JPS62194739A - Voltage controlled oscillator - Google Patents
Voltage controlled oscillatorInfo
- Publication number
- JPS62194739A JPS62194739A JP61037031A JP3703186A JPS62194739A JP S62194739 A JPS62194739 A JP S62194739A JP 61037031 A JP61037031 A JP 61037031A JP 3703186 A JP3703186 A JP 3703186A JP S62194739 A JPS62194739 A JP S62194739A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- frequency
- controlled oscillator
- oscillation frequency
- output signal
- 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
- 230000010355 oscillation Effects 0.000 claims abstract description 21
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、入力端子により発振周波数を制御する電圧制
御発振器に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a voltage controlled oscillator whose oscillation frequency is controlled by an input terminal.
従来、この種の電圧制御発振器としてはシュミットトリ
ガを用いたもの、オペアンプを用いたもの、結合形マル
チバイブレータを用いたもの等がある。Conventionally, this type of voltage controlled oscillator includes one using a Schmitt trigger, one using an operational amplifier, and one using a coupled multivibrator.
上述した従来の電圧制御発振器は、温度変動等に対して
周波数安定性が悪いという欠点がある。The conventional voltage controlled oscillator described above has a drawback of poor frequency stability against temperature fluctuations and the like.
Ｃ問題点を解決するための手段〕
本発明の電圧制御発振器は、該電圧制御発振器の発振周
波数を電圧に変換する周波数／電圧変換器と、発振周波
数制御電圧と発振周波数の関係が常に一定になるように
周波数／電圧変換器の出力電圧により発振周波数制御電
圧を制御する電圧比較器を備えたことを特徴とする。Means for Solving Problem C] The voltage controlled oscillator of the present invention includes a frequency/voltage converter that converts the oscillation frequency of the voltage controlled oscillator into a voltage, and a frequency/voltage converter that maintains a constant relationship between the oscillation frequency control voltage and the oscillation frequency. The present invention is characterized in that it includes a voltage comparator that controls the oscillation frequency control voltage according to the output voltage of the frequency/voltage converter.
したがって、電圧ｆν制御発振器の発振周波数の温度等
に対する変動を小さくできる。Therefore, fluctuations in the oscillation frequency of the voltage fν controlled oscillator due to temperature, etc. can be reduced.
（実施例〕
次に、本発明の実施例について図面を参照して説明する
。(Example) Next, an example of the present invention will be described with reference to the drawings.
第１図は本発明の電圧制御発振器の一実施例を示す構成
図である。FIG. 1 is a block diagram showing an embodiment of the voltage controlled oscillator of the present invention.
本実施例は、従来の電圧制御発振？：Ｆ５に、電圧制御
発振器５の出力信号６の発振周波数を電圧に変換する周
波数／電圧変換器７と、人力制御１８号１（発振周波数
制御電圧）と発振周波数の関係が常に一定になるように
周波数／Ｔｉ圧変換器７の出力信号３により人力制御信
号ｌを制御して出力信号４として電圧制御発振器５に出
力する電圧比較器２を付加して構成されている。Is this example a conventional voltage controlled oscillation? :F5 is equipped with a frequency/voltage converter 7 that converts the oscillation frequency of the output signal 6 of the voltage controlled oscillator 5 into a voltage, and a frequency/voltage converter 7 that converts the oscillation frequency of the output signal 6 of the voltage controlled oscillator 5 into a voltage, so that the relationship between the human control 18 No. 1 (oscillation frequency control voltage) and the oscillation frequency is always constant. In addition, a voltage comparator 2 is added which controls the human control signal 1 using the output signal 3 of the frequency/Ti pressure converter 7 and outputs it as an output signal 4 to the voltage controlled oscillator 5.
温度等の変動により電圧制御発掘器５の出力信号６の周
波数が、人力の制御信号４が変動しないにもかかわらず
変動した場合、周波数／電圧変換器７の人力周波数が変
化するため、周波数／電圧変換器７の出力信号３の電圧
が変化する。出力信号３の電圧が変化することにより電
圧比較器２の出力信号４の電圧が変化する。この変化が
電圧制御発振器５の発振周波数を変動前のものにする分
だけ変化する、つまり電圧制御発振器５の周波数変動を
補正するように電圧比較器２の出力信号４が変化するの
で、人力制御信号１と出力信号６の関係は、温度等の変
動に左右されずに一定に保たれ、高安定な電圧制御発振
器を実現することができる。If the frequency of the output signal 6 of the voltage control excavator 5 fluctuates due to fluctuations in temperature etc. even though the human-powered control signal 4 does not fluctuate, the human-powered frequency of the frequency/voltage converter 7 changes. The voltage of the output signal 3 of the voltage converter 7 changes. As the voltage of the output signal 3 changes, the voltage of the output signal 4 of the voltage comparator 2 changes. This change changes the oscillation frequency of the voltage controlled oscillator 5 to the value before the change, that is, the output signal 4 of the voltage comparator 2 changes so as to correct the frequency fluctuation of the voltage controlled oscillator 5, so the manual control The relationship between the signal 1 and the output signal 6 is kept constant regardless of changes in temperature, etc., making it possible to realize a highly stable voltage controlled oscillator.
（発明の効果）
以上説明したように本発明は、電圧制御発振器のも７て
いる温度等に対する周波数ドリフトを、周波数／電圧変
換器および電圧比較器により電圧制御発振器の入力制御
電圧を制御し、打ち消すことにより１周波数の７．２度
等に対する変動を小さくできる効果がある。(Effects of the Invention) As explained above, the present invention controls the input control voltage of the voltage controlled oscillator by using a frequency/voltage converter and a voltage comparator to reduce the frequency drift of the voltage controlled oscillator due to temperature, etc. This cancellation has the effect of reducing fluctuations of one frequency, such as 7.2 degrees.
、 第１図は本発明の電圧制御発振器の一実施例の構成
図である。
１−−−−−・入力制御信号、
２−−−−−−電圧比較器、
３−−−−−−周波数／電圧変換器７の出力信号、４−
−−−−電圧比較器２の出力信号、５−−−−−・電圧
制御発振器、
６−−−−−・出カイ８号、
７・・・・・・周波数／電圧変換器。, FIG. 1 is a block diagram of an embodiment of the voltage controlled oscillator of the present invention. 1-----Input control signal, 2-----Voltage comparator, 3-----Output signal of frequency/voltage converter 7, 4-
---- Output signal of voltage comparator 2, 5----Voltage controlled oscillator, 6------- Output No. 8, 7... Frequency/voltage converter.
Claims (1)
数を電圧に変換する周波数／電圧変換器と、発振周波数
制御電圧と発振周波数の関係が常に一定になるように周
波数／電圧変換器の出力電圧により発振周波数制御電圧
を制御する電圧比較器を備えたことを特徴とする電圧制
御発振器。In a voltage controlled oscillator, there is a frequency/voltage converter that converts the oscillation frequency of the voltage controlled oscillator into a voltage, and an output voltage of the frequency/voltage converter to oscillate so that the relationship between the oscillation frequency control voltage and the oscillation frequency is always constant. A voltage controlled oscillator characterized by comprising a voltage comparator that controls a frequency control voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61037031A JPS62194739A (en) | 1986-02-20 | 1986-02-20 | Voltage controlled oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61037031A JPS62194739A (en) | 1986-02-20 | 1986-02-20 | Voltage controlled oscillator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62194739A true JPS62194739A (en) | 1987-08-27 |
Family
ID=12486265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61037031A Pending JPS62194739A (en) | 1986-02-20 | 1986-02-20 | Voltage controlled oscillator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62194739A (en) |
-
1986
- 1986-02-20 JP JP61037031A patent/JPS62194739A/en active Pending
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