JPS55110981A - Electronic watch - Google Patents

Electronic watch

Info

Publication number
JPS55110981A
JPS55110981A JP1807579A JP1807579A JPS55110981A JP S55110981 A JPS55110981 A JP S55110981A JP 1807579 A JP1807579 A JP 1807579A JP 1807579 A JP1807579 A JP 1807579A JP S55110981 A JPS55110981 A JP S55110981A
Authority
JP
Japan
Prior art keywords
resonance
temperature characteristic
crystal resonators
electronic watch
resonance circuit
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
JP1807579A
Other languages
Japanese (ja)
Inventor
Shigeru Morokawa
Yoshiki Iwakura
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 JP1807579A priority Critical patent/JPS55110981A/en
Publication of JPS55110981A publication Critical patent/JPS55110981A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To improve the temperature characteristic while upgrading the massproductivity by combining a plurality of crystal resonators.
CONSTITUTION: The resonance signals of resonance circuits 102W104 including crystal resonators are added 105. The addition output is converted into a constant amplitude of strained waveform with a saturable amplifier 101 to drive each resonance circuit. As a result, each resonance circuit performs a linear combined resonance action thereby affording a simple temperature characteristic curve f-ABC.
COPYRIGHT: (C)1980,JPO&Japio
JP1807579A 1979-02-19 1979-02-19 Electronic watch Pending JPS55110981A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1807579A JPS55110981A (en) 1979-02-19 1979-02-19 Electronic watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1807579A JPS55110981A (en) 1979-02-19 1979-02-19 Electronic watch

Publications (1)

Publication Number Publication Date
JPS55110981A true JPS55110981A (en) 1980-08-27

Family

ID=11961530

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1807579A Pending JPS55110981A (en) 1979-02-19 1979-02-19 Electronic watch

Country Status (1)

Country Link
JP (1) JPS55110981A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4745376A (en) * 1987-02-06 1988-05-17 Honeywell Inc. Fault tolerant oscillator circuit having redundant resonant elements
WO2002095930A1 (en) * 2001-05-21 2002-11-28 Thomson Licensing S.A. Wide band voltage controlled crystal oscillator
US6707347B2 (en) * 2001-01-26 2004-03-16 Nihon Dempa Kogyo, Co., Ltd. Crystal oscillator that utilizes the power transistor of an output amplifier to heat the crystal resonator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4745376A (en) * 1987-02-06 1988-05-17 Honeywell Inc. Fault tolerant oscillator circuit having redundant resonant elements
US6707347B2 (en) * 2001-01-26 2004-03-16 Nihon Dempa Kogyo, Co., Ltd. Crystal oscillator that utilizes the power transistor of an output amplifier to heat the crystal resonator
WO2002095930A1 (en) * 2001-05-21 2002-11-28 Thomson Licensing S.A. Wide band voltage controlled crystal oscillator
US7180382B2 (en) 2001-05-21 2007-02-20 Thomson Licensing Wide band voltage controlled crystal oscillator

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