JPS5957506A - Sinusoidal wave oscillating circuit - Google Patents
Sinusoidal wave oscillating circuitInfo
- Publication number
- JPS5957506A JPS5957506A JP16763082A JP16763082A JPS5957506A JP S5957506 A JPS5957506 A JP S5957506A JP 16763082 A JP16763082 A JP 16763082A JP 16763082 A JP16763082 A JP 16763082A JP S5957506 A JPS5957506 A JP S5957506A
- Authority
- JP
- Japan
- Prior art keywords
- amplitude
- output
- oscillation
- sine wave
- 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 24
- 230000010356 wave oscillation Effects 0.000 claims description 13
- 238000010586 diagram Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L5/00—Automatic control of voltage, current, or power
Landscapes
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は正弦波発振回路（二関し、特に多重帰還・１ｊ
（・域フィルタ等（１正帰還をかけて発振出力を得る正
弦波発振回路に関する。[Detailed Description of the Invention] The present invention relates to a sine wave oscillation circuit (particularly multiple feedback/1j
(・Relates to a sine wave oscillation circuit that obtains an oscillation output by applying positive feedback, etc.).
従来、この種の正弦波発振回路Ｃ二おいて、例えば発振
出力信号の振幅調整をしたい場合（−は、この発振回路
の後段（−増幅器を接続し、この増幅器の利得調整（二
より行っていたが、この場合には調整手段が発振のため
の正帰還ループ外（二あるので、種々の発振状態（二対
してこの調整手段による調整だけでは出力振幅をダイナ
ミックレンジの最大まで使用することができなかった。Conventionally, when using this type of sine wave oscillation circuit C2, for example, if you want to adjust the amplitude of the oscillation output signal (- means connect an amplifier after this oscillation circuit (-), and adjust the gain of this amplifier (2). However, in this case, since the adjustment means is outside the positive feedback loop for oscillation, it is difficult to use the output amplitude to the maximum of the dynamic range with only adjustment using this adjustment means. could not.
本発明は」ユ記の点（１鑑みてなされたもので、ダイナ
ミックレンジが広く発振出力の振幅９周波数を発振条件
に応じて容易（二変えることができると共（六歪等の少
ない良好な発振出力特性を有する正弦波発振回路を提供
することを目的とし、木グこ明ではこの目的を達成する
ために帯域フィルタの伝達特性Ｃ二基づいて発振を行う
ため（二この・（ｉ）域フィルタに対して形成された正
帰還ループ内（六帯域フィルタの出力信号を方形波（−
変換する手段。The present invention was made in view of the points (1) in "U", and has a wide dynamic range, the amplitude of the oscillation output (9), which can easily change the frequency (2) according to the oscillation conditions, and (6) good performance with less distortion, etc. The purpose is to provide a sine wave oscillation circuit having oscillation output characteristics. In the positive feedback loop formed for the filter (the output signal of the six-band filter is connected to a square wave (-
means to convert.
及びこの変換手段からの方形波信号の振幅を制Ｑｌする
手段を有し、例えば、この振幅制御手段により正弦波出
力の振幅を変化させること（二より、所望の正弦波出力
を得るようにしたことを特徴としている。and means for controlling the amplitude of the square wave signal from this conversion means, for example, by changing the amplitude of the sine wave output by this amplitude control means (secondly, to obtain a desired sine wave output). It is characterized by
以下、本発明の実施例を添伺された図面と共に説明する
。第１図は本発明（１係る正弦波発振回路の基本構成を
示すブロック図である。Embodiments of the present invention will be described below with reference to accompanying drawings. FIG. 1 is a block diagram showing the basic configuration of a sine wave oscillation circuit according to the present invention (1).
１は出力信号（正弦波信号）から方形波信号を作り出す
コンパレータ、２は方形波の振幅を調整する振幅調整回
路、３は方形波の基本波成分（正弦波信号）を取り出す
帯域フィルタであり、この帯域フィルタ３の出力信号は
発振を形成するためにコンパレータ１の入力側（−正帰
還されている。1 is a comparator that generates a square wave signal from the output signal (sine wave signal), 2 is an amplitude adjustment circuit that adjusts the amplitude of the square wave, and 3 is a bandpass filter that extracts the fundamental wave component (sine wave signal) of the square wave. The output signal of the bandpass filter 3 is fed back to the input side (-positive feedback) of the comparator 1 to form oscillation.
第２図は第１図の基本構成（二基づく本発明の一実施例
を示す回路図であり、コンパレータ１は抵Ｒ２の抵抗値
は抵抗Ｒ８の抵抗値より非常（二大きい値（−設定され
ている。Ｊ二た振幅調整回路２は抵抗Ｒ３，可変抵抗Ｖ
Ｒ，，ＶＲ２及び切換えスイツブーＳＩから４’ｒ１１
成されている。またＳ２は発振停止用スイッチである。FIG. 2 is a circuit diagram showing an embodiment of the present invention based on the basic configuration of FIG. The J2 amplitude adjustment circuit 2 includes a resistor R3 and a variable resistor V.
R,,VR2 and switching switch Boo SI to 4'r11
has been completed. Further, S2 is a switch for stopping oscillation.
更（二、前述した帯域フィルタ３は、オペアンプＱ２＋
抵抗Ｒ４−Ｒ６，可変抵抗ＶＲ３，ＶＲイ。Furthermore, the above-mentioned bandpass filter 3 is an operational amplifier Q2+
Resistors R4-R6, variable resistors VR3, VR I.
コンデンサＣ，，Ｃ２で構成される。It consists of capacitors C, , C2.
動作の説明に先だって、本発明（１係る正弦波発振回路
の発振原理について説明する。Before explaining the operation, the oscillation principle of the sine wave oscillation circuit according to the present invention (1) will be explained.
帯域フィルタ３は多重帰還型の例えば２次バンドパスフ
ィルタで構成され例えばスイッチＳ３によって可変抵抗
ｖＲ３を選択している時の伝達関数は次式で表わされる
。The bandpass filter 3 is composed of a multiple feedback type, for example, a second-order bandpass filter, and the transfer function when the variable resistor vR3 is selected by the switch S3, for example, is expressed by the following equation.
ココテ ω。＝１べ／イ厩］ム１七多Ｅ〒＝２冗ｆ。Kokote ω. = 1 be/i stable] mu 17 many E 〒 = 2 f.
α＝（Ｃ１＋０２）１５得し）Ｃ０
、−一ら−、五
ｃ １ ＋ Ｃ２Ｒ１
上記化成フィルタ３巾正帰還をかけて発振させると、伝
達関数の虚数部分が零となり、ω＝ω０すなわち周波数
ｆ。で発振Ｊ−る。また、この時の基Ａく波成分の利得
はＡとなる。前述したよう（二、木実施例の発振回路は
、方形波の信号を帯域ノイルり３を通して正弦波を得て
いるため和が生する。合方形波の電圧なＥ、Ｖ、−、と
し、ノーリュー展開すると、Ｖ １（ｔ） ＝”２
＋ ｎに＝；、 （４） ｚ、％ ｔ ｓｍ （２ｎ
＋ １ ）”１１ ｔ＜ ａ （）−はＤＣ成分）・・
・・・・・・・・・・・・（２）この方形波を−［−記
帯域フィルタ３を通−）と、出力ＶＯ（ｔ＞は
５ｉｎ（（２ｎ＋１）ω。ｔ ＋５’２ｎ＋ １ ）−
・−−・・（３）即ち、基本波成分として；ＡＥ １Ｖ
ｐ−１３の正弦波力１得られ、方形波の電圧Ｅ１を調整
することにより、正弦波の振幅を容易（二調整すること
ができる。また歪率γは
・・・・・・・・・・・・（４）
で表わされ、α＝０１（−すれは約〕チの歪率になり、
歪の少ない正弦波が得られる。α=(C1+02)15 gain)C0, -1ra-,5c1+C2R1 When the above chemical conversion filter is applied with 3-width positive feedback and caused to oscillate, the imaginary part of the transfer function becomes zero, and ω=ω0, that is, the frequency f . It oscillates at J-ru. Further, the gain of the fundamental A frequency component at this time is A. As mentioned above (2. The oscillation circuit of the tree embodiment obtains a sine wave by passing the square wave signal through the band noise filter 3, so a sum is generated. Let the voltages of the combined square wave be E, V, -, When we expand the norieu, V 1(t) = “2
+ n=;, (4) z,% t sm (2n
+ 1)”11 t< a ()- is DC component)...
・・・・・・・・・・・・(2) This square wave is passed through the bandpass filter 3 - and the output VO (t> is 5in((2n+1)ω.t+5'2n+1 )−
...(3) That is, as a fundamental wave component; AE 1V
By adjusting the voltage E1 of the square wave, the amplitude of the sine wave can be easily adjusted.Also, the distortion factor γ is... ...(4) It is expressed as α = 01 (the difference is approximately), and the distortion rate is
A sine wave with less distortion can be obtained.
本発明の発振原理は一卜述したようであり、次Ｃ二動作
説明を行う。まず、回路全体（二電源が供給されると、
出力端ＯＵＴに信号が現われ、コンパレータ１（二人力
される。これ（二よって、メ゛ペアンフ。The oscillation principle of the present invention has been described above, and the operation will be explained next. First, the whole circuit (when two power supplies are supplied,
A signal appears at the output terminal OUT and is output to comparator 1 (2).
Ｑ＋の出力は反転増幅された信号が飽和し方形波となる
。ここで、子連した（３）式から工甲フイされるよう（
−所望の出力信号の振幅値（１応じて、方形波の電圧振
幅値Ｅ、が振幅調整回路２で調整される。即ちのように
、振幅調整された方形波は・：；１域フイルタ３に入力
され、前述した（１）式から理解されるようにこのシ１
１域フィルタ３の伝達特性に応じた正弦波出力が得られ
る。この時、スイッチＳ３のｖＪ換え（ユよる可変抵抗
■Ｒ１もしくは■Ｒ４の値に応じて共振周波数ｆ。の値
が変化する。The output of Q+ becomes a square wave when the inverted and amplified signal is saturated. Here, from the formula (3) which is connected to the child, it is assumed that the construction is completed (
- Depending on the amplitude value (1) of the desired output signal, the voltage amplitude value E of the square wave is adjusted in the amplitude adjustment circuit 2. That is, the amplitude adjusted square wave is... and as understood from equation (1) above, this system 1
A sine wave output corresponding to the transfer characteristic of the one-pass filter 3 is obtained. At this time, the value of the resonant frequency f changes depending on the value of the variable resistor (R1 or R4) depending on the vJ change of the switch S3.
また、」−述した実施例に於て、振幅調整回路２の後段
に設けられたスイッチＳ２を投入することに幅
より、コンパレータ１からの方形波出力の振市制幅
限量が最大（振→零）にすること（二より、この正帰還
ループの帰還量が零となるため発１辰は停止する。Furthermore, in the embodiment described above, the amplitude limit amount of the square wave output from the comparator 1 is maximized (oscillation → (2) Since the feedback amount of this positive feedback loop becomes zero, the generator 1 stops.
本発明の一実施例は上述したようであり、振幅調整回路
２が発振用の正帰還ループ内（−設けられており、この
調整手段により出力振幅を調整し得るためダイナミック
レンジを広くできると共に、歪の少ない正弦波を発振す
る。またこの振幅調整は抵抗値の切替えにより容易（二
行うことができる。One embodiment of the present invention is as described above, in which the amplitude adjustment circuit 2 is provided in the positive feedback loop for oscillation, and the output amplitude can be adjusted by this adjustment means, so that the dynamic range can be widened. It oscillates a sine wave with little distortion.Also, the amplitude can be easily adjusted by changing the resistance value.
また、帯域フィルタ３の伝達特性を時定数の切替え等に
より変えれば、容易に発振周波数を変更できる。更に、
発振停止ヌイツｆＳ２が振幅調整回路２の後段（−設け
られているので、発振の停止制御が容易である。Furthermore, the oscillation frequency can be easily changed by changing the transfer characteristic of the bandpass filter 3 by changing the time constant or the like. Furthermore,
Since the oscillation stopper fS2 is provided at the subsequent stage of the amplitude adjustment circuit 2, oscillation stop control is easy.
第３図は本発明の他の実施例の回路図であり、第２図の
実施例と対応した（１？Ｊ成要素（−は対応した符号を
イ」しである。FIG. 3 is a circuit diagram of another embodiment of the present invention, which corresponds to the embodiment of FIG. 2 (1?J components (- indicates the corresponding symbol).
本発明は上述したようであるため、夕”イナミツクレン
ジが広く歪の少ない発振出力を得ることができ、発振条
件（一応じて発振出力振幅１周ｂＵ数を容易に変更でき
る。従って、本発明の正弦波発振回路を例えば現像パイ
アヌ装置を内蔵した電子複写装置に供して７ｃの効果は
犬である。Since the present invention is as described above, it is possible to obtain an oscillation output with a wide range of noise and less distortion, and it is possible to easily change the oscillation output amplitude per cycle according to the oscillation conditions. When the sine wave oscillation circuit of the invention is applied to, for example, an electronic copying machine with a built-in developing device, the effect of 7c is excellent.
第１図は本発明に係る正弦波発振回路の基本構成を示す
ブロック図、第２図、第３図は第１図の基本構成（−基
づく、−実施例及び他の実施例の回路図である。
１・・・コンパレータ ２・・・振幅調整回路３・
・・帯域フィルタFIG. 1 is a block diagram showing the basic configuration of a sine wave oscillation circuit according to the present invention, and FIGS. 2 and 3 are circuit diagrams of the basic configuration of FIG. Yes. 1... Comparator 2... Amplitude adjustment circuit 3.
・Band filter
Claims (1)
ルタと、前記出力イパ号を方形波信号（：変換−ｒる手
段と、前記変換手段かしの方形波信号の振幅を制御する
手段とを備え、この・：；４域フイルタ（二対して前記
変換手段と、振幅制御手段を含む正帰還ル−プを形成す
ること（二上って所望の正弦波発振出力を得ることを特
徴とする正弦波発振回路。 （２） 前記化域フィルタの中心円を皮ｊ；（を変え
ること（二より正弦波出力の発振周波数を１１１・°１
１整することを特徴とする特許請求の範囲第［項記載の
正弦波発振回路。 覆えることを特徴とする特許請求の範囲第１項記載の正
弦波発振回路。 （４） 前記振幅制御手段（二より振幅制限量を最大
（ユすることによって発振を停止させることを４−８徴
どする特許請求の範囲第１項記載の正弦波発振回路。[Claims] (1) Obtaining a fundamental wave as an output signal: an 11-band filter, means for converting the output IPA signal into a square wave signal, and converting the square wave signal of the converting means into a square wave signal. means for controlling the amplitude, and forming a positive feedback loop including the converting means and the amplitude controlling means (two and four band filters), A sine wave oscillation circuit characterized in that the oscillation frequency of the sine wave output is 111°1 by changing the center circle of the band filter.
1. The sine wave oscillation circuit according to claim 1, wherein The sine wave oscillation circuit according to claim 1, wherein the sine wave oscillation circuit is covered. (4) The sine wave oscillation circuit according to claim 1, wherein the amplitude control means (4-8) stops oscillation by maximizing the amplitude limit amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16763082A JPS5957506A (en) | 1982-09-28 | 1982-09-28 | Sinusoidal wave oscillating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16763082A JPS5957506A (en) | 1982-09-28 | 1982-09-28 | Sinusoidal wave oscillating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5957506A true JPS5957506A (en) | 1984-04-03 |
Family
ID=15853340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16763082A Pending JPS5957506A (en) | 1982-09-28 | 1982-09-28 | Sinusoidal wave oscillating circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5957506A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6077502A (en) * | 1983-10-05 | 1985-05-02 | Nec Corp | Oscillating circuit |
-
1982
- 1982-09-28 JP JP16763082A patent/JPS5957506A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6077502A (en) * | 1983-10-05 | 1985-05-02 | Nec Corp | Oscillating circuit |
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