode detecting signal is generated. CONSTITUTION:When a test mode detecting signal is generated under the condition with an adjusting terminal 112 being connected to an ''H'', and when a main voltage reduction predicting signal is generated, the output of an OR 128 is raised to the ''H'' so that the RESET signal is raised to the ''H''. The pulse width of an interrupting signal at that time is reduced to zero. Since the pulse widths of the interrupting signal are set at 7/16, 5/16, 1/16 and zero, if the effective voltage to be fed to a liquid crystal from a drive signal left uniterrupted is denoted at V rms, the voltage to be impressed with the pulse width of 1/16 and zero is expressed by V rms X(15/16)<1/2>, V rms. As a result, when the logic circuit is brought into a test mode, if the setting is made such that the pulse width of the interrupting signal is reduced to zero, the drive waveforms are simplified so that the tests can be easily performed.
JP9130878A 1978-07-26 1978-07-26 Electronic watch Pending JPS5518929A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9130878A JPS5518929A (en) 1978-07-26 1978-07-26 Electronic watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9130878A JPS5518929A (en) 1978-07-26 1978-07-26 Electronic watch

Publications (1)

Publication Number Publication Date
JPS5518929A true JPS5518929A (en) 1980-02-09

Family

ID=14022829

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9130878A Pending JPS5518929A (en) 1978-07-26 1978-07-26 Electronic watch

Country Status (1)

Country Link
JP (1) JPS5518929A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0481912A (en) * 1990-07-24 1992-03-16 Sharp Corp Voltage drop circuit of semiconductor device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0481912A (en) * 1990-07-24 1992-03-16 Sharp Corp Voltage drop circuit of semiconductor device

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