CN201066835Y - Digital multimedia sound amplification circuit - Google Patents
Digital multimedia sound amplification circuit Download PDFInfo
- Publication number
- CN201066835Y CN201066835Y CNU2007200640431U CN200720064043U CN201066835Y CN 201066835 Y CN201066835 Y CN 201066835Y CN U2007200640431 U CNU2007200640431 U CN U2007200640431U CN 200720064043 U CN200720064043 U CN 200720064043U CN 201066835 Y CN201066835 Y CN 201066835Y
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- CN
- China
- Prior art keywords
- power amplifier
- digital multimedia
- utility
- amplifier
- multimedia sound
- 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.)
- Expired - Fee Related
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- Amplifiers (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
Abstract
The utility model discloses an amplifying circuit of a digital multimedia sound, comprises an audio passband filter, a toning circuit and a power amplifier. The audio passband filter, the toning circuit and the power amplifier are successively connected in series. The input end of the audio passband filter is connected with a signal input end. The output end of the power amplifier is connected with a loudspeaker. The utility model uses the audio passband filter to filter out high frequency signals of unsound frequency band in input signals of a low frequency amplifier to maintain the working characteristics of the amplifier within the linear range and improve the sound acoustics and the fidelity.
Description
Technical field
The utility model relates to a kind of amplifying circuit of digital multimedia sound equipment.
Background technology
The structure of the amplifying circuit of existing digital multimedia sound equipment is composed in series by tuning circuit and power amplifier as shown in Figure 1.But along with the digital multimedia broad application, the raising of computer frequency, the radio-frequency pollution that colonizes in the audio signal is also more serious, and crosstalking of high-frequency signal directly has influence on the operate as normal of bass electronic device, thereby influences the raising of tonequality.
The utility model content
For the amplifying circuit that overcomes existing digital multimedia sound equipment is subject to colonize in the technical problem of the radiofrequency signal influence in the audio signal, the utility model provide a kind of simple in structure, and can effectively eliminate the amplifying circuit that colonizes in the radiofrequency signal in the audio signal.
The technical scheme that the utility model solves the problems of the technologies described above is: comprise power amplifier, it is characterized in that: also comprise the audio frequency pass filter, described audio frequency pass filter is serially connected with the input of power amplifier.
In the amplifying circuit of above-mentioned digital multimedia sound equipment, also be included in the tuning circuit, the tuning circuit is serially connected with between the input of the output of audio frequency pass filter and power amplifier.
Technique effect of the present utility model is: the utility model is at audio frequency pass filter of input serial connection of traditional audifier, enter amplifier with the high-frequency signal that stops non-voiceband, make the operating characteristic of amplifier remain on linear working range, thereby reach the purpose of improving the tonequality fidelity.
Following accompanying drawing is further described the utility model.
Description of drawings
Fig. 1 is the structure chart of existing audio amplification circuit.
Fig. 2 is a structure chart of the present utility model.
Embodiment
Referring to Fig. 2, the utility model is by audio frequency pass filter, tuning circuit, power amplifier, described audio frequency pass filter, tuning circuit, power amplifier are connected in series successively, the input termination signal input part of audio frequency pass filter, the output termination loud speaker of power amplifier, the audio frequency pass filter can be with the high-frequency signal filtering of the non-voiceband in the low frequency amplifier input signal, make the operating characteristic of amplifier remain on linear working range, thereby reach the purpose of improving the tonequality fidelity.
Claims (2)
1. the amplifying circuit of a digital multimedia sound equipment comprises power amplifier, it is characterized in that: also comprise the audio frequency pass filter, described audio frequency pass filter is serially connected with the input of power amplifier.
2. the amplifying circuit of digital multimedia sound equipment according to claim 1 is characterized in that: also be included in the tuning circuit, the tuning circuit is serially connected with between the input of the output of audio frequency pass filter and power amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200640431U CN201066835Y (en) | 2007-08-03 | 2007-08-03 | Digital multimedia sound amplification circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200640431U CN201066835Y (en) | 2007-08-03 | 2007-08-03 | Digital multimedia sound amplification circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201066835Y true CN201066835Y (en) | 2008-05-28 |
Family
ID=39484020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200640431U Expired - Fee Related CN201066835Y (en) | 2007-08-03 | 2007-08-03 | Digital multimedia sound amplification circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201066835Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107613430A (en) * | 2017-08-02 | 2018-01-19 | 深圳天珑无线科技有限公司 | A kind of speaker circuit and mobile terminal |
-
2007
- 2007-08-03 CN CNU2007200640431U patent/CN201066835Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107613430A (en) * | 2017-08-02 | 2018-01-19 | 深圳天珑无线科技有限公司 | A kind of speaker circuit and mobile terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080528 Termination date: 20110803 |