CN104640010A - High-fidelity loudspeaker box for computers - Google Patents
High-fidelity loudspeaker box for computers Download PDFInfo
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- CN104640010A CN104640010A CN201310572452.2A CN201310572452A CN104640010A CN 104640010 A CN104640010 A CN 104640010A CN 201310572452 A CN201310572452 A CN 201310572452A CN 104640010 A CN104640010 A CN 104640010A
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Abstract
The invention discloses a high-fidelity loudspeaker box for computers. The high-fidelity loudspeaker box comprises a power supply, a loudspeaker, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an amplifier and a potentiometer. The amplifier, the fourth capacitor, the fifth capacitor, the seventh capacitor, the fourth resistor and the seventh resistor form an amplifying circuit, amplification volume of the loudspeaker box can be changed by changing the resistance of the fourth resistor, the larger the resistance is, the higher the gain is, sensitivity and amplification coefficient suitable for various computers can be obtained, and the first resistor and the first capacitor form an RC network which can prevent low-frequency self-excitation to protect the loudspeaker and the amplifier. The high-fidelity loudspeaker box has the advantages of simple structure and low energy consumption, audio signals outputted by the loudspeaker box are high in fidelity, sound is good, and the RC network composed of the first resistor and the first capacitor can prevent low-frequency self-excitation to protect the loudspeaker and the amplifier.
Description
Technical field
The present invention relates to a kind of sound equipment for computer, particularly relate to a kind of Hi-Fi sound-box for computer.
Background technology
Computer sound box is the terminal of whole sound system, its effect is that audio frequency electric energy is converted to corresponding acoustic energy, and it is radiated space, which is responsible and the signal of telecommunication is transformed into acoustical signal directly listens to so mission critical for the ear of people, it is wanted directly and the sense of hearing of people is come into contacts with., there is complex structure, consume energy high, that audio signal fidelity degree is low and sense of hearing is poor shortcoming in the multimedia active loundspeakers of the sound system that general computer is equipped with low price often, and easily produces low frequency self-excitation, infringement loudspeaker and amplifier.
Summary of the invention
Object of the present invention is just to provide a kind of Hi-Fi sound-box for computer to solve the problem.
In order to achieve the above object, present invention employs following technical scheme:
A kind of Hi-Fi sound-box for computer, comprise power supply, loud speaker, first resistance is to the 7th resistance, first electric capacity is to the 7th electric capacity, amplifier and potentiometer, the positive pole of described power supply respectively with the first end of described second electric capacity, the described first end of the 3rd electric capacity is connected with the cathode power supply end of described amplifier, described power cathode respectively with the first end of described second resistance, the first end of described 3rd resistance, the first end of described 4th electric capacity, the first end of described 5th electric capacity, the negative electricity source of described amplifier, the first end of described 6th resistance, the first end of described potentiometer is connected with the first end of described 7th electric capacity, second end of described second electric capacity is connected with the second end of described second resistance, second end of described 3rd electric capacity is connected with the second end of described 3rd resistance, the output of described amplifier respectively with the first end of described 4th resistance, the first end of described first resistance is connected with the first end of described loud speaker, second end of described first resistance is connected with the first end of described first electric capacity, second end of described first electric capacity respectively with the second end of described loud speaker, second end of described 4th electric capacity is connected with the second end of described 5th electric capacity, the inverting input of described amplifier is connected with the second end of described 4th resistance and the first end of described 7th resistance respectively, the in-phase input end of described amplifier is connected with the first end of described 5th resistance, second end of described 5th resistance is connected with the second end of described 6th resistance and the first end of described 6th electric capacity respectively, second end of described 6th electric capacity is connected with the sliding end of described potentiometer, second end of described potentiometer is the audio signal input end of described audio amplifier, second end of described 7th resistance is connected with the second end of described 7th electric capacity.
Beneficial effect of the present invention is:
The present invention is a kind of Hi-Fi sound-box for computer; this audio amplifier has the advantage that structure is simple and power consumption is low; and the audio signal fidelity degree that this audio amplifier exports is high; sense of hearing is good; first resistance and the first electric capacity composition RC network; the RC network of this audio amplifier can prevent low frequency self-excitation, protection loudspeaker and amplifier.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of a kind of Hi-Fi sound-box for computer of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1, a kind of Hi-Fi sound-box for computer of the present invention, comprise power supply E, loud speaker BL, first resistance R1 is to the 7th resistance R7, first electric capacity C1 is to the 7th electric capacity C7, amplifier IC and potentiometer RP, the positive pole of power supply E respectively with the first end of the second electric capacity C2, the first end of the 3rd electric capacity C3 is connected with the cathode power supply end of amplifier IC, power supply E negative pole respectively with the first end of the second resistance R2, the first end of the 3rd resistance R3, the first end of the 4th electric capacity C4, the first end of the 5th electric capacity C5, the negative electricity source of amplifier IC, the first end of the 6th resistance R6, the first end of potentiometer RP is connected with the first end of the 7th electric capacity C7, second end of the second electric capacity C2 is connected with second end of the second resistance R2, second end of the 3rd electric capacity C3 is connected with second end of the 3rd resistance R3, the output of amplifier IC respectively with the first end of the 4th resistance R4, the first end of the first resistance R1 is connected with the first end of loud speaker BL, second end of the first resistance R1 is connected with the first end of the first electric capacity C1, second end of the first electric capacity C1 respectively with second end of loud speaker BL, second end of the 4th electric capacity C4 is connected with second end of the 5th electric capacity C5, the inverting input of amplifier IC is connected with second end of the 4th resistance R4 and the first end of the 7th resistance R7 respectively, the in-phase input end of amplifier IC is connected with the first end of the 5th resistance R5, second end of the 5th resistance R5 is connected with second end of the 6th resistance R6 and the first end of the 6th electric capacity C6 respectively, second end of the 6th electric capacity C6 is connected with the sliding end of potentiometer RP, second end of potentiometer RP is the audio signal input end of audio amplifier, second end of the 7th resistance R7 is connected with second end of the 7th electric capacity C7.
Operation principle of the present invention is as follows:
The impedance of potentiometer RP is larger, because the general value of computer sound card audio frequency capacity output is less, input impedance is larger, low frequency end response can be more better, audio signal input end obtains audio signal from the voice band line output socket of computer, audio signal is input to the in-phase input end of amplifier IC by coupling capacitance C6, amplifier IC, 4th electric capacity C4, 5th electric capacity C5, 7th electric capacity C7, 4th resistance R4 and the 7th resistance R7 forms amplifying circuit, the resistance changing the 4th resistance R4 can change the amplification quantity of sound equipment, the larger gain of resistance is higher, to obtain sensitivity and the amplification coefficient of suitable all kinds of computers, the output of amplifier IC exports the audio signal after amplifying, by after the RC network that is made up of the first resistance R1 and the first electric capacity C1, input loudspeaker BL, RC network can prevent low frequency self-excitation, protection loudspeaker and amplifier IC.
Claims (1)
1. the Hi-Fi sound-box for computer, it is characterized in that: comprise power supply, loud speaker, first resistance is to the 7th resistance, first electric capacity is to the 7th electric capacity, amplifier and potentiometer, the positive pole of described power supply respectively with the first end of described second electric capacity, the described first end of the 3rd electric capacity is connected with the cathode power supply end of described amplifier, described power cathode respectively with the first end of described second resistance, the first end of described 3rd resistance, the first end of described 4th electric capacity, the first end of described 5th electric capacity, the negative electricity source of described amplifier, the first end of described 6th resistance, the first end of described potentiometer is connected with the first end of described 7th electric capacity, second end of described second electric capacity is connected with the second end of described second resistance, second end of described 3rd electric capacity is connected with the second end of described 3rd resistance, the output of described amplifier respectively with the first end of described 4th resistance, the first end of described first resistance is connected with the first end of described loud speaker, second end of described first resistance is connected with the first end of described first electric capacity, second end of described first electric capacity respectively with the second end of described loud speaker, second end of described 4th electric capacity is connected with the second end of described 5th electric capacity, the inverting input of described amplifier is connected with the second end of described 4th resistance and the first end of described 7th resistance respectively, the in-phase input end of described amplifier is connected with the first end of described 5th resistance, second end of described 5th resistance is connected with the second end of described 6th resistance and the first end of described 6th electric capacity respectively, second end of described 6th electric capacity is connected with the sliding end of described potentiometer, second end of described potentiometer is the audio signal input end of described audio amplifier, second end of described 7th resistance is connected with the second end of described 7th electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310572452.2A CN104640010A (en) | 2013-11-15 | 2013-11-15 | High-fidelity loudspeaker box for computers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310572452.2A CN104640010A (en) | 2013-11-15 | 2013-11-15 | High-fidelity loudspeaker box for computers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104640010A true CN104640010A (en) | 2015-05-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310572452.2A Pending CN104640010A (en) | 2013-11-15 | 2013-11-15 | High-fidelity loudspeaker box for computers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104640010A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533369A (en) * | 2016-12-05 | 2017-03-22 | 成都小晓学教育咨询有限公司 | Audio signal amplification circuit |
-
2013
- 2013-11-15 CN CN201310572452.2A patent/CN104640010A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533369A (en) * | 2016-12-05 | 2017-03-22 | 成都小晓学教育咨询有限公司 | Audio signal amplification circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150520 |