JPS5726903A - Oscillator - Google Patents

Oscillator

Info

Publication number
JPS5726903A
JPS5726903A JP10173880A JP10173880A JPS5726903A JP S5726903 A JPS5726903 A JP S5726903A JP 10173880 A JP10173880 A JP 10173880A JP 10173880 A JP10173880 A JP 10173880A JP S5726903 A JPS5726903 A JP S5726903A
Authority
JP
Japan
Prior art keywords
capacitor
protective layer
layer
oscillator
capacitors
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
JP10173880A
Other languages
Japanese (ja)
Inventor
Hitoshi Ikeno
Tetsuo Konno
Hirofumi Yanagi
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.)
Seikosha KK
Original Assignee
Seikosha KK
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 Seikosha KK filed Critical Seikosha KK
Priority to JP10173880A priority Critical patent/JPS5726903A/en
Publication of JPS5726903A publication Critical patent/JPS5726903A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
    • H03B5/32—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator

Landscapes

  • Oscillators With Electromechanical Resonators (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)

Abstract

PURPOSE:To decrease the fluctuation in an oscillation frequency, by separating a capacitor into a fixed capacitor and a variable capacitor and covering the fixed capacitor only with a protective layer. CONSTITUTION:An oscillator is constituted with a quartz oscillator 9, inverter 11, feedback resistor 26, and capacitors 24, 25. A capacitor 25 is separated with a fixed capacitor 25a and a variable capacitor 25b for trimming. The capacitors 24, 25a, 25b are formed by laminating conductor layers 19, 20, dielectric substance layer 21, and conductor layer 22 on a substrate 18 with wiring pattern connecting circuit elements. A protective layer 23 is formed at the uppermost part corresponding to an electrode 20a being one electrode, and since the adjustment of capacitance of the variable capacitor 25b is made by eliminating the conductor layer 22 in the notch of the protective layer 23, the capacitance change due to oxidation and corrosion of the trimming part is small.
JP10173880A 1980-07-24 1980-07-24 Oscillator Pending JPS5726903A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10173880A JPS5726903A (en) 1980-07-24 1980-07-24 Oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10173880A JPS5726903A (en) 1980-07-24 1980-07-24 Oscillator

Publications (1)

Publication Number Publication Date
JPS5726903A true JPS5726903A (en) 1982-02-13

Family

ID=14308589

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10173880A Pending JPS5726903A (en) 1980-07-24 1980-07-24 Oscillator

Country Status (1)

Country Link
JP (1) JPS5726903A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6181005A (en) * 1984-09-28 1986-04-24 Seikosha Co Ltd Oscillating circuit
JPS63283219A (en) * 1987-05-14 1988-11-21 Murata Mfg Co Ltd Manufacture of piezoelectric component
JPH0264224U (en) * 1989-10-19 1990-05-15
US6215370B1 (en) 1997-01-16 2001-04-10 Nippon Precision Circuits Inc. Crystal oscillator circuit with crystal reducing resistance and integrated circuit therefor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS503672A (en) * 1973-05-14 1975-01-16

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS503672A (en) * 1973-05-14 1975-01-16

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6181005A (en) * 1984-09-28 1986-04-24 Seikosha Co Ltd Oscillating circuit
JPS63283219A (en) * 1987-05-14 1988-11-21 Murata Mfg Co Ltd Manufacture of piezoelectric component
JPH0264224U (en) * 1989-10-19 1990-05-15
US6215370B1 (en) 1997-01-16 2001-04-10 Nippon Precision Circuits Inc. Crystal oscillator circuit with crystal reducing resistance and integrated circuit therefor

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