JPH01159419U - - Google Patents
Info
- Publication number
- JPH01159419U JPH01159419U JP5444088U JP5444088U JPH01159419U JP H01159419 U JPH01159419 U JP H01159419U JP 5444088 U JP5444088 U JP 5444088U JP 5444088 U JP5444088 U JP 5444088U JP H01159419 U JPH01159419 U JP H01159419U
- Authority
- JP
- Japan
- Prior art keywords
- sound quality
- bandpass filter
- adjustment means
- quality adjustment
- acoustic 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
- 238000010586 diagram Methods 0.000 description 9
- 230000003321 amplification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Landscapes
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
- Amplifiers (AREA)
Description
第１図は本考案にかかわる音質調整回路の電気
回路図、第２図は中心周波数がｆ１であるバンド
パスフイルタＢＰＦ１において発生したノイズの
周波数分布と、そのノイズレベルがローパスフイ
ルタであるフイルタＦ１によつて低減されること
を説明するための周波数特性図、第３図は中心周
波数がｆｎであるバンドパスフイルタＢＰＦｎに
おいて発生したノイズの周波数分布と、そのノイ
ズレベルがハイパスフイルタであるフイルタＦｎ
によつて低減されることを説明するための周波数
特性図、第４図は従来の音質調整回路の電気回路
図、第５図は音質調整回路で用いられているバン
ドパスフイルタＢＰＦ１〜ＢＰＦｎのそれぞれの
周波数特性図、第６図は第４図の可変抵抗器ＶＲ
５１の接触片５３が増強位置ａに設定された場合
の音質調整回路の動作を説明するための電気回路
図、第７図は第６図に示す音質調整回路の周波数
特性図、第８図は第４図において可変抵抗器ＶＲ
５１の接触片５３が減衰位置ｂに設定された場合
の音質調整回路の動作を説明するための電気回路
図、第９図は第８図に示す音質調整回路の周波数
特性図、第１０図は従来の音質調整回路の問題点
を説明するための電気回路図である。
１…入力端子、２…出力端子、ＩＣ１〜ＩＣ３
…増幅回路、Ｒ１，Ｒ２，Ｒ５〜Ｒ８…抵抗、Ｂ
ＰＦ１〜ＢＰＦｎ…バンドパスフイルタ、Ｆ１〜
Ｆｎ…フイルタ、Ａ１〜Ａｎ…利得設定回路、ｓ
ｌ１…信号ライン。
Fig. 1 is an electrical circuit diagram of the sound quality adjustment circuit according to the present invention, and Fig. 2 shows the frequency distribution of noise generated in the band pass filter BPF1 whose center frequency is f1 , and the noise level of the filter F1 which is a low pass filter. Figure 3 shows the frequency distribution of the noise generated in the bandpass filter BPFn whose center frequency is fn and the noise level of the filter Fn, which is a high-pass filter.
4 is an electric circuit diagram of a conventional sound quality adjustment circuit, and FIG. 5 is a frequency characteristic diagram for explaining that the sound quality adjustment circuit is reduced by The frequency characteristic diagram of Fig. 6 is the variable resistor VR of Fig. 4.
An electric circuit diagram for explaining the operation of the sound quality adjustment circuit when the contact piece 53 of 51 is set at the reinforcement position a, FIG. 7 is a frequency characteristic diagram of the sound quality adjustment circuit shown in FIG. 6, and FIG. In Figure 4, variable resistor VR
An electric circuit diagram for explaining the operation of the sound quality adjustment circuit when the contact piece 53 of 51 is set at the attenuation position b, FIG. 9 is a frequency characteristic diagram of the sound quality adjustment circuit shown in FIG. 8, and FIG. FIG. 2 is an electrical circuit diagram for explaining problems with a conventional sound quality adjustment circuit. 1...Input terminal, 2...Output terminal, IC1 to IC3
...Amplification circuit, R1, R2, R5-R8...Resistance, B
PF1~BPFn...Band pass filter, F1~
Fn...filter, A1-An...gain setting circuit, s
l1...Signal line.
Claims (1)
バンドパスフイルタと、 前記バンドパスフイルタの出力レベルを調整す
る調整手段と、 前記調整手段の出力を加算して導出する加算手
段とを含む音質調整回路において、 前記バンドパスフイルタと前記調整手段との間
、または前記調整手段と前記加算手段との間に、
前記バンドパスフイルタの通過周波数帯では音響
信号を通過させ、その他の周波数帯域の少なくと
も一部で音響信号を遮断するフイルタを設けたこ
とを特徴とする音質調整回路。[Claims for Utility Model Registration] A bandpass filter that waves an acoustic signal into each of a plurality of passing frequency bands; an adjustment means that adjusts the output level of the bandpass filter; and an output of the adjustment means that is derived by adding together the outputs of the adjustment means. In the sound quality adjustment circuit including an addition means, between the bandpass filter and the adjustment means, or between the adjustment means and the addition means,
A sound quality adjustment circuit comprising a filter that passes an acoustic signal in a frequency band passed by the bandpass filter and blocks the acoustic signal in at least part of other frequency bands.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5444088U JPH01159419U (en) | 1988-04-21 | 1988-04-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5444088U JPH01159419U (en) | 1988-04-21 | 1988-04-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01159419U true JPH01159419U (en) | 1989-11-06 |
Family
ID=31280371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5444088U Pending JPH01159419U (en) | 1988-04-21 | 1988-04-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01159419U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61123305A (en) * | 1984-11-20 | 1986-06-11 | Matsushita Electric Ind Co Ltd | Frequency characteristic correcting circuit |
-
1988
- 1988-04-21 JP JP5444088U patent/JPH01159419U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61123305A (en) * | 1984-11-20 | 1986-06-11 | Matsushita Electric Ind Co Ltd | Frequency characteristic correcting circuit |
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