FR2437731A1 - Temp. compensated crystal oscillator - accommodates spread of component characteristics and uses potentiometer to select slope - Google Patents
Temp. compensated crystal oscillator - accommodates spread of component characteristics and uses potentiometer to select slopeInfo
- Publication number
- FR2437731A1 FR2437731A1 FR7827648A FR7827648A FR2437731A1 FR 2437731 A1 FR2437731 A1 FR 2437731A1 FR 7827648 A FR7827648 A FR 7827648A FR 7827648 A FR7827648 A FR 7827648A FR 2437731 A1 FR2437731 A1 FR 2437731A1
- Authority
- FR
- France
- Prior art keywords
- temp
- spread
- component characteristics
- crystal oscillator
- varactor
- 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.)
- Granted
Links
- 239000013078 crystal Substances 0.000 title abstract 4
- 239000003990 capacitor Substances 0.000 abstract 1
- 239000010453 quartz Substances 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L1/00—Stabilisation of generator output against variations of physical values, e.g. power supply
- H03L1/02—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only
- H03L1/022—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only by indirect stabilisation, i.e. by generating an electrical correction signal which is a function of the temperature
- H03L1/023—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only by indirect stabilisation, i.e. by generating an electrical correction signal which is a function of the temperature by using voltage variable capacitance diodes
Landscapes
- Oscillators With Electromechanical Resonators (AREA)
Abstract
The temp. compensated crystal oscillator overcomes problems associated with the spread of component characteristics used in such circuits. The circuit lends itself to mass-prodn. and is based on the use of varactor diodes and a compensating network. The crystal element, pref. quartz (1), is connected via one varactor diode (2) across an orthodox oscillator circuit (3) which has a DC stabilised power source (6) with a thermistor based compensation network (5) operating over a given temp. range. The DC source also supplies a frequency controlled potentiometer (8) and the crystal varactor junction via a fixed resistor (7). A further varactor diode (9) is AC coupled across the first via two capacitors (9") and has a resistor network (12, 13) including a slope characteristic selecting potentiometer (14) connected across it again fed from the DC source.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7827648A FR2437731A1 (en) | 1978-09-27 | 1978-09-27 | Temp. compensated crystal oscillator - accommodates spread of component characteristics and uses potentiometer to select slope |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7827648A FR2437731A1 (en) | 1978-09-27 | 1978-09-27 | Temp. compensated crystal oscillator - accommodates spread of component characteristics and uses potentiometer to select slope |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2437731A1 true FR2437731A1 (en) | 1980-04-25 |
FR2437731B1 FR2437731B1 (en) | 1981-02-13 |
Family
ID=9213087
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7827648A Granted FR2437731A1 (en) | 1978-09-27 | 1978-09-27 | Temp. compensated crystal oscillator - accommodates spread of component characteristics and uses potentiometer to select slope |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2437731A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0283529A1 (en) * | 1987-03-23 | 1988-09-28 | BRG Mechatronikai Vállalat | Circuit arrangement for the temperature compensation of AT-cut crystal oscillators, and method for the adjustment of the compensation |
US5693919A (en) * | 1994-11-15 | 1997-12-02 | Inventio Ag | Evacuation system for elevators |
EP0939488A1 (en) * | 1998-02-02 | 1999-09-01 | Sony International (Europe) GmbH | Voltage controlled tuning cicuit |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109586710A (en) * | 2018-11-30 | 2019-04-05 | 四川九洲电器集团有限责任公司 | A kind of temperature compensating crystal oscillator frequency tuning circuit |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1534232A (en) * | 1966-08-16 | 1968-07-26 | Int Standard Electric Corp | Temperature compensation circuit for crystal oscillators |
FR1565423A (en) * | 1968-01-08 | 1969-05-02 | ||
FR2138404A1 (en) * | 1971-05-25 | 1973-01-05 | Cepe | |
FR2284219A1 (en) * | 1974-09-06 | 1976-04-02 | Cepe | TEMPERATURE COMPENSATED CRYSTAL OSCILLATOR |
US4104599A (en) * | 1976-04-20 | 1978-08-01 | Trio Kabushiki Kaisha | Crystal oscillating circuit |
-
1978
- 1978-09-27 FR FR7827648A patent/FR2437731A1/en active Granted
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1534232A (en) * | 1966-08-16 | 1968-07-26 | Int Standard Electric Corp | Temperature compensation circuit for crystal oscillators |
FR1565423A (en) * | 1968-01-08 | 1969-05-02 | ||
FR2138404A1 (en) * | 1971-05-25 | 1973-01-05 | Cepe | |
FR2284219A1 (en) * | 1974-09-06 | 1976-04-02 | Cepe | TEMPERATURE COMPENSATED CRYSTAL OSCILLATOR |
US4104599A (en) * | 1976-04-20 | 1978-08-01 | Trio Kabushiki Kaisha | Crystal oscillating circuit |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0283529A1 (en) * | 1987-03-23 | 1988-09-28 | BRG Mechatronikai Vállalat | Circuit arrangement for the temperature compensation of AT-cut crystal oscillators, and method for the adjustment of the compensation |
US5693919A (en) * | 1994-11-15 | 1997-12-02 | Inventio Ag | Evacuation system for elevators |
EP0939488A1 (en) * | 1998-02-02 | 1999-09-01 | Sony International (Europe) GmbH | Voltage controlled tuning cicuit |
Also Published As
Publication number | Publication date |
---|---|
FR2437731B1 (en) | 1981-02-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |