JPS551747A - Crystal oscillator circuit - Google Patents
Crystal oscillator circuitInfo
- 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
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
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0799411A (en) * | 1993-09-28 | 1995-04-11 | Japan Radio Co Ltd | Crystal oscillation circuit |
-
1978
- 1978-06-20 JP JP7451578A patent/JPS551747A/en active Pending
Cited By (1)
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 |