JPH0441606Y2 - - Google Patents
Info
- Publication number
- JPH0441606Y2 JPH0441606Y2 JP1987049332U JP4933287U JPH0441606Y2 JP H0441606 Y2 JPH0441606 Y2 JP H0441606Y2 JP 1987049332 U JP1987049332 U JP 1987049332U JP 4933287 U JP4933287 U JP 4933287U JP H0441606 Y2 JPH0441606 Y2 JP H0441606Y2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- circuit
- capacitor
- compensated
- temperature compensation
- 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.)
- Expired
Links
- 239000013078 crystal Substances 0.000 claims description 22
- 239000003990 capacitor Substances 0.000 claims description 18
- 238000012888 cubic function Methods 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 1
Description
【考案の詳細な説明】
＜本考案の目的＞
［産業上の利用分野］
本考案は、直接補償型の温度補償水晶発振回路
に関する。[Detailed Description of the Invention] <Object of the Invention> [Industrial Application Field] The present invention relates to a direct compensation type temperature compensated crystal oscillation circuit.
［従来の技術］
従来より水晶振動子を発振源として温度補償水
晶発振回路が広く使われている。温度補償には、
サーミスタ等感温素子を用いて温度補償電圧をつ
くり、水晶振動子に直列に接続した可変容量ダイ
オードに加えて補償する間接型温度補償回路と、
水晶振動子に直列に感温素子とコンデンサを並列
に接続した直接型温度補償回路がある。[Prior Art] Temperature-compensated crystal oscillation circuits using a crystal resonator as an oscillation source have been widely used. For temperature compensation,
An indirect temperature compensation circuit that creates a temperature compensation voltage using a temperature sensing element such as a thermistor, and compensates it by adding it to a variable capacitance diode connected in series to a crystal resonator.
There is a direct temperature compensation circuit in which a temperature sensing element and a capacitor are connected in parallel to a crystal resonator in series.
第３図は、従来の直接補償型水晶発振回路であ
る。高温補償回路Ａと低温補償回路Ｂによつて補
償されるが、サーミスタとコンデンサを組み合わ
せた回路であり、水晶振動子１と直列に入るリア
クタンスが温度によつて変化するのを利用するこ
とにより温度補償している。しかし高温側と低温
側にそれぞれサーミスタとコンデンサの組み合わ
せによる温度補償回路が使用され、それぞれに調
整の手間がかかる。そこで調整を簡易化した温度
補償回路が求められていた。 FIG. 3 shows a conventional direct compensation type crystal oscillation circuit. The temperature is compensated by the high temperature compensation circuit A and the low temperature compensation circuit B, which are circuits that combine a thermistor and a capacitor. Compensated. However, temperature compensation circuits consisting of a combination of a thermistor and a capacitor are used on the high-temperature side and the low-temperature side, and each requires time and effort to adjust. Therefore, there has been a need for a temperature compensation circuit that can simplify adjustment.
［考案が解決しようとする問題点］
そこで、低温補償回路を簡素化し、調整し易く
することを考える。[Problems to be solved by the invention] Therefore, we will consider simplifying the low temperature compensation circuit and making it easier to adjust.
［本考案の目的］
本考案は、直接補償型の温度補償回路で低温補
償を簡素化した温度補償する発振回路を提供する
ことを目的としている。[Objective of the Present Invention] An object of the present invention is to provide a temperature compensated oscillation circuit that simplifies low temperature compensation using a direct compensation type temperature compensation circuit.
＜本考案の構成＞
［問題を解決する手段］
そこで本考案では３次関数の温度特性を有する
水晶振動子と直列に温度補償回路を接続して成る
温度補償水晶発振回路において、該温度補償回路
は低温側を補償する負の１次の温度係数を持つ温
度補償用コンデンサと、高温側を補償する感温素
子とコンデンサが並列に接続された温度補償回路
を直列に接続したことにより解決している。<Structure of the present invention> [Means for solving the problem] Therefore, in the present invention, in a temperature compensated crystal oscillator circuit which is formed by connecting a temperature compensation circuit in series with a crystal resonator having temperature characteristics of a cubic function, the temperature compensation circuit is This can be solved by connecting in series a temperature compensation capacitor with a negative first-order temperature coefficient that compensates for the low temperature side, and a temperature compensation circuit in which a temperature sensing element and a capacitor are connected in parallel to compensate for the high temperature side. There is.
［作用及び実施例］
第１図は、本考案の実施例を示す回路図であ
る。発振回路１０には水晶振動子１と温度補償回
路２が直列に接続されている。温度補償回路の構
成は、低温側補償用コンデンサ３と高温補償回路
４とから成り、高温補償回路４は、サーミスタ５
とコンデンサ６とから成つている。コンデンサ９
は周波数調整用コンデンサである。[Operation and Examples] FIG. 1 is a circuit diagram showing an example of the present invention. A crystal resonator 1 and a temperature compensation circuit 2 are connected in series to the oscillation circuit 10. The configuration of the temperature compensation circuit consists of a low temperature compensation capacitor 3 and a high temperature compensation circuit 4. The high temperature compensation circuit 4 includes a thermistor 5.
and a capacitor 6. capacitor 9
is a frequency adjustment capacitor.
動作としては、低温側補償のコンデンサ３には
負の一次の温度係数を持つ、温度補償用コンデン
サであり、すなわち温度が上昇すると静電容量が
減少し、周波数が高くなる。これによつて三次関
数を持つATカツトの水晶振動子の特性の傾きを
変えている。水晶振動子の特性は予め常温以下で
持上がつた周波数特性のものを用い、高温側でも
特に高い温度範囲での周波数傾斜が大きくなるた
め、この高い温度における範囲を補償するためサ
ーミスタとコンデンサで補償回路をつくり補償す
る。サーミスタは、負の温度係数を持ち、高温側
でコンデンサ６の見掛け上の容量が大きくなる様
に働くことにより、周波数を降下させる。これで
高温側の温度特性を補償することが出来る。 In operation, the low temperature side compensation capacitor 3 is a temperature compensation capacitor having a negative first-order temperature coefficient, that is, as the temperature rises, the capacitance decreases and the frequency increases. This changes the slope of the characteristics of the AT-cut crystal resonator, which has a cubic function. The characteristics of the crystal oscillator are those that have frequency characteristics that are lifted at room temperature or below, and since the frequency slope becomes particularly large in the high temperature range, a thermistor and capacitor are used to compensate for the range in this high temperature range. Create a compensation circuit to compensate. The thermistor has a negative temperature coefficient and works so that the apparent capacitance of the capacitor 6 increases on the high temperature side, thereby lowering the frequency. This makes it possible to compensate for the temperature characteristics on the high temperature side.
このようにサーミスタとコンデンサの組み合わ
せによつて水晶振動子に直列に入るリアクタンス
が温度によつて変化する。 In this way, due to the combination of the thermistor and capacitor, the reactance that enters the crystal resonator in series changes depending on the temperature.
第２図は、水晶振動子単体と本考案の水晶発振
回路の周波数温度特性を示すグラフであり、破線
が水晶振動子単体の周波数温度特性を示し、実線
が本考案の温度補償回路による周波数温度特性で
ある。 Figure 2 is a graph showing the frequency-temperature characteristics of a single crystal resonator and the crystal oscillation circuit of the present invention. It is a characteristic.
＜本考案の効果＞
本考案によつて、従来の温度補償回路に比べ簡
素化した回路となり小型化と低価格化が実現出来
た。また調整も容易になつた。<Effects of the present invention> The present invention makes it possible to realize a circuit that is simpler than conventional temperature compensation circuits, resulting in smaller size and lower cost. Adjustment is also easier.
第１図は、本考案の温度補償水晶発振回路を示
す回路図、第２図は水晶振動子単体と本考案の水
晶発振回路の周波数温度特性図、第３図は従来の
温度補償水晶発振回路である。
１……水晶振動子、３……温度補償用コンデン
サ、５……感温素子、６……コンデンサ。
Figure 1 is a circuit diagram showing the temperature-compensated crystal oscillation circuit of the present invention, Figure 2 is a frequency-temperature characteristic diagram of the crystal oscillator alone and the crystal oscillation circuit of the present invention, and Figure 3 is a conventional temperature-compensated crystal oscillation circuit. It is. 1... Crystal resonator, 3... Temperature compensation capacitor, 5... Temperature sensing element, 6... Capacitor.
Claims (1)
に温度補償回路を接続して成る温度補償水晶発振
回路において、該温度補償回路は低温側を補償す
る負の１次の温度係数を持つ温度補償用コンデン
サと、高温側を補償する感温素子とコンデンサが
並列に接続された温度補償回路を直列に接続した
ことを特徴とする温度補償水晶発振回路。 In a temperature-compensated crystal oscillator circuit comprising a temperature compensation circuit connected in series with a crystal resonator having temperature characteristics of a cubic function, the temperature compensation circuit has a temperature compensation circuit having a negative first-order temperature coefficient to compensate for the low temperature side. A temperature-compensated crystal oscillator circuit, characterized in that a temperature-compensated circuit is connected in series with a temperature-sensitive capacitor and a temperature-compensated circuit in which a temperature-sensitive element and a capacitor are connected in parallel to compensate for the high-temperature side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987049332U JPH0441606Y2 (en) | 1987-03-31 | 1987-03-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987049332U JPH0441606Y2 (en) | 1987-03-31 | 1987-03-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63156110U JPS63156110U (en) | 1988-10-13 |
| JPH0441606Y2 true JPH0441606Y2 (en) | 1992-09-30 |
Family
ID=30871685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987049332U Expired JPH0441606Y2 (en) | 1987-03-31 | 1987-03-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0441606Y2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5138278U (en) * | 1974-09-14 | 1976-03-22 | ||
| JPS5668002A (en) * | 1979-11-06 | 1981-06-08 | Toyo Commun Equip Co Ltd | Quartz oscillator of temperature compensation type |
| JPS59139708A (en) * | 1983-01-27 | 1984-08-10 | Fujitsu Ltd | Piezoelectric oscillator |
-
1987
- 1987-03-31 JP JP1987049332U patent/JPH0441606Y2/ja not_active Expired
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5138278U (en) * | 1974-09-14 | 1976-03-22 | ||
| JPS5668002A (en) * | 1979-11-06 | 1981-06-08 | Toyo Commun Equip Co Ltd | Quartz oscillator of temperature compensation type |
| JPS59139708A (en) * | 1983-01-27 | 1984-08-10 | Fujitsu Ltd | Piezoelectric oscillator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63156110U (en) | 1988-10-13 |
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