CN1214606A - Sound box with squealing preventing potentiometer unit - Google Patents
Sound box with squealing preventing potentiometer unit Download PDFInfo
- Publication number
- CN1214606A CN1214606A CN 97118774 CN97118774A CN1214606A CN 1214606 A CN1214606 A CN 1214606A CN 97118774 CN97118774 CN 97118774 CN 97118774 A CN97118774 A CN 97118774A CN 1214606 A CN1214606 A CN 1214606A
- Authority
- CN
- China
- Prior art keywords
- loudspeaker
- fuse
- squealing
- preventing
- adjustable potentiometer
- 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
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- Circuit For Audible Band Transducer (AREA)
- Amplifiers (AREA)
Abstract
The present invention is a unit with fuse and potentiometers for preventing loudspeaker from producing squealing and burning out caused by sudden increased current. It includes one fuse and one potentiometer connected serially before high- frequency loudspeaker and a potentiometer connected serially before medium-frequency loudspeaker.Before playing Karaoke, the potentiometers are adjusted at 40-60 ohms, and this can prevent the said accident.
Description
The invention belongs to the improvement of audio amplifier circuit, particularly one increases fuse and adjustable potentiometer in the audio amplifier circuit, the purpose that can use according to audio amplifier, the audio amplifier of the band adjustable potentiometer that in time reconcile, prevent to burn loudspeaker, prevents to utter long and high-pitched sounds, the device that prevents to utter long and high-pitched sounds.
Popular various audio amplifiers on the market, do not prevent that all loudspeaker from increasing the device of Burnout circuit suddenly because of electric current, do not cause that because of sing karaoke etc. electric current increases the prevent mean that produces sharp-pointed howling suddenly yet, so, in use often burn loudspeaker, produce ear-piercing incident of uttering long and high-pitched sounds and take place.
The objective of the invention is shortcoming at above-mentioned audio amplifier existence, develop a kind of audio amplifier with adjustable potentiometer and fuse, be installed in the audio amplifier circuit, can prevent effectively that loudspeaker from increasing Burnout circuit suddenly because of electric current, and prevent the howling that height, intermediate frequency loudspeaker send suddenly.
This bright purpose is achieved in that
In the high-frequency circuit in original audio amplifier circuit, connect a fuse and an adjustable potentiometer, adjustable potentiometer of series connection in intermediate-frequency circuit.Before sing karaoke, reconcile adjustable potentiometer to 30 earlier to 60 ohm.When producing the self-excitation electric current, but, do not utter long and high-pitched sounds so can not produce because position adjuster is effectively controlled acoustic pressure if microphone and audio amplifier interact.When electric current increased suddenly, fuse can fuse at first automatically, and the protection loudspeaker can not burn.
Owing to adopt circuit series connection fuse of the present invention and adjustable potentiometer, can effectively prevent the generation that electric current increases, burns loudspeaker suddenly, produces accidents such as uttering long and high-pitched sounds.
Accompanying drawing is an audio amplifier circuit diagram of the present invention, in conjunction with the accompanying drawings and embodiments, further describe the principle of circuit of the present invention: from the audible communication signal of sound amplifier input from signal input part 1, be transported to loudspeaker input 5 through series capacitors 2, fuse 3 and adjustable electrical equipment position 4, make the loudspeaker pronunciation; From signal input part 1, through series capacitors 12, inductance 6 and adjustable potentiometer 14, be input to intermediate frequency loudspeaker input 7, make the loudspeaker pronunciation; From signal input part 1, through inductance 15, make the bass horn pronunciation, empathize.
Claims (1)
1, the band adjustable potentiometer audio amplifier of device that prevents to utter long and high-pitched sounds, form by electric capacity and loudspeaker, it is characterized in that in electric capacity 2 and loudspeaker input 5 with, connect a fuse 3 and an adjustable potentiometer 4, in the middle of electric capacity 12 and intermediate frequency loudspeaker input 7, series connection adjustable potentiometer 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97118774 CN1214606A (en) | 1997-10-12 | 1997-10-12 | Sound box with squealing preventing potentiometer unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97118774 CN1214606A (en) | 1997-10-12 | 1997-10-12 | Sound box with squealing preventing potentiometer unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1214606A true CN1214606A (en) | 1999-04-21 |
Family
ID=5174958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97118774 Pending CN1214606A (en) | 1997-10-12 | 1997-10-12 | Sound box with squealing preventing potentiometer unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1214606A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107479993A (en) * | 2017-08-23 | 2017-12-15 | 惠州Tcl移动通信有限公司 | Mobile terminal and starup current, which are uttered long and high-pitched sounds, adjusts processing method and storage medium |
-
1997
- 1997-10-12 CN CN 97118774 patent/CN1214606A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107479993A (en) * | 2017-08-23 | 2017-12-15 | 惠州Tcl移动通信有限公司 | Mobile terminal and starup current, which are uttered long and high-pitched sounds, adjusts processing method and storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |