JPS551747A - Crystal oscillator circuit - Google Patents

Crystal oscillator circuit

Info

Publication number
JPS551747A
JPS551747A JP7451578A JP7451578A JPS551747A JP S551747 A JPS551747 A JP S551747A JP 7451578 A JP7451578 A JP 7451578A JP 7451578 A JP7451578 A JP 7451578A JP S551747 A JPS551747 A JP S551747A
Authority
JP
Japan
Prior art keywords
capacitors
temperature
circuit
crystal oscillator
crystal oscillation
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
JP7451578A
Other languages
Japanese (ja)
Inventor
Kazumitsu Kosaka
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.)
Casio Computer Co Ltd
Original Assignee
Casio Computer 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 Casio Computer Co Ltd filed Critical Casio Computer Co Ltd
Priority to JP7451578A priority Critical patent/JPS551747A/en
Publication of JPS551747A publication Critical patent/JPS551747A/en
Pending legal-status Critical Current

Links

Landscapes

  • Oscillators With Electromechanical Resonators (AREA)

Abstract

PURPOSE: To sufficiently achieve the functions of temperature compensation, by constituting the temperature compensation capacitor for the crystal oscillation circuit with a plurality of capacitors different in temperature coefficient and selecting the capacitors depending on the output of the temperature detection means.
CONSTITUTION: In the crystal oscillation circuit consisting of the crystal oscillator 11, FET 17,18 constituting the amplifying circuit, feedback resistor 20 and frequency adjusting capacitor 12, the temperature compensation capacitors 13,14 are constituted with capacitors different in temperature coefficient. Further, the selection of the capacitors 13 and 14 is made depending on the voltage based on the detected temperature by means of the thermister 163 and the resistor 164 placed in the temperature detection circuit 16 connected to the selection circuit 15, to always keep constant the oscillation frequency of the crystal oscillation circuit.
COPYRIGHT: (C)1980,JPO&Japio
JP7451578A 1978-06-20 1978-06-20 Crystal oscillator circuit Pending JPS551747A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7451578A JPS551747A (en) 1978-06-20 1978-06-20 Crystal oscillator circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7451578A JPS551747A (en) 1978-06-20 1978-06-20 Crystal oscillator circuit

Publications (1)

Publication Number Publication Date
JPS551747A true JPS551747A (en) 1980-01-08

Family

ID=13549538

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7451578A Pending JPS551747A (en) 1978-06-20 1978-06-20 Crystal oscillator circuit

Country Status (1)

Country Link
JP (1) JPS551747A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0799411A (en) * 1993-09-28 1995-04-11 Japan Radio Co Ltd Crystal oscillation circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0799411A (en) * 1993-09-28 1995-04-11 Japan Radio Co Ltd Crystal oscillation circuit

Similar Documents

Publication Publication Date Title
JPS53111264A (en) Oscillator
JPS5369685A (en) Temperature measuring apparatus
JPS551747A (en) Crystal oscillator circuit
IT7923479A0 (en) CIRCUIT ARRANGEMENT SUITABLE TO COMPENSATE THE FREQUENCY VARIATIONS, DEPENDING ON THE TEMPERATURE VARIATIONS, OF A QUARTZ OSCILLATOR.
JPS5555604A (en) Piezoelectric oscillator of temperature compensation type
JPS5579506A (en) Oscillator
JPS55104105A (en) Temperature compensation circuit for crystal oscillation circuit
JPS5356737A (en) High-frequency heater
JPS5565188A (en) Electronic watch
JPS55125703A (en) Voltage controlled crystal oscillator
JPS55114006A (en) Synchronous type crystal oscillator
JPS5582510A (en) Piezoelectric oscillator of temperature compensation type
JPS5683102A (en) Temperature compensation type piezoelectric oscillator
JPS5523632A (en) Control unit of relaxation oscillation circuit
JPS567025A (en) Vibration sensor
JPS5541041A (en) Channel number counter
JPS56107606A (en) Voltage control type piezoelectric oscillator
JPS5458339A (en) Crystal oscillation circuit
JPS5482054A (en) Power supply
JPS5644886A (en) Electronic wrist watch with temperature compensation
JPS5541026A (en) Crystal oscillator of temperature compensation
JPS5436555A (en) Harmonic filter
JPS5451386A (en) Microwave solid-state oscillator
JPS57101731A (en) Device for detecting temperature
JPS6441305A (en) Method for correcting temperature characteristic of crystal oscillator