JPS5456754A - Crystal oscillator circuit - Google Patents

Crystal oscillator circuit

Info

Publication number
JPS5456754A
JPS5456754A JP12312277A JP12312277A JPS5456754A JP S5456754 A JPS5456754 A JP S5456754A JP 12312277 A JP12312277 A JP 12312277A JP 12312277 A JP12312277 A JP 12312277A JP S5456754 A JPS5456754 A JP S5456754A
Authority
JP
Japan
Prior art keywords
crystal
temperature
frequency
capacitor
series
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
JP12312277A
Other languages
Japanese (ja)
Inventor
Koichi Teruyama
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 and Electronics 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 Seiko Instruments and Electronics Ltd filed Critical Seiko Instruments and Electronics Ltd
Priority to JP12312277A priority Critical patent/JPS5456754A/en
Publication of JPS5456754A publication Critical patent/JPS5456754A/en
Pending legal-status Critical Current

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  • Electric Clocks (AREA)
  • Oscillators With Electromechanical Resonators (AREA)

Abstract

PURPOSE:To reduce the frequency fluctuation over a wide temperature range for the oscillator circuit in which two crystal oscillators are connected in parallel, by connecting a capacitor in series to one oscillator. CONSTITUTION:Capacitor 15 featuring the characteristics of about 0.3ppm/ deg.C like straight line 11 is connected in series to crystal oscillator 14 which features zero temperature coefficient Tp of about 38 deg.C as well as the frequency temperature characteristics like curve 10. As a result, such frequency temperature characteristics is obtained that Tp rises virtually from 38 deg.C up to 42 deg.C as shown by curve 12. Here, temperature compensating capacitor 15 is connected in series to crystal 14 of the high temperature side and connected in parallel to crystal 13 of the low temperature side respectively. Thus, frequency temperature characteristics 17 of crystal 14 is corrected by capacitor 15, and then frquency temperature characteristics 18 is obtained through virtual rise-up of Tp. Characteristics 18 is then compounded with frequency temperature characteristics 16 of crystal 13 to secure characteristics 19 featuring reduced frequency fluctuation over a wide temperature range.
JP12312277A 1977-10-14 1977-10-14 Crystal oscillator circuit Pending JPS5456754A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12312277A JPS5456754A (en) 1977-10-14 1977-10-14 Crystal oscillator circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12312277A JPS5456754A (en) 1977-10-14 1977-10-14 Crystal oscillator circuit

Publications (1)

Publication Number Publication Date
JPS5456754A true JPS5456754A (en) 1979-05-08

Family

ID=14852722

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12312277A Pending JPS5456754A (en) 1977-10-14 1977-10-14 Crystal oscillator circuit

Country Status (1)

Country Link
JP (1) JPS5456754A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5769905A (en) * 1980-10-20 1982-04-30 Seiko Instr & Electronics Ltd Quartz oscillator for electronic timepiece with logical frequency temperature correction

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5769905A (en) * 1980-10-20 1982-04-30 Seiko Instr & Electronics Ltd Quartz oscillator for electronic timepiece with logical frequency temperature correction

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