JPS56152306A - Speaker protector - Google Patents
Speaker protectorInfo
- Publication number
- JPS56152306A JPS56152306A JP5476580A JP5476580A JPS56152306A JP S56152306 A JPS56152306 A JP S56152306A JP 5476580 A JP5476580 A JP 5476580A JP 5476580 A JP5476580 A JP 5476580A JP S56152306 A JPS56152306 A JP S56152306A
- Authority
- JP
- Japan
- Prior art keywords
- output
- speaker
- level
- speaker side
- supplied
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/52—Circuit arrangements for protecting such amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Circuit For Audible Band Transducer (AREA)
- Amplifiers (AREA)
Abstract
PURPOSE:To restrain the excessive output of the speaker, by making it possible to vary the restraint level of the upper limit of the output supplied to the speaker. CONSTITUTION:When the voice output is generated from driver circuit 1, it is amplified by Darlington connection circuits 21 and 22 and is given to the speaker side. The output supplied to the speaker side is detected by detecting parts 31 and 32; and when the control output reaches the level where transistors T31 and T32 of control parts 41 and 42 are turned on, the output to the speaker side is restrained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5476580A JPS56152306A (en) | 1980-04-24 | 1980-04-24 | Speaker protector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5476580A JPS56152306A (en) | 1980-04-24 | 1980-04-24 | Speaker protector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56152306A true JPS56152306A (en) | 1981-11-25 |
Family
ID=12979860
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5476580A Pending JPS56152306A (en) | 1980-04-24 | 1980-04-24 | Speaker protector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56152306A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1987000709A1 (en) * | 1985-07-22 | 1987-01-29 | Charters, John, Dumergue | Composite audio amplifier |
JPS62188598A (en) * | 1986-02-14 | 1987-08-18 | Nec Home Electronics Ltd | Voice output circuit |
US7888907B2 (en) | 2007-10-30 | 2011-02-15 | Bose Corporation | Controlled charging and use of power source |
US8073154B2 (en) | 2003-07-15 | 2011-12-06 | Bose Corporation | Supplying electrical power |
-
1980
- 1980-04-24 JP JP5476580A patent/JPS56152306A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1987000709A1 (en) * | 1985-07-22 | 1987-01-29 | Charters, John, Dumergue | Composite audio amplifier |
JPS62188598A (en) * | 1986-02-14 | 1987-08-18 | Nec Home Electronics Ltd | Voice output circuit |
US8073154B2 (en) | 2003-07-15 | 2011-12-06 | Bose Corporation | Supplying electrical power |
US7888907B2 (en) | 2007-10-30 | 2011-02-15 | Bose Corporation | Controlled charging and use of power source |
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