JPH0336822A - Standard frequency oscillator - Google Patents
Standard frequency oscillatorInfo
- Publication number
- JPH0336822A JPH0336822A JP1171086A JP17108689A JPH0336822A JP H0336822 A JPH0336822 A JP H0336822A JP 1171086 A JP1171086 A JP 1171086A JP 17108689 A JP17108689 A JP 17108689A JP H0336822 A JPH0336822 A JP H0336822A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- output
- crystal oscillator
- signal
- receiver
- 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 abstract description 18
- 230000010355 oscillation Effects 0.000 claims description 11
- 238000009499 grossing Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 229910052792 caesium Inorganic materials 0.000 description 1
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052701 rubidium Inorganic materials 0.000 description 1
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Superheterodyne Receivers (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は標準周波数を発振する標準周波数発振装置に
関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a standard frequency oscillation device that oscillates a standard frequency.
［従来の技術］
従来、周波数精度の高い標準周波数を生成するためには
、セシウム、ルビジューム等の原子時計に対して校正し
た水晶発振器が用いられていた。[Prior Art] Conventionally, in order to generate a standard frequency with high frequency accuracy, a crystal oscillator calibrated with respect to an atomic clock such as cesium or rubidium has been used.
然しながら原子時計そのものにも周波数誤差があり、こ
の周波数誤差を除去するための制御は困難で、この周波
数誤差をできるだけ小さく保つためには、環境条件の厳
密な管理を必要とし、装置が大型化するとともに、高価
となり、取り扱いが面倒になるという問題があった。However, the atomic clock itself has a frequency error, and control to remove this frequency error is difficult, and in order to keep this frequency error as small as possible, strict control of environmental conditions is required, which requires an increase in the size of the device. In addition, there were problems in that it was expensive and difficult to handle.
更に原子時計の周波数はその原子に固有な値に固定され
ているので、この周波数を基にして一般用の周波数シン
セサイザを構成することは困難であるという問題があっ
た。Furthermore, since the frequency of an atomic clock is fixed to a value unique to that atom, there is a problem in that it is difficult to construct a general-purpose frequency synthesizer based on this frequency.
［発明が解決しようとする課題］
この発明は従来のものにおける上述の課題を解決するた
めになされたもので、高い周波数精度を有し、且つ取り
扱いが簡便な標準周波数発振装置を得ることを目的とし
ている。[Problems to be Solved by the Invention] This invention was made to solve the above-mentioned problems in the conventional ones, and its purpose is to obtain a standard frequency oscillation device that has high frequency accuracy and is easy to handle. It is said that
［課題を解決するための手段］
この発明にかかる種型周波数発振装置は、標準電波の放
送を受信し、この標準電波により水晶発振器の発振周波
数を同期させ、この水晶発振器の発振周波数を基にして
周波数シンセサイザを構成することとしたものである。[Means for Solving the Problems] A seed frequency oscillator according to the present invention receives broadcasting of standard radio waves, synchronizes the oscillation frequency of a crystal oscillator with the standard radio waves, and synchronizes the oscillation frequency of the crystal oscillator with the oscillation frequency of the crystal oscillator. A frequency synthesizer is constructed using the following.
［作用］
ＪＧ２ＡＳのコールサインで放送されている長波の標準
電波は、その周波数精度が１０−１°程度であり、且つ
その搬送波周波数が４０ｋＨｚであるので、これを基に
して１ ｋＨｚステップ、１０ｋＨｚステツプ、１００
ｋＨｚステツプ等で周波数を容易に合成することが可能
となる。[Function] The long wave standard radio wave broadcast with the call sign JG2AS has a frequency accuracy of about 10-1° and a carrier frequency of 40 kHz, so based on this, the frequency is set in 1 kHz steps and 10 kHz. step, 100
It becomes possible to easily synthesize frequencies using kHz steps or the like.
［実施例コ
以下、この発明の実施例を図面を用いて説明する。第１
図はこの発明の一実施例を模式的に示すブロック図であ
って、図において（１）はアンテナで、長波受信のため
多くの場合ループアンブナが用いられている。（２）は
受信機、（３）は第１の位相比較器、（４）はローパス
フィルタ、（５）は水晶発振器、（６）は第１の分周器
、（７）は第２の分周器、（８）はＶＣＯ＜電圧制御発
振器）、くっ）は第３の分周器、（１０）は第２の位相
比較器、（１１）はローパスフィルタ、（１２）は出力
端子を示す。[Embodiments] Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1st
The figure is a block diagram schematically showing an embodiment of the present invention. In the figure, (1) is an antenna, and a loop antenna is often used for long wave reception. (2) is the receiver, (3) is the first phase comparator, (4) is the low-pass filter, (5) is the crystal oscillator, (6) is the first frequency divider, (7) is the second Frequency divider, (8) is VCO < voltage controlled oscillator), (10) is the third frequency divider, (11) is the low pass filter, (12) is the output terminal. show.
受信機（２〉でＪＧ２ＡＳを受信して、周波数精度の良
い４０ｋＨｚの信号を出力する。水晶発振器（５）の発
振周波数を例えば１２８０ ｋ Ｈｚとし、分周器（６
〉の分周比を１／３２とすれば、分周器（６〉の出力は
４０ｋＨｚとなるが、この４０ ｋ Ｈ２を、第１の位
相比較器（３）−ローパスフィルタ（４〉−水晶発振器
（５）で構成されるフィードバックループにより、受信
機（２）の出力の４０ ｋ Ｈｚに位相同期すれば、水
晶発振器（５）の出力周波数は１Ｏ−ｔｏ程度の高精度
なものとなる。The receiver (2>) receives JG2AS and outputs a 40kHz signal with good frequency accuracy.The oscillation frequency of the crystal oscillator (5) is set to, for example, 1280 kHz, and the frequency divider (6)
If the frequency division ratio of If the phase is synchronized to the 40 kHz output of the receiver (2) by the feedback loop formed by the oscillator (5), the output frequency of the crystal oscillator (5) will be highly accurate to about 10-to.
この高精度な水晶発振周波数から、周波数シンセサイザ
を経て出力端子（１２）に所望の周波数の高精度な周波
数信号を出力することができる。From this highly accurate crystal oscillation frequency, a highly accurate frequency signal of a desired frequency can be outputted to the output terminal (12) via a frequency synthesizer.
水晶発振器（５）の出力周波数を一般的にｆ、分周器（
７） 、 （９）の分周比を、それぞれ１／Ｌ、１／Ｍ
とすれば、出力周波数はｆＭ／Ｌとなる。Generally speaking, the output frequency of the crystal oscillator (5) is set to f, and the frequency divider (
7) Set the frequency division ratios of (9) to 1/L and 1/M, respectively.
Then, the output frequency becomes fM/L.
ｆ＝１２８０ｋＨｚ Ｌ＝１２８．Ｍ＝１００゜１０
１．１０２． ・・・と変化させることにより、出力
周波数は１０−１０の精度で１０００．１０１０．１０
２０． ・・ −ｋＨｚと変化する。f=1280kHz L=128. M=100°10
1.102. ..., the output frequency becomes 1000.1010.10 with an accuracy of 10-10.
20. ... Varies with -kHz.
以上の説明では便宜のために特定の数値例を挙げて説明
しているが、この発明はこのような数値例に限定されな
いことは申すまでもない。In the above description, specific numerical examples are given for convenience, but it goes without saying that the present invention is not limited to such numerical examples.
またＪＧ２ＡＳが受信できない地点では、短波の標準周
波数放送ＪＪＹを利用することができる。Furthermore, in locations where JG2AS cannot be received, shortwave standard frequency broadcast JJY can be used.
但しこの場合はイオン化層からの反射の影響で周波数精
度が１０−８程度に低下することになる。However, in this case, the frequency accuracy will drop to about 10-8 due to the influence of reflection from the ionization layer.
［発明の効果コ
この発明は以上説明したように、簡単な構成により、取
り扱いが簡便で高精度な標準周波数発振装置を得ること
ができるという効果がある。[Effects of the Invention] As explained above, the present invention has the advantage that it is possible to obtain a standard frequency oscillation device with a simple structure, easy handling, and high precision.
第１図はこの発明の一実施例を示すブロック図。
（２）は受信機、〈３）は第１の位相比較器、（５〉は
水晶発振器、（６〉は第１の分周器、（７〉は第２の分
周器、〈８〉はＶＣＯ５（９）は第３の分周器、（ｌＯ
）は第２の位相比較器。
なお、各図中同一符号は同一または相当部分を示すもの
とする。FIG. 1 is a block diagram showing one embodiment of the present invention. (2) is the receiver, <3) is the first phase comparator, (5> is the crystal oscillator, (6> is the first frequency divider, (7> is the second frequency divider, <8>) is the third frequency divider, (lO
) is the second phase comparator. Note that the same reference numerals in each figure indicate the same or corresponding parts.
Claims (1)
波数と同一周波数の信号を出力する第１の分周器、 この第１の分周器の出力と上記受信器の出力との位相を
比較する第１の位相比較器、 この第１の位相比較器の出力を平滑化して上記水晶発振
器の発振周波数をフィードバック制御する手段、 上記水晶発振器の出力周波数を１／Ｌ（但し、Ｌは任意
に設定できる正の整数）に分周する第２の分周器、 ＶＣＯ（電圧制御発振器）の出力周波数を１／Ｍ（但し
、Ｍは任意に設定できる正の整数）に分周する第３の分
周器、 この第３の分周器の出力と上記第２の分周器の出力との
位相を比較する第２の位相比較器、この第２の位相比較
器の出力を平滑化して上記ＶＣＯの発振周波数をフィー
ドバック制御し、上記水晶発振器の発振周波数のＭ／Ｌ
倍の周波数の信号を出力する手段、 を備えた標準周波数発振装置。[Scope of Claims] A receiver that receives standard radio wave broadcasting, a first frequency divider that divides the output frequency of a crystal oscillator and outputs a signal having the same frequency as the output frequency of the receiver, a first phase comparator for comparing the phases of the output of the frequency divider and the output of the receiver; means for feedback controlling the oscillation frequency of the crystal oscillator by smoothing the output of the first phase comparator; A second frequency divider divides the output frequency of the crystal oscillator to 1/L (where L is a positive integer that can be set arbitrarily), and divides the output frequency of the VCO (voltage controlled oscillator) to 1/M (however, L is a positive integer that can be set arbitrarily). M is a positive integer that can be set arbitrarily); a second phase that compares the phase of the output of this third frequency divider and the output of the second frequency divider; A comparator smoothes the output of this second phase comparator to feedback control the oscillation frequency of the VCO, and calculates M/L of the oscillation frequency of the crystal oscillator.
A standard frequency oscillator comprising means for outputting a signal of double the frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1171086A JPH0336822A (en) | 1989-07-04 | 1989-07-04 | Standard frequency oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1171086A JPH0336822A (en) | 1989-07-04 | 1989-07-04 | Standard frequency oscillator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0336822A true JPH0336822A (en) | 1991-02-18 |
Family
ID=15916742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1171086A Pending JPH0336822A (en) | 1989-07-04 | 1989-07-04 | Standard frequency oscillator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0336822A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011109516A (en) * | 2009-11-19 | 2011-06-02 | Hitachi Kokusai Electric Inc | Wireless communication system |
-
1989
- 1989-07-04 JP JP1171086A patent/JPH0336822A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011109516A (en) * | 2009-11-19 | 2011-06-02 | Hitachi Kokusai Electric Inc | Wireless communication system |
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