JPH02147994U - - Google Patents
Info
- Publication number
- JPH02147994U JPH02147994U JP5703389U JP5703389U JPH02147994U JP H02147994 U JPH02147994 U JP H02147994U JP 5703389 U JP5703389 U JP 5703389U JP 5703389 U JP5703389 U JP 5703389U JP H02147994 U JPH02147994 U JP H02147994U
- Authority
- JP
- Japan
- Prior art keywords
- speaker
- drive circuit
- output
- feedback means
- speed detector
- 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 3
- 230000003321 amplification Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
Description
第１図はこの考案に係るスピーカ・ドライブ回
路の実施例を示したブロツク図である。第２図及
び第３図は従来例を示し、第２図は帰還ループを
持たないスピーカ・ドライブ回路のブロツク図、
第３図はモーシヨナルフイードバツクの負帰還ル
ープのみを持つたスピーカ・ドライブ回路のブロ
ツク図である。
主な符号の説明、１：オーデイオ信号の入力端
子、２：スピーカをドライブする増幅回路、３：
スピーカ、４：レーザ発振器、５：速度検出器、
６：積分回路、７：反転増幅回路、８：帰還用増
幅回路、９：速度検出用センシングコイリ。
FIG. 1 is a block diagram showing an embodiment of a speaker drive circuit according to this invention. Figures 2 and 3 show conventional examples, and Figure 2 is a block diagram of a speaker drive circuit without a feedback loop.
FIG. 3 is a block diagram of a speaker drive circuit having only a negative feedback loop for motional feedback. Explanation of main symbols: 1: Audio signal input terminal, 2: Amplification circuit that drives the speaker, 3:
Speaker, 4: Laser oscillator, 5: Speed detector,
6: Integrating circuit, 7: Inverting amplifier circuit, 8: Feedback amplifier circuit, 9: Sensing coil for speed detection.
Claims (1)
と、このスピーカを駆動する駆動回路とで構成し
たスピーカ・ドライブ回路において、 スピーカの可動部の速度をレーザドツプラ効果
を用いて検出する速度検出器と、この速度検出器
の出力を上記駆動回路に負帰還する負帰還手段を
備えたことを特徴とするスピーカ・ドライブ回路
。 ２ 上記速度検出器の出力を積分する積分回路と
、この積分回路の出力を駆動回路に正帰還する正
帰還手段とを備えて、上記負帰還手段とを併用し
て構成したことを特徴とする請求項１記載のスピ
ーカ・ドライブ回路。[Claims for Utility Model Registration] 1. In a speaker drive circuit consisting of a speaker that converts electrical signals into acoustic energy and a drive circuit that drives this speaker, the speed of the moving part of the speaker is detected using the laser Doppler effect. 1. A speaker drive circuit comprising: a speed detector; and negative feedback means for negatively feeding an output of the speed detector to the drive circuit. 2. It is characterized by comprising an integrating circuit that integrates the output of the speed detector, and positive feedback means that positively feeds back the output of the integrating circuit to the drive circuit, and in combination with the negative feedback means. The speaker drive circuit according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5703389U JPH02147994U (en) | 1989-05-19 | 1989-05-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5703389U JPH02147994U (en) | 1989-05-19 | 1989-05-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02147994U true JPH02147994U (en) | 1990-12-17 |
Family
ID=31581381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5703389U Pending JPH02147994U (en) | 1989-05-19 | 1989-05-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02147994U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000333287A (en) * | 1999-05-19 | 2000-11-30 | Matsushita Electric Ind Co Ltd | Loudspeaker system |
-
1989
- 1989-05-19 JP JP5703389U patent/JPH02147994U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000333287A (en) * | 1999-05-19 | 2000-11-30 | Matsushita Electric Ind Co Ltd | Loudspeaker system |
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