CH644985GA3 - - Google Patents

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Publication number
CH644985GA3
CH644985GA3 CH426680A CH426680A CH644985GA3 CH 644985G A3 CH644985G A3 CH 644985GA3 CH 426680 A CH426680 A CH 426680A CH 426680 A CH426680 A CH 426680A CH 644985G A3 CH644985G A3 CH 644985GA3
Authority
CH
Switzerland
Prior art keywords
major
temperature
resonator
compensating circuit
subsidiary
Prior art date
Application number
CH426680A
Other languages
French (fr)
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 filed Critical
Publication of CH644985GA3 publication Critical patent/CH644985GA3/fr

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G3/00—Producing timing pulses
    • G04G3/02—Circuits for deriving low frequency timing pulses from pulses of higher frequency
    • G04G3/027—Circuits for deriving low frequency timing pulses from pulses of higher frequency by combining pulse-trains of different frequencies, e.g. obtained from two independent oscillators or from a common oscillator by means of different frequency dividing ratios

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Electric Clocks (AREA)
  • Amplifiers (AREA)

Abstract

Temperature compensating circuit for an electronic timepiece having two piezo electric resonators having different frequency-temperature characteristics. Two piezo electric resonators are a major resonator having smaller frequency variation rate in temperature variation and a subsidiary resonator having larger frequency variation rate in temperature variation. And also the temperature compensating circuit includes a variable counter for counting the output signal of the major oscillator having the major resonator, a gate time setting circuit controlled by both the outputs of subsidiary and the variable counter, and a counter for counting the output signal of the major oscillator. As a result, the temperature compensating circuit is able to improve the accuracy of the timepiece.
CH426680A 1979-06-01 1980-06-02 CH644985GA3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6824779A JPS55160891A (en) 1979-06-01 1979-06-01 Temperature correcting circuit

Publications (1)

Publication Number Publication Date
CH644985GA3 true CH644985GA3 (en) 1984-09-14

Family

ID=13368238

Family Applications (1)

Application Number Title Priority Date Filing Date
CH426680A CH644985GA3 (en) 1979-06-01 1980-06-02

Country Status (4)

Country Link
US (1) US4325036A (en)
JP (1) JPS55160891A (en)
CH (1) CH644985GA3 (en)
GB (1) GB2054215B (en)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH643106B (en) * 1980-11-26 Suisse Horlogerie TIME-GUARD INCLUDING A CHAIN OF DIVIDERS WITH ADJUSTABLE DIVISION RATIO.
JPS5883296A (en) * 1981-11-13 1983-05-19 Citizen Watch Co Ltd Electronic time piece
US4443116A (en) * 1981-01-09 1984-04-17 Citizen Watch Company Limited Electronic timepiece
CH650122GA3 (en) * 1981-12-17 1985-07-15
US4872765A (en) * 1983-04-20 1989-10-10 The United States Of America As Represented By The Secretary Of The Army Dual mode quartz thermometric sensing device
US4505599A (en) * 1983-05-06 1985-03-19 Kabushiki Kaisha Daini Seikosha Electronic clinical thermometer
US4616173A (en) * 1984-03-21 1986-10-07 Sencore, Inc. Frequency counter
US5428315A (en) * 1985-01-22 1995-06-27 The United States Of America As Represented By The Secreatry Of The Army Method of making radiation hardened quartz crystal oscillators
FR2614116B1 (en) * 1987-04-17 1989-07-21 Centre Nat Etd Spatiales TIME REFERENCE DEVICE WITH SUBSTANTIALLY CONSTANT STABILITY FOR SHORT AND LONG TERM MEASUREMENT
US5644271A (en) * 1996-03-05 1997-07-01 Mehta Tech, Inc. Temperature compensated clock
US6086244A (en) * 1997-03-20 2000-07-11 Stmicroelectronics, Inc. Low power, cost effective, temperature compensated, real time clock and method of clocking systems
US6304517B1 (en) * 1999-06-18 2001-10-16 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for real time clock frequency error correction
FR2808597B1 (en) * 2000-05-02 2002-07-12 Schneider Electric Ind Sa INDUCTIVE OR CAPACITIVE DETECTOR
US7212075B2 (en) * 2003-07-18 2007-05-01 Halliburton Energy Services, Inc. Downhole clock having temperature compensation
FR2874259A1 (en) * 2004-08-12 2006-02-17 St Microelectronics Sa ELECTRONIC CIRCUIT EQUIPPED FOR EVALUATING ITS TEMPERATURE, METHOD OF EVALUATING TEMPERATURE, AND APPLICATIONS
US7545228B1 (en) * 2007-09-12 2009-06-09 Sitime Inc. Dynamic temperature compensation for a digitally controlled oscillator using dual MEMS resonators
US7800457B2 (en) * 2007-12-05 2010-09-21 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. Self-calibrating temperature-compensated oscillator
GB2459304B (en) * 2008-04-18 2013-02-20 Nujira Ltd Improved pulse width modulation
US8368478B2 (en) * 2009-02-13 2013-02-05 Silego Technology, Inc. Integrated circuit frequency generator
CN101944899A (en) * 2009-07-02 2011-01-12 瑞昱半导体股份有限公司 Integrated circuit with low temperature coefficient and associated calibration method
US8106715B1 (en) * 2009-12-04 2012-01-31 Qualcomm Atheros, Inc. Low-power oscillator
US8344817B2 (en) * 2010-12-22 2013-01-01 Atmel Corporation Compensating DFLL with error averaging
JP5782724B2 (en) * 2011-01-28 2015-09-24 日本電波工業株式会社 Oscillator
EP2525265B1 (en) * 2011-05-14 2015-06-03 Johnson Controls Automotive Electronics GmbH Method of operation of a timepiece device
US8488506B2 (en) 2011-06-28 2013-07-16 Qualcomm Incorporated Oscillator settling time allowance
JP5863394B2 (en) * 2011-11-02 2016-02-16 日本電波工業株式会社 Oscillator
US8975969B1 (en) * 2013-01-22 2015-03-10 Rockwell Collins, Inc. Control system with both fast sample time and long gate time

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5071362A (en) * 1973-10-24 1975-06-13
GB1570659A (en) * 1976-06-30 1980-07-02 Suwa Seikosha Kk Electronic timepiece
JPS5473671A (en) * 1977-11-25 1979-06-13 Seiko Epson Corp Semiconductor integrated circuit for watch
JPS54154247A (en) * 1978-05-26 1979-12-05 Nec Corp Temperature compensating type piezoelectric oscillator
JPS5542001A (en) * 1978-09-20 1980-03-25 Citizen Watch Co Ltd Electronic clock
JPS5547479A (en) * 1978-09-30 1980-04-03 Citizen Watch Co Ltd Electronic watch with temperature compensator
JPS55112043A (en) * 1979-02-22 1980-08-29 Seiko Instr & Electronics Ltd Standard signal generator

Also Published As

Publication number Publication date
US4325036A (en) 1982-04-13
JPS55160891A (en) 1980-12-15
GB2054215B (en) 1983-04-27
GB2054215A (en) 1981-02-11

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