JPH05283934A - Temperature compensation saw oscillator - Google Patents
Temperature compensation saw oscillatorInfo
- Publication number
- JPH05283934A JPH05283934A JP1964992A JP1964992A JPH05283934A JP H05283934 A JPH05283934 A JP H05283934A JP 1964992 A JP1964992 A JP 1964992A JP 1964992 A JP1964992 A JP 1964992A JP H05283934 A JPH05283934 A JP H05283934A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- oscillator
- resonator
- saw
- frequency
- 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.)
- Withdrawn
Links
Landscapes
- Oscillators With Electromechanical Resonators (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は温度補償ＳＡＷ発振器に
関し、特に通信機や計測器等に内蔵され、移動体通信、
屋外計測などの使用温度変化が激しい状態下で、常に出
力周波数を一定に保持する温度補償ＳＡＷ発振器に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature-compensated SAW oscillator, and in particular, it is incorporated in a communication device, a measuring instrument, etc.
The present invention relates to a temperature-compensated SAW oscillator that always keeps an output frequency constant under conditions such as outdoor measurements where the temperature changes significantly.
【０００２】[0002]
【従来の技術】従来、この種の温度補償ＳＡＷ（Ｓｕｒ
ｆａｃｅ Ａｃｃｏｕｓｔｉｃ Ｗａｖｅ，弾性表面
波）発振器は、ＳＡＷ共振子と直列に接続した電圧制御
可変容量ダイオードにサーミスタと抵抗回路網から電圧
を供給し、温度変化に対応してＳＡＷ共振子の負荷容量
を変化させ、周波数の温度依存性を補償する方式となっ
ていた。2. Description of the Related Art Conventionally, this type of temperature compensation SAW (Sur
A face acoustic wave (surface acoustic wave) oscillator supplies voltage from a thermistor and a resistor network to a voltage controlled variable capacitance diode connected in series with a SAW resonator to change the load capacitance of the SAW resonator in response to temperature changes. Then, the temperature dependency of the frequency is compensated.
【０００３】[0003]
【発明が解決しようとする課題】上述した従来の温度補
償型ＳＡＷ発振器は、共振子と温度センサが離れて配置
していることと、温度センサ自体に熱時定数があるた
め、急激な温度変化がある場合には、共振子自身の温度
と温度センサの示す温度とが一致せず、温度変化による
周波数変動を抑圧するのに必要な発振器の制御電圧を正
確に設定できず、このため急激な温度変化による出力周
波数の変動を抑圧することができないという欠点があ
る。In the conventional temperature-compensated SAW oscillator described above, since the resonator and the temperature sensor are arranged apart from each other and the temperature sensor itself has a thermal time constant, a rapid temperature change occurs. If there is, the temperature of the resonator itself does not match the temperature indicated by the temperature sensor, and the control voltage of the oscillator necessary to suppress the frequency fluctuation due to temperature change cannot be set accurately, which causes a sudden There is a drawback that the fluctuation of the output frequency due to the temperature change cannot be suppressed.
【０００４】本発明の目的は上述した欠点除去し、急激
な温度変化による出力周波数の変動を抑圧することがで
きる温度補償型ＳＡＷ発振器を提供することにある。An object of the present invention is to eliminate the above-mentioned drawbacks and to provide a temperature-compensated SAW oscillator capable of suppressing fluctuations in output frequency due to abrupt temperature changes.
【０００５】[0005]
【課題を解決するための手段】本発明の温度補償ＳＡＷ
発振器は、共振型ＳＡＷ発振器の内蔵するＳＡＷ共振子
の２つの反射器の間に設ける励振用トランスジューサと
ともに、前記ＳＡＷ共振子の温度を検知する温度検出用
トランスジューサを配設し、この温度検出用トランスジ
ューサで検知した前記ＳＡＷ共振子の温度変化に対応す
る出力周波数の変動を抑圧する手段を備えて構成され
る。The temperature-compensated SAW of the present invention
The oscillator is provided with an excitation transducer provided between two reflectors of a SAW resonator incorporated in the resonance type SAW oscillator, and a temperature detection transducer for detecting the temperature of the SAW resonator. And a means for suppressing the fluctuation of the output frequency corresponding to the temperature change of the SAW resonator detected in the above step.
【０００６】[0006]
【実施例】次に、図面を参照して本発明を説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described with reference to the drawings.
【０００７】図１は、本発明の一実施例の温度補償型Ｓ
ＡＷ発振器のブロック図である。図１に示す実施例は、
共振器型ＳＡＷ発振器１１と、共振型ＳＡＷ発振器１１
の共振周波数を周波数対応の温度表示電圧に変換する周
波数−電圧変換回路１２と、温度表示電圧にもとづいて
共振器型ＳＡＷ発振器１１の出力周波数の温度変化を抑
圧する制御電圧を発生する温度補償回路１３とを備えて
成る。FIG. 1 shows a temperature compensation type S according to an embodiment of the present invention.
It is a block diagram of an AW oscillator. The embodiment shown in FIG.
Resonator type SAW oscillator 11 and resonance type SAW oscillator 11
Frequency-voltage conversion circuit 12 for converting the resonance frequency of the resonator into a temperature display voltage corresponding to the frequency, and a temperature compensation circuit for generating a control voltage for suppressing the temperature change of the output frequency of the resonator type SAW oscillator 11 based on the temperature display voltage. 13 and 13.
【０００８】図２は、図１の共振型ＳＡＷ発振器１１の
内蔵するＳＡＷ共振子の構成を示す平面図である。FIG. 2 is a plan view showing the structure of the SAW resonator incorporated in the resonance type SAW oscillator 11 of FIG.
【０００９】図２に示すＳＡＷ共振子１は、共振用トラ
ンスジューサ２と、励振用トランスジューサ２に併設し
た温度検出用トランスジューサ３と、２つの反射器４と
を備えて成る。The SAW resonator 1 shown in FIG. 2 is provided with a resonance transducer 2, a temperature detection transducer 3 provided side by side with the excitation transducer 2, and two reflectors 4.
【００１０】次に、本実施例の動作について説明する。Next, the operation of this embodiment will be described.
【００１１】図２に示すＳＡＷ共振子１上で励振用トラ
ンスジューサがＳＡＷを発生し、両側に配設した１対の
反射器４によりＳＡＷが反射を繰返し定在波となる。The excitation transducer produces SAW on the SAW resonator 1 shown in FIG. 2, and the SAW is repeatedly reflected by the pair of reflectors 4 arranged on both sides to become a standing wave.
【００１２】共振器型ＳＡＷ発振器１は、前述した定在
波を温度検出用トランスジューサ３で捉え、ＳＡＷ共振
子１の温度に依存して変動する共振周波数として周波数
−電圧変換回路１２に出力するとともに、出力周波数と
して出力する。In the resonator type SAW oscillator 1, the standing wave described above is captured by the temperature detecting transducer 3 and is output to the frequency-voltage conversion circuit 12 as a resonance frequency that fluctuates depending on the temperature of the SAW resonator 1. , Output as output frequency.
【００１３】周波数−電圧変換回路１２は、入力する共
振周波数を電圧変換し、ＳＡＷ共振子１の温度を表現す
る温度表示電圧として温度補償回路１３に供給する。The frequency-voltage converting circuit 12 converts the input resonance frequency into a voltage and supplies it to the temperature compensating circuit 13 as a temperature display voltage expressing the temperature of the SAW resonator 1.
【００１４】温度補償回路１３は、温度表示電圧を受け
ると、この電圧の示す温度に対応する共振周波数の変動
を抑圧する制御電圧を発生し、この制御電圧を共振器型
ＳＡＷ発振器１１の可変容量ダイオードに印加すること
により、共振周波数の温度変動を抑圧する温度補償が行
なわれる。When the temperature compensating circuit 13 receives the temperature display voltage, it generates a control voltage for suppressing the fluctuation of the resonance frequency corresponding to the temperature indicated by this voltage, and this control voltage is used for the variable capacitance of the resonator type SAW oscillator 11. By applying it to the diode, temperature compensation for suppressing temperature fluctuation of the resonance frequency is performed.
【００１５】こうして、急激な温度変化に対しても、共
振周波数の変動を抑圧する温度補償が確保される。In this way, temperature compensation for suppressing fluctuations in the resonance frequency is ensured even with sudden temperature changes.
【００１６】[0016]
【発明の効果】以上説明したように本発明は、共振器型
ＳＡＷ発振器内のＳＡＷ共振子上の２つの反射器間に温
度検出用トランスジューサを設け、共振子の温度を正確
に検知して共振周波数の変動を抑圧する制御電圧を発生
することにより、急激な温度変動による発振器の出力周
波数変動を補償することができる効果がある。As described above, according to the present invention, a temperature detecting transducer is provided between two reflectors on a SAW resonator in a resonator type SAW oscillator, and the temperature of the resonator is accurately detected to cause resonance. By generating the control voltage that suppresses the frequency fluctuation, it is possible to compensate for the output frequency fluctuation of the oscillator due to the rapid temperature fluctuation.
【図１】本発明の一実施例の温度補償ＳＡＷ発振器のブ
ロック図である。FIG. 1 is a block diagram of a temperature-compensated SAW oscillator according to an embodiment of the present invention.
【図２】図１の共振器型ＳＡＷ発振器におけるＳＡＷ共
振子の構成を示す平面図である。FIG. 2 is a plan view showing a configuration of a SAW resonator in the resonator type SAW oscillator shown in FIG.
１ ＳＡＷ共振子 ２ 励振用トランスジューサ ３ 温度検出用トランスジューサ ４ 反射器 １１ 共振器型ＳＡＷ発振器 １２ 周波数−電圧変換回路 １３ 温度補償回路 1 SAW resonator 2 Transducer for excitation 3 Transducer for temperature detection 4 Reflector 11 Resonator type SAW oscillator 12 Frequency-voltage conversion circuit 13 Temperature compensation circuit
Claims (1)
振子の２つの反射器の間に設ける励振用トランスジュー
サとともに、前記ＳＡＷ共振子の温度を検知する温度検
出用トランスジューサを配設し、この温度検出用トラン
スジューサで検知した前記ＳＡＷ共振子の温度変化に対
応する出力周波数の変動を抑圧する手段を備えて成るこ
とを特徴とする温度補償ＳＡＷ発振器。1. A temperature detecting transducer for detecting a temperature of the SAW resonator is provided together with an exciting transducer provided between two reflectors of a SAW resonator incorporated in a resonance type SAW oscillator. Temperature-compensated SAW oscillator, comprising means for suppressing a variation in output frequency corresponding to a temperature variation of the SAW resonator detected by a transducer for use in the SAW resonator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1964992A JPH05283934A (en) | 1992-02-05 | 1992-02-05 | Temperature compensation saw oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1964992A JPH05283934A (en) | 1992-02-05 | 1992-02-05 | Temperature compensation saw oscillator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05283934A true JPH05283934A (en) | 1993-10-29 |
Family
ID=12005093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1964992A Withdrawn JPH05283934A (en) | 1992-02-05 | 1992-02-05 | Temperature compensation saw oscillator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05283934A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015228551A (en) * | 2014-05-30 | 2015-12-17 | 新日本無線株式会社 | Surface acoustic wave oscillator |
-
1992
- 1992-02-05 JP JP1964992A patent/JPH05283934A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015228551A (en) * | 2014-05-30 | 2015-12-17 | 新日本無線株式会社 | Surface acoustic wave oscillator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19990518 |