JPS6123856Y2 - - Google Patents
Info
- Publication number
- JPS6123856Y2 JPS6123856Y2 JP1979172489U JP17248979U JPS6123856Y2 JP S6123856 Y2 JPS6123856 Y2 JP S6123856Y2 JP 1979172489 U JP1979172489 U JP 1979172489U JP 17248979 U JP17248979 U JP 17248979U JP S6123856 Y2 JPS6123856 Y2 JP S6123856Y2
- Authority
- JP
- Japan
- Prior art keywords
- variable
- amplifier
- switch
- graphic equalizer
- frequency characteristics
- 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.)
- Expired
Links
- 238000010586 diagram Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
Description
【考案の詳細な説明】
本考案は、音響機器の周波数特性の補正や音場
の補正に使用されるグラフイツク・イコライザに
関するものである。[Detailed Description of the Invention] The present invention relates to a graphic equalizer used for correcting the frequency characteristics of audio equipment and correcting the sound field.
グラフイツク・イコライザの用途の一つに、録
音時の音質調整があるが、これは録音時に高域を
増強し、再生時に高域を減衰してフラツトな特性
を得、SN比の向上を図るものである。 One of the uses of a graphic equalizer is to adjust the sound quality during recording, which increases the high range during recording and attenuates the high range during playback to obtain a flat characteristic and improve the signal-to-noise ratio. It is.
従来のグラフイツク・イコライザをこのような
用途に用いる場合、希望の調整位置で録音した
後、再生時には録音時と周波数特性が逆特性とな
るよう再度調整位置を設定しなおさなければなら
ないという不便があつた。 When using conventional graphic equalizers for such purposes, there is the inconvenience of having to record at the desired adjustment position and then resetting the adjustment position during playback so that the frequency characteristics are the opposite of those at the time of recording. Ta.
第１図はそのような従来のグラフイツク・イコ
ライザの一例を示すものである。第第１図におい
て１は入力端子、２は出力端子、３は増幅器、Ｒ
１は入力抵抗、Ｒ２は帰還抵抗、VR1〜VRoは可
変抵抗器、F1〜Ｆoは共振周波数が互に異なる共
振回路である。第１図において、ある可変抵抗器
の可変端子を（＋）側にすると、第２図に示すよ
うにその可変端子に接続されている共振回路の共
振周波数で増幅器３の帰還量が減少し、その周波
数が増強される。又可変抵抗器の可変端子を
（−）側にすると第３図に示すようにその可変端
子に接続されている共振回路の共振周波数で増幅
器３の入力インピーダンスが減少し、その周波数
が減衰する。なお、第２図、第３図において、第
１図と同一番号のものは同一機能をもつており、
ｒは共振回路の共振インピーダンス、Ｒは可変抵
抗器の一端から中点までの抵抗の並列接続された
ものである。 FIG. 1 shows an example of such a conventional graphic equalizer. In Fig. 1, 1 is an input terminal, 2 is an output terminal, 3 is an amplifier, and R
1 is an input resistor, R2 is a feedback resistor, VR 1 to VR o are variable resistors, and F 1 to F o are resonant circuits having different resonance frequencies. In Fig. 1, when the variable terminal of a certain variable resistor is set to the (+) side, the amount of feedback of the amplifier 3 decreases at the resonant frequency of the resonant circuit connected to the variable terminal, as shown in Fig. 2. Its frequency is enhanced. When the variable terminal of the variable resistor is set to the (-) side, the input impedance of the amplifier 3 decreases at the resonant frequency of the resonant circuit connected to the variable terminal, as shown in FIG. 3, and the frequency is attenuated. In Figures 2 and 3, the same numbers as in Figure 1 have the same functions.
r is the resonant impedance of the resonant circuit, and R is the resistance connected in parallel from one end to the middle point of the variable resistor.
このような従来のグラフイツク・イコライザで
は、可変抵抗器の可変端子を（＋）側または
（＋）側に操作しなければ逆周波特性が得られな
いから、録音時と再生時とで簡単に逆周波数特性
を得ることができないという問題がある。 With conventional graphic equalizers like this, reverse frequency characteristics cannot be obtained unless the variable terminal of the variable resistor is moved to the (+) side or (+) side, so it is easy to reverse the frequency characteristics during recording and playback. There is a problem that frequency characteristics cannot be obtained.
本考案はこのような従来の問題を解決するグラ
フイツク・イコライザを提供するものである。 The present invention provides a graphic equalizer that solves these conventional problems.
第４図に本考案によるグラフイツク・イコライ
ザの一実施例を示す。第４図において、第１図と
同一番号のものは同一機能を有する。そして４，
５は互に連動する第１，第２のスイツチである。
ここで、第１，第２のスイツチ４，５がポジシヨ
ン(1)に接続されている場合をノーマルポジシヨ
ン、ポジシヨン(2)に接続されている場合をリバー
スポジシヨンとすると、ノーマルポジシヨン(1)で
は、従来のグラフイツク・イコライザと同様に可
変抵抗器VR1〜VRnの可変端子を（＋）側に移動
させるとピーク特性となり、（−）側に移動させ
るとデイツプ特性となる。一方、第１，第２のス
イツチ４，５とリバースポジシヨン(2)に切換える
と、増幅器３の帰還回路に接続されていた第１の
スイツチ４が増幅器３の入力側に接続され、増幅
器３の入力側に接続されていた第２のスイツチ５
が増幅器３の帰還回路に接続されるため、可変抵
抗器VR1〜VRoの可変端子が（＋）側でデイツプ
特性、（−）側でピーク特性となり、ノーマルポ
ジシヨン(1)の場合の逆周波数特性となる。 FIG. 4 shows an embodiment of the graphic equalizer according to the present invention. In FIG. 4, parts with the same numbers as in FIG. 1 have the same functions. And 4,
Reference numeral 5 denotes first and second switches that operate in conjunction with each other.
Here, if the case where the first and second switches 4 and 5 are connected to position (1) is called the normal position, and the case where they are connected to position (2) is called the reverse position, then the normal position ( In 1), as with conventional graphic equalizers, moving the variable terminals of the variable resistors VR1 to VRn toward the (+) side results in a peak characteristic, and moving them toward the (-) side results in a dip characteristic. On the other hand, when the first and second switches 4 and 5 are switched to the reverse position (2), the first switch 4, which was connected to the feedback circuit of the amplifier 3, is connected to the input side of the amplifier 3, and the The second switch 5 connected to the input side of
is connected to the feedback circuit of amplifier 3, the variable terminals of variable resistors VR 1 to VR o have a dip characteristic on the (+) side and a peak characteristic on the (-) side, which is the same as in the normal position (1). It has reverse frequency characteristics.
第５図に本考案によるグラフイツク・イコライ
ザの他の実施例を示す。これは第２のスイツチ５
を増幅器３の出力側に接続したものであり、この
ようにしても同様の効果が得られる。なお、第５
図において第４図と同一番号のものは同一機能を
有しており、Ｒ３は増幅器３の出力抵抗を示して
いる。 FIG. 5 shows another embodiment of the graphic equalizer according to the present invention. This is the second switch 5
is connected to the output side of the amplifier 3, and the same effect can be obtained in this way. In addition, the fifth
In the figure, components with the same numbers as in FIG. 4 have the same functions, and R3 indicates the output resistance of the amplifier 3.
以上のように本考案によれば、従来のグラフイ
ツク・イコライザに２つのスイツチを付加するの
みで、簡単に逆周波数特性が実現できるという優
れた効果が得られる。 As described above, according to the present invention, an excellent effect can be obtained in that reverse frequency characteristics can be easily realized by simply adding two switches to a conventional graphic equalizer.
第１図は従来のグラフイツク・イコライザの回
路図、第２図，第３図は第１図の動作原理を説明
するための回路図、第４図は本考案のグラフイツ
ク・イコライザの一実施例の回路図、第５図は本
考案の他の実施例の回路図である。
１……入力端子、２……出力端子、３……増幅
器、４……第１のスイツチ、５……第２のスイツ
チ、VR1〜VRo……可変抵抗器、F1〜Ｆo……共
振回路。
Figure 1 is a circuit diagram of a conventional graphic equalizer, Figures 2 and 3 are circuit diagrams for explaining the operating principle of Figure 1, and Figure 4 is an embodiment of the graphic equalizer of the present invention. Circuit Diagram FIG. 5 is a circuit diagram of another embodiment of the present invention. 1...Input terminal, 2...Output terminal, 3...Amplifier, 4...First switch, 5...Second switch, VR 1 to VR o ... Variable resistor, F 1 to F o ... ...resonant circuit.
Claims (1)
ツチを介して一端が接続され、前記増幅器の入力
側又は出力側に第１のスイツチを介して他端が接
続され、その中点が接地された複数の可変抵抗器
と、これらの可変抵抗器の可変端子に接続される
共振周波数を異にする複数の共振回路で構成さ
れ、前記第１，第２のスイツチにより、前記可変
抵抗器の前記増幅器に接続される両端を交換し、
前記可変抵抗器の可変端子の同一の調整位置にお
いて逆周波数特性を得ることを特徴とするグラフ
イツク・イコライザ。 One end is connected to an amplifier and a feedback circuit of the amplifier via a first switch, the other end is connected to the input side or output side of the amplifier via a first switch, and the midpoint thereof is grounded. It is composed of a plurality of variable resistors and a plurality of resonant circuits having different resonance frequencies connected to variable terminals of these variable resistors, and the amplifier of the variable resistor is controlled by the first and second switches. Replace both ends connected to
A graphic equalizer characterized in that inverse frequency characteristics are obtained at the same adjustment position of the variable terminal of the variable resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1979172489U JPS6123856Y2 (en) | 1979-12-12 | 1979-12-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1979172489U JPS6123856Y2 (en) | 1979-12-12 | 1979-12-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5690014U JPS5690014U (en) | 1981-07-18 |
| JPS6123856Y2 true JPS6123856Y2 (en) | 1986-07-17 |
Family
ID=29683295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1979172489U Expired JPS6123856Y2 (en) | 1979-12-12 | 1979-12-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6123856Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0671357B2 (en) * | 1984-03-08 | 1994-09-07 | 富士通テン株式会社 | Hearing correction device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS501780A (en) * | 1973-05-02 | 1975-01-09 | ||
| US4046960A (en) * | 1975-12-31 | 1977-09-06 | Veale John R | Audio fidelity frequency equalizer system |
-
1979
- 1979-12-12 JP JP1979172489U patent/JPS6123856Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS501780A (en) * | 1973-05-02 | 1975-01-09 | ||
| US4046960A (en) * | 1975-12-31 | 1977-09-06 | Veale John R | Audio fidelity frequency equalizer system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5690014U (en) | 1981-07-18 |
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