JPS6158050B2 - - Google Patents
Info
- Publication number
- JPS6158050B2 JPS6158050B2 JP55079762A JP7976280A JPS6158050B2 JP S6158050 B2 JPS6158050 B2 JP S6158050B2 JP 55079762 A JP55079762 A JP 55079762A JP 7976280 A JP7976280 A JP 7976280A JP S6158050 B2 JPS6158050 B2 JP S6158050B2
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- sound quality
- volume
- control
- circuit
- 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
- 238000003908 quality control method Methods 0.000 claims description 13
- 230000000694 effects Effects 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000005236 sound signal Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
- H03G9/02—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers
Landscapes
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
Description
【発明の詳細な説明】
本発明は、音響機器に用いられる音質制御回路
に関し、特に集積回路素子（IC）化した場合に
有用なラウドネス制御手段を提供しようとするも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sound quality control circuit used in audio equipment, and particularly aims to provide a useful loudness control means when implemented as an integrated circuit element (IC).
従来から知られているラウドネス制御手段は第
１図に示すようなもので、音声信号の入力端子１
と出力端子２との間に設けた音量調整用の可変抵
抗器３に中間タツプを設けてコンデンサ４と抵抗
５を接続し、また、入力端子１にもコンデンサ６
を接続し、スイツチ７によつてコンデンサ４，６
を動作させるか否かを切換えるようにしたもので
ある。スイツチ７をａ側に切換えてコンデンサ
４，６を動作させた場合には、音量調整用可変抵
抗器３で小さい音量に調整したときに低音域と高
音域が増大されていわゆるラウドネス効果が得ら
れるようになされている。 A conventionally known loudness control means is as shown in FIG.
A capacitor 4 and a resistor 5 are connected by providing an intermediate tap on the variable resistor 3 for adjusting the volume between the output terminal 2 and the output terminal 2, and a capacitor 6 is also connected to the input terminal 1.
and switch 7 connects capacitors 4 and 6.
It is designed to switch whether or not to operate. When the switch 7 is switched to the a side and the capacitors 4 and 6 are operated, when the volume is adjusted to a low volume using the variable resistor 3 for adjusting the volume, the bass and treble ranges are increased and a so-called loudness effect is obtained. It is done like this.
ところが、このような従来のものでは、第２図
のようなIC化された音量・音質制御回路には使
用できないという欠点がある。第２図において、
８は音声信号の入力端子、９はその出力端子、１
０は低音域制御用の増幅器、１１は高音域制御用
の増幅器、１２は音量制御用の増幅器であり、こ
れらの増幅器１０，１１，１２はいずれも印加さ
れる直流の制御電圧によつて増幅率が制御される
電圧制御形のものを用いる。１３，１４，１５は
それぞれ低音域制御用、高音域制御用および音量
制御用の制御電圧を調整する調整用の可変抵抗器
であり、１６，１７，１８はそれぞれの制御電圧
を適当に変換して増幅器１０，１１，１２に加え
る制御回路である。この回路において破線で囲ん
だ部分がIC素子の内部に組み込まれる。しかる
に、従来にはこの第２図のようなIC化された音
量・音質制御回路に有効なラウドネス制御手段が
無いという問題があつた。 However, such a conventional device has the disadvantage that it cannot be used in an IC-based volume/sound quality control circuit as shown in FIG. In Figure 2,
8 is the audio signal input terminal, 9 is its output terminal, 1
0 is an amplifier for controlling the low frequency range, 11 is an amplifier for controlling the high frequency range, and 12 is an amplifier for controlling the volume. These amplifiers 10, 11, and 12 are all amplified by the applied DC control voltage. A voltage-controlled type with controlled rate is used. 13, 14, and 15 are variable resistors for adjusting the control voltages for bass range control, treble range control, and volume control, respectively, and 16, 17, and 18 are for appropriately converting the respective control voltages. This is a control circuit added to the amplifiers 10, 11, and 12. In this circuit, the part surrounded by the broken line is incorporated inside the IC element. However, in the past, there was a problem in that there was no effective loudness control means for the IC-based volume/sound quality control circuit as shown in FIG.
そこで本発明はかかる従来の問題を解消して、
IC化された場合に有効なラウドネス制御手段を
備えた音質制御回路を提供することを目的とする
ものである。 Therefore, the present invention solves such conventional problems, and
It is an object of the present invention to provide a sound quality control circuit equipped with effective loudness control means when implemented as an IC.
以下、本発明の一実施例について、第３，４図
を参照しつつ詳細に説明する。第３図はその構成
を示し、第２図中と同様の部分には同一符号を付
して説明を省略する。この回路においては、低音
域と高音域の音質調整用の可変抵抗器１３，１４
の一端とアースとの間に、その音質制御用の電圧
を低音域と高音域を増大させる方向に変化させる
抵抗１９を接続し、この抵抗１９と並列にこの抵
抗１９を動作させるか否かを切換えるスイツチ２
０を接続する。また、抵抗１９と並列にトランジ
スタ２１を接続し、そのベースを抵抗２２と定電
圧ダイオード２３を介して音量調整用の可変抵抗
器１５の出力端子に結合する。 Hereinafter, one embodiment of the present invention will be described in detail with reference to FIGS. 3 and 4. FIG. 3 shows its configuration, and the same parts as in FIG. 2 are given the same reference numerals and their explanation will be omitted. In this circuit, variable resistors 13 and 14 are used to adjust the sound quality in the bass and treble ranges.
A resistor 19 that changes the sound quality control voltage in the direction of increasing the bass and treble ranges is connected between one end and the ground, and a resistor 19 is connected in parallel to determine whether or not to operate the resistor 19. Switch 2
Connect 0. Further, a transistor 21 is connected in parallel with the resistor 19, and its base is coupled via a resistor 22 and a constant voltage diode 23 to an output terminal of a variable resistor 15 for adjusting the volume.
かかる構成において、スイツチ２０を閉じてお
けば、抵抗１９を短絡してその動作を停止させる
ので、ラウドネス効果のない音量・音質制御がな
される。一方、このスイツチ２０を開いておけ
ば、音量調整用可変抵抗器１５からの制御電圧が
小さくて音量が小さい範囲に調整されているとき
には、定電圧ダイオード２３が導通しないのでト
ランジスタ２１も遮断状態になり、抵抗１９が動
作して可変抵抗器１３，１４からの出力制御電圧
が増大する。これにより、音質の低音域と高音域
とが増大されてラウドネス効果が得られることに
なる。可変抵抗器１５により音量を大きくするよ
うに調整されると、音量が中程度以上に調整され
たときに定電圧ダイオード２３が導通し、これに
よつてトランジスタ２１も導通されるため抵抗１
９が短絡され、ラウドネス効果は消滅する。この
とき、定電圧ダイオード２３を除去して抵抗２２
のみとしておけば、小音量の範囲内でその音量に
応じて音量が小さいほどラウドネス効果を大きく
するような制御ができることになる。 In this configuration, if the switch 20 is closed, the resistor 19 is short-circuited and its operation is stopped, so that the volume and sound quality can be controlled without any loudness effect. On the other hand, if this switch 20 is opened, when the control voltage from the volume adjustment variable resistor 15 is small and the volume is adjusted to a small range, the constant voltage diode 23 is not conductive, so the transistor 21 is also cut off. As a result, the resistor 19 operates and the output control voltages from the variable resistors 13 and 14 increase. As a result, the bass and treble ranges of the sound quality are increased, resulting in a loudness effect. When the volume is adjusted to be louder by the variable resistor 15, the constant voltage diode 23 becomes conductive when the volume is adjusted to a medium level or above, and as a result, the transistor 21 also becomes conductive, so that the resistor 1
9 is shorted and the loudness effect disappears. At this time, the constant voltage diode 23 is removed and the resistor 22
If it is set to only 1, it is possible to control the loudness effect so that the smaller the volume is, the louder the loudness effect is, within the range of low volume.
第４図はその制御特性を示し、Ａは可変抵抗器
１５を調整したときのＸ点の電圧で、実線は定電
圧ダイオード２３を用いた場合のもの、破線は用
いない場合のものである。Ｂは各音量制御電圧
V1〜V4に対する音質の変化を示す周波数特性図
である。 FIG. 4 shows its control characteristics, where A is the voltage at point X when adjusting the variable resistor 15, the solid line is the voltage when the constant voltage diode 23 is used, and the broken line is the voltage when it is not used. B is each volume control voltage
It is a frequency characteristic diagram which shows the change of sound quality with respect to V1 - V4 .
なお、スイツチ２０は省略してもよい。以上の
ように本発明によれば、音量が小さい時に高音
域、低音域を自動的に増大させて音質補正を行な
い、ある音量以上では音質制御用の可変抵抗器で
設定した周波数特性を得るIC化して直流の制御
電圧による有効な音質制御回路を得ることができ
るものである。 Note that the switch 20 may be omitted. As described above, according to the present invention, when the volume is low, the IC automatically increases the high and low frequencies to correct the sound quality, and when the volume exceeds a certain level, the IC obtains the frequency characteristics set by the variable resistor for sound quality control. This makes it possible to obtain an effective sound quality control circuit using a DC control voltage.
第１図および第２図は従来の音質制御装置の回
路図、第３図は本発明の一実施例における音質制
御装置の回路図、第４図Ａ，Ｂはその特性図であ
る。
８……入力端子、９……出力端子、１０……低
音域制御用の増幅器、１１……高音域制御用の増
幅器、１２……音量制御用の増幅器、１３，１
４，１５……可変抵抗器、１６，１７，１８……
制御回路、１９……抵抗、２０……スイツチ、２
１……トランジスタ、２２……抵抗、２３……定
電圧ダイオード。
1 and 2 are circuit diagrams of a conventional sound quality control device, FIG. 3 is a circuit diagram of a sound quality control device according to an embodiment of the present invention, and FIGS. 4A and 4B are characteristic diagrams thereof. 8...Input terminal, 9...Output terminal, 10...Amplifier for low frequency control, 11...Amplifier for high frequency control, 12...Amplifier for volume control, 13,1
4, 15...variable resistor, 16, 17, 18...
Control circuit, 19...Resistor, 20...Switch, 2
1... Transistor, 22... Resistor, 23... Constant voltage diode.
Claims (1)
音域、又は少なくとも一方を制御する音質制御回
路と、上記音質制御回路に印加する制御電圧を調
整する手段と上記音質制御電圧を小音量時のみ音
量に応じて高音域及び低音域を増大させるラウド
ネス回路を備え、ラウドネス回路を上記音質調整
手段に直列に接続した抵抗器とこの抵抗器に並列
に接続したトランジスタとトランジスタのベース
を抵抗器又は抵抗器と直列に接続した定電圧ダイ
オードを介して音量調整手段に接続して構成した
音質制御装置。1. A sound quality control circuit that controls the treble range and/or the low range, or at least one of them, by an applied DC control voltage, a means for adjusting the control voltage applied to the sound quality control circuit, and a means for adjusting the sound quality control voltage to a volume only when the volume is low. The loudness circuit is equipped with a loudness circuit that increases the treble range and the bass range accordingly, and the loudness circuit is connected in series to the sound quality adjusting means, a resistor, a transistor connected in parallel to the resistor, and a base of the transistor connected to the resistor or the resistor. A sound quality control device configured by connecting to a volume adjustment means via a constant voltage diode connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7976280A JPS575412A (en) | 1980-06-12 | 1980-06-12 | Controller for tone quality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7976280A JPS575412A (en) | 1980-06-12 | 1980-06-12 | Controller for tone quality |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS575412A JPS575412A (en) | 1982-01-12 |
| JPS6158050B2 true JPS6158050B2 (en) | 1986-12-10 |
Family
ID=13699224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7976280A Granted JPS575412A (en) | 1980-06-12 | 1980-06-12 | Controller for tone quality |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS575412A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58109328U (en) * | 1982-01-19 | 1983-07-26 | 三洋電機株式会社 | Loudness control circuit |
| JPS5986722U (en) * | 1982-12-01 | 1984-06-12 | クラリオン株式会社 | Loudness circuit for electronic volume circuit |
| JPS60172418U (en) * | 1984-04-23 | 1985-11-15 | 富士通テン株式会社 | Sound quality characteristic circuit |
| JPS6153810A (en) * | 1984-08-23 | 1986-03-17 | Fujitsu Ten Ltd | Sound quality adjusting device of audio amplifier |
| JPS6342512A (en) * | 1986-08-09 | 1988-02-23 | Fujitsu Ten Ltd | Tone control circuit |
| EP0621687B1 (en) * | 1993-04-23 | 2000-04-05 | Philips Electronics N.V. | Audio amplifier arrangement |
-
1980
- 1980-06-12 JP JP7976280A patent/JPS575412A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS575412A (en) | 1982-01-12 |
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