JPH0292220U - - Google Patents
Info
- Publication number
- JPH0292220U JPH0292220U JP98289U JP98289U JPH0292220U JP H0292220 U JPH0292220 U JP H0292220U JP 98289 U JP98289 U JP 98289U JP 98289 U JP98289 U JP 98289U JP H0292220 U JPH0292220 U JP H0292220U
- Authority
- JP
- Japan
- Prior art keywords
- constant temperature
- temperature oven
- crystal oscillator
- output
- divider
- 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
- 239000013078 crystal Substances 0.000 claims description 6
- 230000001934 delay Effects 0.000 claims 1
- 230000003111 delayed effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Landscapes
- Oscillators With Electromechanical Resonators (AREA)
Description
第1図はこの考案の一実施例を示す構成図、第
2図は従来の恒温槽制御型水晶発振器の構成図、
第3図は水晶発振器1の周波数/温度特性を示す
図、第4図は周波数比較回路4に設定されたフロ
ーチヤート、第5図は、この発明による発振周波
数の温度による変化を示す図である。
図中、1は水晶発振器、2は恒温槽、3は恒温
槽制御回路、4は周波数比較回路、5は遅延回路
、6は周波数分配記器、7は出力端子、8は温度
検出回路である。なお、図中、同一あるいは相当
部分には同一符号を付して示してある。
Fig. 1 is a block diagram showing an embodiment of this invention, Fig. 2 is a block diagram of a conventional thermostat-controlled crystal oscillator,
FIG. 3 is a diagram showing the frequency/temperature characteristics of the crystal oscillator 1, FIG. 4 is a flowchart set in the frequency comparison circuit 4, and FIG. 5 is a diagram showing the change in oscillation frequency due to temperature according to the present invention. . In the figure, 1 is a crystal oscillator, 2 is a constant temperature oven, 3 is a constant temperature oven control circuit, 4 is a frequency comparison circuit, 5 is a delay circuit, 6 is a frequency distribution register, 7 is an output terminal, and 8 is a temperature detection circuit. . In the drawings, the same or corresponding parts are designated by the same reference numerals.
Claims (1)
を分配する周波数分配器と、前記分配器から分配
された信号を遅延させる遅延回路と、前記分配器
の分配出力と前記遅延回路の遅延出力との周波数
比較を行う周波数比較回路と、前記周波数比較回
路の出力により恒温槽を制御する恒温槽制御回路
と、前記恒温槽制御回路にて制御され水晶発振器
の温度を安定化する恒温槽とを備えたことを特徴
とする恒温槽制御型水晶発振器。 a crystal oscillator that outputs a signal; a frequency divider that distributes the output signal; a delay circuit that delays the signal distributed from the divider; and a distribution output of the divider and a delayed output of the delay circuit. A frequency comparison circuit that performs frequency comparison, a constant temperature oven control circuit that controls a constant temperature oven using the output of the frequency comparison circuit, and a constant temperature oven that is controlled by the constant temperature oven control circuit and stabilizes the temperature of the crystal oscillator. A constant temperature oven controlled crystal oscillator.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP98289U JPH0292220U (en) | 1989-01-09 | 1989-01-09 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP98289U JPH0292220U (en) | 1989-01-09 | 1989-01-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0292220U true JPH0292220U (en) | 1990-07-23 |
Family
ID=31200476
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP98289U Pending JPH0292220U (en) | 1989-01-09 | 1989-01-09 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0292220U (en) |
-
1989
- 1989-01-09 JP JP98289U patent/JPH0292220U/ja active Pending
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