JPS5836360B2 - Shingoubunshiyu Cairo - Google Patents
Shingoubunshiyu CairoInfo
- Publication number
- JPS5836360B2 JPS5836360B2 JP49122663A JP12266374A JPS5836360B2 JP S5836360 B2 JPS5836360 B2 JP S5836360B2 JP 49122663 A JP49122663 A JP 49122663A JP 12266374 A JP12266374 A JP 12266374A JP S5836360 B2 JPS5836360 B2 JP S5836360B2
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- Prior art keywords
- signal
- terminal
- wave
- rectangular wave
- sawtooth
- 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.)
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Description
【発明の詳細な説明】
本発明は電子楽器の音源信号の分周等に有効な信号分周
回路に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a signal frequency dividing circuit that is effective for dividing the frequency of a sound source signal of an electronic musical instrument.
従来から電子楽器等の音源信号としては矩形波には含ま
れていない偶数倍次の高調波成分を含む波形として鋸歯
状波あるいは階段波がより望ましいことはよく知られて
いる。It has been well known that a sawtooth wave or a staircase wave is more desirable as a waveform containing even harmonic components not included in a rectangular wave as a sound source signal for an electronic musical instrument or the like.
一方の階段波の場合はその段数に応じて高次の偶数次高
調波成分が欠けることになるが、この欠除成分が可聴周
波数上限より上になるようにすれば、実質上鋸歯状波と
同じ音質効果をもつ。On the other hand, in the case of a staircase wave, higher even-order harmonic components are missing depending on the number of steps, but if this missing component is made to be above the upper limit of the audible frequency, it is effectively a sawtooth wave. It has the same sound quality effect.
これらの鋸歯状波ないし階段波が実際にはあまり用いら
れていないのは、これらの波形の分周が困難、ないしき
わめて複雑な回路を要し、高価になるためであった。The reason why these sawtooth waves or staircase waves are not often used in practice is that frequency division of these waveforms is difficult or requires extremely complicated circuitry, making it expensive.
本発明はこれらの信号波形分周の集積回路(IC)化な
いしLSI化しやすい回路方式を提供するものである。The present invention provides a circuit system that facilitates integration of these signal waveform frequency divisions into integrated circuits (ICs) or LSIs.
本発明は直列接続された矩形波分周器群と、R2R抵抗
回路網と、スイッチ群とを主構成要素とするものであり
、必要な抵抗値の範囲がきわめてせまく、そのため特性
値のそろったものが得やすく、またその他の回路素子に
も特別に高精度のものが要求されない特徴を有する。The main components of the present invention are a series-connected rectangular wave frequency divider group, an R2R resistance network, and a switch group, and the range of required resistance values is extremely narrow. It is easy to obtain, and other circuit elements do not require particularly high precision.
以下、本発明を実施例を用いて詳細に説明する。Hereinafter, the present invention will be explained in detail using examples.
第1図に本発明の一実施例を示す。FIG. 1 shows an embodiment of the present invention.
以下入力信号が鋸歯波形の場合について説明するが、階
段波等の場合も同様である。The case where the input signal has a sawtooth waveform will be described below, but the same applies to cases where the input signal is a staircase wave or the like.
図において、2〜5は分周器、6は鋸歯状電流波入力端
子、7〜11は定電流源、12〜16は電子スイッチ、
17,18,20,22,24は抵抗値Rの抵抗器、1
9,21,23,25は抵抗値2Rの抵抗器、1は矩形
波信号の入力端子、26は分周された鋸歯状波の出力端
子である。In the figure, 2 to 5 are frequency dividers, 6 is a sawtooth current wave input terminal, 7 to 11 are constant current sources, 12 to 16 are electronic switches,
17, 18, 20, 22, 24 are resistors with resistance value R, 1
9, 21, 23, and 25 are resistors with a resistance value of 2R, 1 is an input terminal for a rectangular wave signal, and 26 is an output terminal for a frequency-divided sawtooth wave.
端子1に供給する信号は端子6に加えられる鋸歯状波と
同期し、かつ鋸歯状波の半分の繰返し周波数の矩形波信
号であり、端子60入力信号を一段の分周器で分周した
信号を端子1に入力するのが簡便である。The signal supplied to terminal 1 is a rectangular wave signal that is synchronized with the sawtooth wave applied to terminal 6 and has a repetition frequency half that of the sawtooth wave, and is a signal obtained by dividing the input signal at terminal 60 with a single-stage frequency divider. It is convenient to input this into terminal 1.
この場合、端子6には鋸歯状波電流源が印加されている
ため、端子6に直列抵抗を挿入し、その両端の電圧を差
動アンプに取出す等の形式を用いてもよいし、あるいは
端子6に供給する鋸歯状波電流発生回路の途中から取り
出したトリガ信号を分周して用いてもよい。In this case, since a sawtooth wave current source is applied to terminal 6, it is also possible to insert a series resistor into terminal 6 and take out the voltage across it to a differential amplifier, or alternatively, The trigger signal taken out from the middle of the sawtooth wave current generating circuit supplied to the circuit 6 may be frequency-divided and used.
端子60入力信号を第2図aとしたときの端子1の信号
を同図bに示す。When the input signal to the terminal 60 is shown in FIG. 2a, the signal at the terminal 1 is shown in FIG. 2b.
端子6には第3図aに*木も示すように振幅■。Terminal 6 has an amplitude ■ as shown in Figure 3a.
の鋸歯状波電流が印加されており、一方定電流源7〜1
1の電流値も同じく■oに設定されている。A sawtooth wave current of is applied, while constant current sources 7 to 1
The current value of 1 is also set to ■o.
スイッチ12,13を経てR−2R抵抗回路網に流れる
電流はそれぞれ第3図b,dに示す通りの矩形波電流で
ある。The current flowing through the R-2R resistor network via switches 12 and 13 is a square wave current as shown in FIGS. 3b and 3d, respectively.
したがってスイッチ14〜16を経てR−2R抵抗回路
網に供給される電流も同様の矩形波であり、周期がそれ
ぞれ2倍、4倍、8倍となっている。Therefore, the current supplied to the R-2R resistor network via switches 14-16 is also a similar square wave, with periods twice, four times, and eight times, respectively.
いま、端子6およびスイッチ12〜16を経てR−2R
抵抗回路網に供給される電流をそれぞれ■1(t),,
■2(t)5ゝIa(ttとすると、端子26の電圧V
。Now, R-2R is connected via terminal 6 and switches 12 to 16.
Let the current supplied to the resistor network be 1(t), , respectively.
■If 2(t)5゜Ia(tt), the voltage at terminal 26 V
.
UT(j)は次式で表わされる。I t(t)〜Ia(
t)の振幅は■。UT(j) is expressed by the following equation. I t(t) ~ Ia(
The amplitude of t) is ■.
であるから■。UT(t)の振幅は■。Because ■. The amplitude of UT(t) is ■.
Rとなる。この様子を第3図c,eに示す。It becomes R. This situation is shown in FIGS. 3c and 3e.
第3図Cには矩形波1段と鋸歯状波との合成の例を、第
3図eには矩形波2段と鋸歯状波との合成の例をそれぞ
れ示す。FIG. 3C shows an example of combining one stage of rectangular waves and a sawtooth wave, and FIG. 3e shows an example of combining two stages of rectangular waves and sawtooth waves.
第3図c,e、第1式からもわかるように、本構成によ
れば分周段数に無関係に常に一定振幅I。As can be seen from FIGS. 3c and 3e and the first equation, according to this configuration, the amplitude I is always constant regardless of the number of frequency division stages.
Rの出力が得られるという大きな利点がある。There is a big advantage that an output of R can be obtained.
なお、第1図の実施例においては、抵抗25を2Rとし
たが、これはRでもよく、一般に任意の値rとしてもよ
い。In the embodiment shown in FIG. 1, the resistor 25 is 2R, but it may be R, or generally any value r.
この理由を説明する。いま、スイッチ12〜15が開で
、スイッチ16が閉で、入力端子6がオープンの場合を
仮定すると、スイッチ16と接地間の抵抗値は、抵抗1
1〜24の合成抵抗値2Rと抵抗25の抵抗値rとの並
列抵抗であり、
であるから、
出力端子26の電圧V1
は
となる。The reason for this will be explained. Now, assuming that switches 12 to 15 are open, switch 16 is closed, and input terminal 6 is open, the resistance value between switch 16 and ground is equal to resistance 1.
It is a parallel resistance of the combined resistance value 2R of 1 to 24 and the resistance value r of the resistor 25, and therefore, the voltage V1 of the output terminal 26 is as follows.
次に、スイッチ15のみ閉とし、他のスイッチ12〜1
4,16を開とし、入力端子6が前記と同様にオープン
の場合を仮定すると、スイッチ15と接地間の抵抗値は
、抵抗17〜22の合成抵抗値2Rと抵抗23の抵抗値
2Rと、抵抗24,250直列抵抗値(R十r)の3つ
の並列抵抗となり、
であるから、
出力端子26の電圧V2
は
となる。Next, only the switch 15 is closed, and the other switches 12 to 1 are closed.
Assuming that 4 and 16 are open and the input terminal 6 is open as described above, the resistance value between the switch 15 and the ground is the combined resistance value 2R of the resistors 17 to 22, the resistance value 2R of the resistor 23, There are three parallel resistances of resistors 24 and 250 series resistance values (R + r), and the voltage V2 at the output terminal 26 is as follows.
上記v1とV2を比較すれば明らかなように、定電流源
11からの出力は常に定電流源10からの出力の2倍に
なり、この比率は抵抗25の抵抗値rに関係なく常に一
定に保たれる。As is clear from comparing v1 and V2 above, the output from constant current source 11 is always twice the output from constant current source 10, and this ratio is always constant regardless of the resistance value r of resistor 25. It is maintained.
なお、このような動作は複数のスイッチ12〜16が閉
となり、入力端子6に入力が印加されたときも同様に行
なわれる。Note that such an operation is similarly performed when the plurality of switches 12 to 16 are closed and an input is applied to the input terminal 6.
本発明の他の実施例を第4図に示す。Another embodiment of the invention is shown in FIG.
端子101は鋸歯状波電圧信号入力端、端子102は定
電圧入力端、端子103は矩形波信号入力端、104〜
107は矩形波分周器、108〜112は電子スイッチ
、113,114,116,[8,120,122はそ
れぞれ抵抗値2Rの抵抗器、115,11 7,119
,121はそれぞれ抵抗値Rの抵抗器、123は分周さ
れた鋸歯状の出力端子、124はリセット信号入力端子
である。Terminal 101 is a sawtooth wave voltage signal input terminal, terminal 102 is a constant voltage input terminal, terminal 103 is a rectangular wave signal input terminal, 104 -
107 is a rectangular wave frequency divider, 108 to 112 are electronic switches, 113, 114, 116, [8, 120, 122 are each a resistor with a resistance value of 2R, 115, 11 7, 119
, 121 are resistors each having a resistance value R, 123 is a frequency-divided sawtooth output terminal, and 124 is a reset signal input terminal.
端子103に供給する矩形波は端子101の鋸歯状波と
同期し、鋸歯状波の半分の繰返し周波数の矩形波信号で
あり、端子101の入力信号を一段の分周器で分周した
信号を端子103に入力する。The rectangular wave supplied to the terminal 103 is a rectangular wave signal that is synchronized with the sawtooth wave of the terminal 101 and has a repetition frequency that is half that of the sawtooth wave. Input to terminal 103.
端子101の人力信号を第5図aとしたときの端子10
3の信号を第5図bに示す。Terminal 10 when the human input signal at terminal 101 is shown in Figure 5a
3 is shown in FIG. 5b.
端子101には第6図aにも示す通り振幅V。The terminal 101 has an amplitude V as shown in FIG. 6a.
の鋸歯状波が印加されており、一方端子102には上記
振幅値と同じ値■。A sawtooth wave is applied to the terminal 102, and the same amplitude value ■ as the above amplitude value is applied to the terminal 102.
の定電圧が印加されている。** 従ってスイッチ10
8,109を経て抵抗器114,116の上端に印加さ
れる電圧はそれぞれ第6図b,dに、示す通りの矩形波
電圧である。A constant voltage is applied. ** Therefore switch 10
The voltages applied to the upper ends of resistors 114 and 116 via resistors 8 and 109 are rectangular wave voltages as shown in FIGS. 6b and 6d, respectively.
よってスイッチ110〜112を経て抵抗118,12
0,122の上端に印加される電圧も同様に振幅V。Therefore, resistors 118 and 12 are connected via switches 110 to 112.
Similarly, the voltage applied to the upper end of 0,122 has an amplitude of V.
の矩形波であり、周期がそれぞれ2倍、4倍、8倍とな
っている。It is a rectangular wave with a period of 2 times, 4 times, and 8 times, respectively.
端子101およびスイッチ108〜112を経て抵抗1
14,116,118,120,122の上端に供給さ
れる電圧をそれぞれV1(t) j ■2(t) +V
3(’t)j V4(t)フ■5(t)フ■6 (t)
とすると、端子123の電圧V。Resistor 1 via terminal 101 and switches 108 to 112
The voltages supplied to the upper ends of 14, 116, 118, 120, and 122 are respectively V1(t) j ■2(t) +V
3('t)j V4(t)fu■5(t)fu■6 (t)
Then, the voltage at terminal 123 is V.
UT(jJは次式で表わされる。v1 (t)〜”a(
t)の振幅はV。UT(jJ is expressed by the following formula.v1(t)~”a(
The amplitude of t) is V.
であるからVOUT(j)の振幅もV。Therefore, the amplitude of VOUT(j) is also V.
どなる。第6図Cには矩形波1段と鋸歯状波との合成に
よる鋸歯状の%分周の例を、また同図eには矩形波2段
と鋸歯状波との合成による鋸歯状波のK分周の例をそれ
ぞれ示す。bawl. Figure 6C shows an example of sawtooth % frequency division by combining one stage of rectangular wave and sawtooth wave, and Figure 6e shows an example of sawtooth wave by combining two stages of rectangular wave and sawtooth wave. Examples of K frequency division are shown below.
第4図および第(2)式の例は矩形波5段と鋸歯状波と
の合成による鋸歯状波のy32分周の場合であり、第6
図eと同様にして振幅V。The example of FIG. 4 and equation (2) is a case of y32 division of a sawtooth wave by combining five stages of rectangular waves and a sawtooth wave.
The amplitude V in the same manner as in Figure e.
の鋸歯状波が得られることが理解されよう。It will be understood that a sawtooth waveform of .
このように本回路の特長の一つば分周段数に無関係に常
に一定の振幅■。One of the features of this circuit is that the amplitude is always constant regardless of the number of division stages.
の鋸歯状波出力が得られることである。A sawtooth wave output can be obtained.
端子124はリセット入力端子であり、同時に運転され
る他の分周回路群と位相を合わせるために使用される。Terminal 124 is a reset input terminal, and is used to match the phase with other frequency dividing circuit groups that are operated at the same time.
以上の説明は入力信号が鋸歯状波の場合についてのべた
が、階段波入力の場合にも全く同じ動作により分周され
ることは容易に埋解されよう。Although the above explanation has been made for the case where the input signal is a sawtooth wave, it is easily understood that the frequency division is performed by the same operation even when the input signal is a staircase wave.
この場合には分周された信号中の高次の偶数次高調波の
欠除は分周段数に無関係に一定周波数であるから、原信
号においてこの欠除成分が可聴周波数上限より上になる
ようにしておけば、音質効果としては何等鋸歯状波と差
のないものが得られる。In this case, since the deletion of high-order even-numbered harmonics in the frequency-divided signal has a constant frequency regardless of the number of division stages, it is necessary to ensure that this deletion component in the original signal is above the upper limit of the audible frequency. If you do this, you will get a sound quality effect that is no different from a sawtooth wave.
また、本発明の抵抗回路網に必要な高精度抵抗の抵抗値
はRと2Rといった2種類で済み、しかも2RはRの2
個の直列接続で容易に実現出来ることから、実質的には
1種類の抵抗であるといえる。In addition, the resistance value of the high-precision resistor required for the resistor network of the present invention is only two types, R and 2R, and 2R is the 2nd value of R.
Since it can be easily realized by connecting two resistors in series, it can be said that it is essentially one type of resistor.
このことは本回路を大量生産する場合にきわめて好都合
である。This is extremely advantageous when mass producing the circuit.
すなわち、本回路を個別部品で構成するときには抵抗は
同一材料、同一ロットで生産された素子を使用出来、特
性ばらつきが少なく、温度係数等のそろったものを低価
格で入手使用することが出来る。That is, when this circuit is constructed from individual components, resistors made from the same material and manufactured in the same lot can be used, and resistors with little variation in characteristics and uniform temperature coefficients can be obtained and used at low prices.
また本回路を集積回路化して構成するときには抵抗素子
の形状、寸法、チップ内の方向等をそろえることが出来
、これによって、きわめて精度よく特性のそろった素子
が実現出来る。Furthermore, when this circuit is configured as an integrated circuit, the shapes, dimensions, directions within the chip, etc. of the resistive elements can be made uniform, and as a result, elements with uniform characteristics can be realized with extremely high precision.
本発明はまた鋸歯状波、階段波のみに限るものではなく
、これらと類似の波形の分周にも適用できることはもち
ろんである。It goes without saying that the present invention is not limited to only sawtooth waves and staircase waves, but can also be applied to frequency division of waveforms similar to these.
二のように本発明は電子楽器の音源信号の分周等にきわ
めて有効な信号分周回路を提供することができる。As described in the second aspect, the present invention can provide a signal frequency dividing circuit that is extremely effective for dividing the frequency of a sound source signal of an electronic musical instrument.
第1図は本発明の一実施例における信号分周回路の結線
図、第2図は第1図の回路の波形図、第3図は第1図の
回路の動作を説明するための波形図、第4図は本発明の
他の実施例を示す回路図、第5図は第4図の回路の波形
図、第6図は第4図の回路の動作を説明するための波形
図である。
1・・・・・・矩形波信号入力端子、2〜5・・・・・
・分周器、6・・・・・鋸歯状波信号人力端子、7〜1
1・・・・・゜定電流源、12〜16・・・・・・スイ
ッチ、17〜25・・・・・・抵抗器、26・・・・・
・出力端子。Figure 1 is a wiring diagram of a signal frequency divider circuit in an embodiment of the present invention, Figure 2 is a waveform diagram of the circuit in Figure 1, and Figure 3 is a waveform diagram for explaining the operation of the circuit in Figure 1. , FIG. 4 is a circuit diagram showing another embodiment of the present invention, FIG. 5 is a waveform diagram of the circuit of FIG. 4, and FIG. 6 is a waveform diagram for explaining the operation of the circuit of FIG. 4. . 1... Square wave signal input terminal, 2-5...
・Frequency divider, 6...Sawtooth wave signal manual terminal, 7~1
1...゜Constant current source, 12-16...Switch, 17-25...Resistor, 26...
・Output terminal.
Claims (1)
と、該原信号の偶数倍の繰返し周期をもつ1または複数
の矩形波信号を発生する矩形波信号源と、定電流源また
は定電圧源と、上記矩形波信号によって開閉制御され、
上記定電流源または定電圧源の出力を上記矩形波信号の
周期に応じた周期の矩形波の形で導き出すスイッチと、
上記原信号と上記スイッチの矩形波出力とを加算する抵
抗回路網とを備え、上記抵抗回路網において、上記原信
号と上記スイッチの矩形波出力を、その振幅をすべて等
しくし、かつ加算比率を上記原信号の重み1に対して上
記矩形波出力の重みを1、2、4・・・・・・・・・と
して、加算するようにしたことを特徴とする信号分周回
路。1. An original signal source that generates a sawtooth wave or staircase wave original signal, a square wave signal source that generates one or more rectangular wave signals with a repetition period that is an even multiple of the original signal, and a constant current source or constant current source. Opening/closing is controlled by a voltage source and the above rectangular wave signal,
a switch that derives the output of the constant current source or the constant voltage source in the form of a rectangular wave with a period corresponding to the period of the rectangular wave signal;
a resistor network for adding the original signal and the rectangular wave output of the switch; A signal frequency dividing circuit characterized in that the weight of the rectangular wave output is added as 1, 2, 4, . . . to the weight of 1 of the original signal.
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP49122663A JPS5836360B2 (en) | 1974-10-23 | 1974-10-23 | Shingoubunshiyu Cairo |
US05/622,383 US4056033A (en) | 1974-10-18 | 1975-10-14 | Tone generator system for an electronic organ |
GB45544/76A GB1530960A (en) | 1974-10-18 | 1975-10-16 | Electronic keying circuit for a tone generator system of an electronic organ |
GB42475/76A GB1517390A (en) | 1974-10-18 | 1975-10-16 | Frequency dividing circuit for a tone generator system of an electronic organ |
DE2546610A DE2546610B2 (en) | 1974-10-18 | 1975-10-17 | Frequency divider for an electronic organ |
DE2559515A DE2559515C3 (en) | 1974-10-18 | 1975-10-17 | Electronic switching device for a tone generator system of an electronic organ |
IT51831/75A IT1056150B (en) | 1974-10-18 | 1975-10-17 | PERFECTION IN ELECTRONIC BODIES |
FR7532006A FR2288365A1 (en) | 1974-10-18 | 1975-10-20 | AUDIOFREQUENCY GENERATOR SYSTEM FOR ELECTRONIC ORGAN |
US05/824,802 US4173916A (en) | 1974-10-18 | 1977-08-15 | Tone generator system for an electronic organ |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP49122663A JPS5836360B2 (en) | 1974-10-23 | 1974-10-23 | Shingoubunshiyu Cairo |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5148328A JPS5148328A (en) | 1976-04-26 |
JPS5836360B2 true JPS5836360B2 (en) | 1983-08-09 |
Family
ID=14841542
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP49122663A Expired JPS5836360B2 (en) | 1974-10-18 | 1974-10-23 | Shingoubunshiyu Cairo |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5836360B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62242858A (en) * | 1986-04-15 | 1987-10-23 | Nippon Tectron Co Ltd | Cleaning device for probe |
JPH0412458Y2 (en) * | 1983-06-17 | 1992-03-25 |
-
1974
- 1974-10-23 JP JP49122663A patent/JPS5836360B2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0412458Y2 (en) * | 1983-06-17 | 1992-03-25 | ||
JPS62242858A (en) * | 1986-04-15 | 1987-10-23 | Nippon Tectron Co Ltd | Cleaning device for probe |
Also Published As
Publication number | Publication date |
---|---|
JPS5148328A (en) | 1976-04-26 |
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