JPS625790U - - Google Patents
Info
- Publication number
- JPS625790U JPS625790U JP9644085U JP9644085U JPS625790U JP S625790 U JPS625790 U JP S625790U JP 9644085 U JP9644085 U JP 9644085U JP 9644085 U JP9644085 U JP 9644085U JP S625790 U JPS625790 U JP S625790U
- Authority
- JP
- Japan
- Prior art keywords
- output
- power amplifier
- power
- adder
- 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、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、２１……第１電力
増幅器、２１……第１電力増幅器、２２……第２
電力増幅器、２３……減算器、２４……ローパス
フイルタ回路、２５……加算器、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，Ａ４……
それぞれ演算増幅器、Ｃ１，Ｃ２，Ｃ３……それ
ぞれコンデンサ、Ｌ１……半導体インダクタンス
、Ｒ１，Ｒ２，Ｒ３…，Ｒ１１……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 of an embodiment of this invention, and FIG. 3 is a block diagram illustrating a conventional example. 10...Low frequency band amplifier, 21...First power amplifier, 21...First power amplifier, 22...Second
Power amplifier, 23...Subtractor, 24...Low pass filter circuit, 25...Adder, 30...Speaker system, 31...Speaker for medium and high frequencies, 32...
...Bass speakers, A 1 , A 2 , A 3 , A 4 ...
Each is an operational amplifier, C 1 , C 2 , C 3 ... is a capacitor, L 1 is a semiconductor inductance, R 1 , R 2 , R 3 ..., R 11 is each a resistor, VR 1 is a variable resistor.
Claims (1)
低周波帯域増幅器と、前記オーデイオ入力信号の
或る定数α（但し、０＜α＜１）倍した信号と前
記低周波帯域増幅器の出力の（１―α）倍した信
号とを加算する加算器と、該加算器の出力を電力
増幅する第１電力増幅器と、前記低周波帯域増幅
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を２倍
した信号から前記加算器の出力を減算する減算器
と、該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 加算器の出力が反転出力し、第２電力増幅器
が第１電力増幅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 signal obtained by multiplying the audio input signal by a certain constant α (however, 0<α<1), and the low frequency component. an adder that adds a signal multiplied by (1-α) the output of the band amplifier; a first power amplifier that amplifies the power of the output of the adder; and a low-pass that blocks high frequency components of the output of the low frequency band amplifier. a filter circuit; a subtracter that subtracts the output of the adder from a signal obtained by doubling the output of the low-pass filter circuit; and a power amplifying circuit that amplifies the output of the subtracter in a phase opposite 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 adder 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 |
|---|---|---|---|
| JP9644085U JPH067676Y2 (en) | 1985-06-24 | 1985-06-24 | Loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9644085U JPH067676Y2 (en) | 1985-06-24 | 1985-06-24 | Loudspeaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS625790U true JPS625790U (en) | 1987-01-14 |
| JPH067676Y2 JPH067676Y2 (en) | 1994-02-23 |
Family
ID=30962187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9644085U Expired - Lifetime JPH067676Y2 (en) | 1985-06-24 | 1985-06-24 | Loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH067676Y2 (en) |
-
1985
- 1985-06-24 JP JP9644085U patent/JPH067676Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH067676Y2 (en) | 1994-02-23 |
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