JPS625792U - - Google Patents
Info
- Publication number
- JPS625792U JPS625792U JP9644285U JP9644285U JPS625792U JP S625792 U JPS625792 U JP S625792U JP 9644285 U JP9644285 U JP 9644285U JP 9644285 U JP9644285 U JP 9644285U JP S625792 U JPS625792 U JP S625792U
- Authority
- JP
- Japan
- Prior art keywords
- low
- output
- frequency band
- amplifier
- band amplifier
- 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.)
- Granted
Links
- 238000010586 diagram Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Description
第１図はこの考案を説明する回路ブロツク図、
第２図はこの考案の実施例の回路ブロツク図特性
図である。
１０……第一低周波帯域増幅器、２１……第一
電力増幅器、２２……第二電力増幅器、２３……
減算器、２４……ローパスフイルタ回路、２５…
…第二低周波帯域増幅器、３０……スピーカシス
テム、３１……中高音用スピーカ、３２……低音
用スピーカ、Ａ１，Ａ２，Ａ３，Ａ４，Ａ５……
それぞれ演算増幅器、Ｃ１，Ｃ２，Ｃ３，Ｃ４，
Ｃ５……それぞれコンデンサ、Ｌ１，Ｌ２……半
導体インダクタンス、Ｒ１，Ｒ２，Ｒ３，…，Ｒ
１３……それぞれ抵抗器、ＶＲ１，ＶＲ２……可
変抵抗器。
Figure 1 is a circuit block diagram explaining this idea.
FIG. 2 is a circuit block diagram and characteristic diagram of an embodiment of this invention. 10...first low frequency band amplifier, 21...first power amplifier, 22...second power amplifier, 23...
Subtractor, 24...Low pass filter circuit, 25...
...Second low frequency band amplifier, 30...Speaker system, 31...Speaker for medium and high frequencies, 32...Speaker for bass, A1 , A2 , A3 , A4 , A5 ...
operational amplifiers, C 1 , C 2 , C 3 , C 4 , respectively;
C 5 ... Capacitor, L 1 , L 2 ... Semiconductor inductance, R 1 , R 2 , R 3 ,..., R
13 ...respective resistors, VR1 , VR2 ...variable resistors.
Claims (1)
一低周波帯域増幅器と、該第一低周波帯域増幅器
の出力を電力増幅する第一電力増幅器と、前記第
一低周波帯域増幅器の出力の低周波成分を増幅す
る第三低周波帯域増幅器と、該第二低周波帯域増
幅器の出力の高周波成分を遮断するローパスフイ
ルタ回路と、該ローパスフイルタ回路の出力の２
倍の信号から前記第一低周波帯域増幅器の出力を
減算する減算器と、該減算器の出力を前記第一電
力増幅器と逆相に電力増幅する第三電力増幅器と
、前記第一電力増幅器の出力のホツト側端子とア
ース側端子間に接続の中高音用スピーカと、前記
第一電力増幅器の出力のホツト側端子と前記第二
電力増幅器の出力のホツト側端子間に接続の低音
用スピーカとを備えたことを特徴とする拡声装置
。 a first low frequency band amplifier that amplifies low frequency components of an audio input signal; a first power amplifier that power amplifies the output of the first low frequency band amplifier; and a low frequency component of the output of the first low frequency band amplifier. a third low-frequency band amplifier that amplifies the second low-frequency band amplifier; a low-pass filter circuit that blocks high-frequency components of the output of the second low-frequency band amplifier; and two of the outputs of the low-pass filter circuit.
a subtracter that subtracts the output of the first low frequency band amplifier from the multiplied signal; a third power amplifier that amplifies the output of the subtracter in opposite phase to that of the first power amplifier; a medium-high frequency speaker connected between an output hot side terminal and a ground side terminal; a bass speaker connected between an output hot side terminal of the first power amplifier and an output hot side terminal of the second power amplifier; A public address system characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9644285U JPH062398Y2 (en) | 1985-06-24 | 1985-06-24 | Loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9644285U JPH062398Y2 (en) | 1985-06-24 | 1985-06-24 | Loudspeaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS625792U true JPS625792U (en) | 1987-01-14 |
| JPH062398Y2 JPH062398Y2 (en) | 1994-01-19 |
Family
ID=30962191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9644285U Expired - Lifetime JPH062398Y2 (en) | 1985-06-24 | 1985-06-24 | Loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH062398Y2 (en) |
-
1985
- 1985-06-24 JP JP9644285U patent/JPH062398Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH062398Y2 (en) | 1994-01-19 |
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