JPS625791U - - Google Patents
Info
- Publication number
- JPS625791U JPS625791U JP9644185U JP9644185U JPS625791U JP S625791 U JPS625791 U JP S625791U JP 9644185 U JP9644185 U JP 9644185U JP 9644185 U JP9644185 U JP 9644185U JP S625791 U JPS625791 U JP S625791U
- Authority
- JP
- Japan
- Prior art keywords
- output
- power
- power amplifier
- amplifier
- low frequency
- 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を説明する回路ブロツ
ク図、第３図は従来例を説明するブロツク図、で
ある。
１０……低周波帯域増幅器、２０……電力増幅
装置、２１……第１電力増幅器、２２……第２電
力増幅器、２３……第２減算器、２４……ローパ
スフイルタ回路、２５……第１減算器、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，Ａ
４……それぞれ演算増幅器、Ｃ１，Ｃ２，Ｃ３，
Ｃ４，……それぞれコンデンサ、Ｌ１……半導体
インダクタンス、Ｒ１，Ｒ２，Ｒ３…，Ｒ１０…
…それぞれ抵抗器、ＶＲ１……可変抵抗器。
Figure 1 is a circuit block diagram explaining this idea.
FIG. 2 is a circuit block diagram illustrating an embodiment of this invention, and FIG. 3 is a block diagram illustrating a conventional example. DESCRIPTION OF SYMBOLS 10... Low frequency band amplifier, 20... Power amplifier device, 21... First power amplifier, 22... Second power amplifier, 23... Second subtractor, 24... Low pass filter circuit, 25...... 1 subtractor, 30...
Speaker system, 31...Speaker for medium and high frequencies,
32... Bass speaker, A 1 , A 2 , A 3 , A
4 ... Operational amplifiers, C 1 , C 2 , C 3 , respectively
C 4 , ...respectively a capacitor, L 1 ... semiconductor inductance, R 1 , R 2 , R 3 ..., R 10 ...
...respectively resistor, VR 1 ...variable resistor.
Claims (1)
低周波帯域増幅器と、該低周波帯域増幅器の出力
を電力増幅する第１電力増幅器と、前記オーデイ
オ入力信号の或る正の定数β倍した信号を前記低
周波帯域増幅器の出力の（１＋β）倍した信号か
ら減算する第１減算器と、該第１減算器の出力の
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を２倍した信号か
ら前記低周波帯域増幅器の出力信号を減算する第
２減算器と、該第２減算器の出力を前記第１電力
増幅器と逆相に電力増幅する第２電力増幅器と、
前記第１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
１電力増幅器の出力のホツト側端子と前記第２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。 ２ 第２減算器の出力が反転出力し、第２電力増
幅器が第１電力増巾器と同相に電力増幅すること
を特徴とする実用新案登録請求の範囲第１項記載
の拡声装置。[Claims for Utility Model Registration] 1. A low frequency band amplifier that amplifies the low frequency component of an audio input signal, a first power amplifier that power amplifies the output of the low frequency band amplifier, and a first power amplifier that amplifies the output of the low frequency band amplifier; a first subtracter that subtracts a signal multiplied by a constant β from a signal multiplied by (1+β) of the output of the low frequency band amplifier; a low pass filter circuit that blocks high frequency components of the output of the first subtractor;
a second subtracter that subtracts the output signal of the low frequency band amplifier from a signal obtained by doubling the output of the low-pass filter circuit; and a second subtracter that power-amplifies the output of the second subtracter to have an opposite phase to that of the first power amplifier. 2 power amplifiers;
a mid-high frequency speaker connected between the hot side terminal of the output of the first power amplifier and the ground side terminal; and a speaker for medium and high frequencies connected between the hot side terminal of the output of the first power amplifier and the hot side terminal of the output of the second power amplifier. A public address system characterized by being equipped with a connected bass speaker. 2. The public address system according to claim 1, wherein the output of the second subtracter is inverted and the second power amplifier amplifies the power in phase with the first power amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9644185U JPH062397Y2 (en) | 1985-06-24 | 1985-06-24 | Loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9644185U JPH062397Y2 (en) | 1985-06-24 | 1985-06-24 | Loudspeaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS625791U true JPS625791U (en) | 1987-01-14 |
| JPH062397Y2 JPH062397Y2 (en) | 1994-01-19 |
Family
ID=30962189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9644185U Expired - Lifetime JPH062397Y2 (en) | 1985-06-24 | 1985-06-24 | Loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH062397Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0336326U (en) * | 1989-08-11 | 1991-04-09 |
-
1985
- 1985-06-24 JP JP9644185U patent/JPH062397Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0336326U (en) * | 1989-08-11 | 1991-04-09 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH062397Y2 (en) | 1994-01-19 |
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