JPS5679987A - Electronic timepiece with alarm function - Google Patents

Electronic timepiece with alarm function

Info

Publication number
JPS5679987A
JPS5679987A JP15726679A JP15726679A JPS5679987A JP S5679987 A JPS5679987 A JP S5679987A JP 15726679 A JP15726679 A JP 15726679A JP 15726679 A JP15726679 A JP 15726679A JP S5679987 A JPS5679987 A JP S5679987A
Authority
JP
Japan
Prior art keywords
pmosfet18
gate
resistance
voltage
sound
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
JP15726679A
Other languages
Japanese (ja)
Inventor
Hideyuki Kawashima
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 JP15726679A priority Critical patent/JPS5679987A/en
Publication of JPS5679987A publication Critical patent/JPS5679987A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G13/00—Producing acoustic time signals
    • G04G13/02—Producing acoustic time signals at preselected times, e.g. alarm clocks

Landscapes

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

Abstract

PURPOSE:To generate a sound with excellent envelope characteristic by an attenuated sound by use of a piezoelectric sound generator that operates with low electric power, by converting a musical scale signal, outputted by information in a sound, into an attenuation signal and then by applying it to a piezoelectric sound generator. CONSTITUTION:When positive pulse signal B is applied to gate G1 of NMOSFET15 periodically, NMOSFET15 turns on to charge capacitor 17. Then, when FET15 turns off, the charge in capacitor 17 is discharged by resistance 16, so that gate G2 of PMOSFET18 will be applied with a voltage that varies from potential VSS to VDD gradually. Musical scale signal A applied to source S2 of PMOSFET18 is voltage-divided by PMOSFET18 increasing in ON resistance gradually by the voltage applied to gate G2 and resistance 19, and applied to piezoelectric sound generator 13.
JP15726679A 1979-12-04 1979-12-04 Electronic timepiece with alarm function Pending JPS5679987A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15726679A JPS5679987A (en) 1979-12-04 1979-12-04 Electronic timepiece with alarm function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15726679A JPS5679987A (en) 1979-12-04 1979-12-04 Electronic timepiece with alarm function

Publications (1)

Publication Number Publication Date
JPS5679987A true JPS5679987A (en) 1981-06-30

Family

ID=15645892

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15726679A Pending JPS5679987A (en) 1979-12-04 1979-12-04 Electronic timepiece with alarm function

Country Status (1)

Country Link
JP (1) JPS5679987A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4487099A (en) * 1982-07-30 1984-12-11 Citizen Watch Company Limited Electro-acoustic transducer drive circuit for producing damped waveform envelope musical notes
US4529322A (en) * 1981-06-22 1985-07-16 Seiko Instruments & Electronics Ltd. Booster circuit for electronic watch elements
US4567806A (en) * 1982-09-09 1986-02-04 Kabushiki Kaisha Suwa Seikosha Sound generator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4529322A (en) * 1981-06-22 1985-07-16 Seiko Instruments & Electronics Ltd. Booster circuit for electronic watch elements
US4487099A (en) * 1982-07-30 1984-12-11 Citizen Watch Company Limited Electro-acoustic transducer drive circuit for producing damped waveform envelope musical notes
US4567806A (en) * 1982-09-09 1986-02-04 Kabushiki Kaisha Suwa Seikosha Sound generator

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