CN216700294U - Sound card audio frequency regulating circuit and external sound card - Google Patents
Sound card audio frequency regulating circuit and external sound card Download PDFInfo
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- CN216700294U CN216700294U CN202123295934.7U CN202123295934U CN216700294U CN 216700294 U CN216700294 U CN 216700294U CN 202123295934 U CN202123295934 U CN 202123295934U CN 216700294 U CN216700294 U CN 216700294U
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Abstract
The utility model discloses a sound card audio frequency adjusting circuit and an external sound card, wherein the sound card audio frequency adjusting circuit comprises a signal input end, a signal adjusting end and a signal output end, the signal input end, the signal adjusting end and the signal output end are sequentially connected, the signal adjusting end comprises a high-frequency intermediate-frequency adjusting module circuit, an intermediate-frequency adjusting module circuit and a low-frequency intermediate-frequency adjusting module circuit, and the high-frequency intermediate-frequency adjusting module circuit, the intermediate-frequency adjusting module circuit and the low-frequency intermediate-frequency adjusting module circuit are respectively connected with the signal output end for outputting.
Description
Technical Field
The utility model relates to audio processing hardware, in particular to a sound card audio adjusting circuit and an external sound card.
Background
A Sound Card (Sound Card), also called audio Card, is the most basic component in a computer multimedia system, and is a hardware for implementing Sound wave/digital signal interconversion. The basic function of the sound card is to convert the original sound signals from a microphone, a magnetic tape and an optical disk and output the converted signals to sound equipment such as an earphone, a loudspeaker, a recorder and the like, or to send out the sound of a synthesized musical instrument through a digital interface (MIDI) of the music equipment.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provide a sound card audio regulating circuit and an external sound card with reasonable structural design.
The technical scheme adopted by the utility model for solving the problems is as follows: the utility model provides a sound card audio frequency regulating circuit, includes signal input part, signal conditioning end and signal output part, signal input part, signal conditioning end and signal output part connect gradually, signal conditioning end including high frequency intermediate frequency adjusting module circuit, intermediate frequency adjusting module circuit and low frequency intermediate frequency adjusting module circuit respectively, high frequency intermediate frequency adjusting module circuit, intermediate frequency adjusting module circuit and low frequency intermediate frequency adjusting module circuit insert signal output part and export, this sound card audio frequency regulating circuit adjusts the high-middle-low frequency of incoming signal for form high-middle-low frequency three routes signal and export the high-middle-low frequency signal of handling, adjust the output according to playback devices's configuration and user's signal.
And further: high frequency intermediate frequency adjust module circuit, intermediate frequency adjust module circuit and low frequency intermediate frequency adjust module circuit be and connect in parallel on signal input part and signal output, high frequency intermediate frequency adjust module circuit adjust resistance R1 and electric capacity C1 connect gradually, intermediate frequency adjust module circuit including adjusting resistance R2 and electric capacity C2, low frequency intermediate frequency adjust module circuit including adjusting module circuit R3, balancing resistance R4 with impedance L1.
And further: the adjusting resistor R1, the adjusting resistor R2 and the adjusting resistor R3 adopt a torsion adjusting resistor.
The utility model provides an adopt above-mentioned sound card audio frequency regulating circuit's external sound card, includes data interface module, DA conversion circuit, sound card audio frequency regulating circuit, multichannel analog switch, speaker group and audio frequency processing chip, data interface module, DA conversion circuit and sound card audio frequency regulating circuit connect gradually, sound card audio frequency regulating circuit's signal output part connect speaker group and audio frequency processing chip respectively through multichannel analog switch, the audio frequency processing chip be provided with the audio output interface.
Further: the data interface module and the audio output interface comprise any one or combination of RAX, SPDIF, USB and HDMI protocol interfaces.
Further: the data interface module is also provided with an MIC input interface.
Compared with the prior art, the utility model has the following advantages and effects: the circuit related by the utility model can be adaptively adjusted according to the configuration, playing occasions and audio playing types of the loudspeakers corresponding to the middle-high frequency and the low frequency of the playing equipment, and can obtain various levels of audio effects through adjustment processing, so that the application range is wide.
Drawings
Fig. 1 is a circuit diagram of an audio conditioning circuit of a sound card according to an embodiment of the present invention.
Fig. 2 is a block diagram of a configuration of an external sound card according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of an integrated housing layout structure according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Referring to fig. 1 to 3, the sound card audio adjusting circuit of this embodiment includes a signal input terminal, a signal adjusting terminal, and a signal output terminal, where the signal input terminal, the signal adjusting terminal, and the signal output terminal are sequentially connected, the signal adjusting terminal includes a high-frequency intermediate-frequency adjusting module circuit, an intermediate-frequency adjusting module circuit, and a low-frequency intermediate-frequency adjusting module circuit, and the high-frequency intermediate-frequency adjusting module circuit, the intermediate-frequency adjusting module circuit, and the low-frequency intermediate-frequency adjusting module circuit are connected to the signal output terminal to output Intermediate frequency adjusts module circuit and low frequency intermediate frequency and adjusts module circuit and be parallelly connected on signal input end and signal output, high frequency intermediate frequency adjust module circuit adjust resistance R1 and electric capacity C1 and connect gradually, intermediate frequency adjust module circuit including adjusting resistance R2 and electric capacity C2, low frequency intermediate frequency adjust module circuit include that adjust module circuit R3, balancing resistance R4 are with impedance L1, in this embodiment, carry out signal conditioning to high-medium low frequency through three group adjusting resistance R1, R2 and R3 respectively, as shown in the figure: the resistance of R3 is gradually adjusted to be small while keeping R1 and R2 unchanged, so that the impedance of the circuit is reduced, the low-frequency volume is gradually increased, and a good dynamic effect can be obtained by matching with a subwoofer loudspeaker device; keeping R1 unchanged, when synchronously adjusting R2 and R3 to be smaller, the impedance of the medium and low frequencies is smaller, so that the audio frequency of the medium and low frequencies is synchronously increased, the high frequency is in the condition of gradually attenuating the output, after the high and low loudspeakers are adapted appropriately, the low-frequency dynamic effect is obtained, meanwhile, clear medium-frequency sound can be obtained, and the high-frequency effect is soft; keeping R2 and R3 unchanged, when the resistance of R1 is gradually adjusted to be small, the impedance of a high-frequency part is reduced, the adjusted signal is adapted to a proper middle-high-low loudspeaker, the high-frequency signal is output abundantly, the middle-low frequency signal attenuation is obtained, the moderate middle-low frequency is obtained, and the low-low frequency audio-frequency audio-frequency-emphasis music-frequency-middle-frequency; when R1, R2 and R3 are synchronously pushed to the maximum resistance, the middle-high frequency signals and the low-frequency signals are balanced, the method is suitable for audio frequency adjustment output with low thrust of a front-end sound source device, when R1 and R2 are turned down, R3 is synchronously adjusted, high-frequency impedance is reduced, high-frequency signals are increased, low-frequency and intermediate-frequency attenuation output is performed, the middle-high frequency and the low-frequency in sound output by the playing device are clear and pleasant, the low-frequency and intermediate-frequency are gradually softened, the method is suitable for the use environment with poor low-tone performance or the output of high-frequency sound with clear emphasis, when R1 and R2 are adjusted to be maximum, R3 is turned down gradually, the middle-high frequency and the low-frequency attenuation output are performed, the middle-high frequency and the low-frequency signals output by the playing device are clear and soft, the method is suitable for the environment with much dislike of low-tone performance or the environment with one-level poor high-frequency sound with high-tone high-frequency sound with emphasis, when R1 and R3 are adjusted to be maximum, R2 is turned down gradually turned down, the low-frequency output is increased, the low-frequency and high-frequency output is adjusted gradually, the low-frequency output is increased, the circuit related to the embodiment can be adaptively adjusted according to the configuration, the playing occasion and the type of played audio of the loudspeaker corresponding to the middle-high frequency of the playing equipment, and can obtain various levels of audio effects through adjustment processing, so that the application range is wide.
Example 2:
based on the above circuit structure, the present embodiment relates to an external sound card using the above sound card audio adjusting circuit, which includes a data interface module 3, a D/a converting circuit, a sound card audio adjusting circuit, a multi-channel analog switch, a speaker group 2 and an audio processing chip, where the data interface module, the D/a converting circuit and the sound card audio adjusting circuit are sequentially connected, a signal output end of the sound card audio adjusting circuit is respectively connected to the speaker group (the speaker group is a speaker built in an equipment housing, and has three high, medium and low frequency groups built in, so as to ensure the display of the basic functions of the equipment) and the audio processing chip (in the present embodiment, the audio processing chip can use a common DSP audio processing chip, such as a TMS 320 series chip), the audio processing chip is provided with an audio output interface 4, in the structure, the external sound card is connected with sound source equipment through the data interface module to input sound signals, and through adjustment processing, the multi-path analog switch realizes the input of multi-path analog quantity, and simultaneously can control and switch the loudspeaker built in the sound card to play, or switch the sound card to the audio processing chip to carry out analog-to-digital conversion and access the playing with richer performance configuration (the loudspeaker quantity configuration, the power and the like) of the external loudspeaker, so as to obtain better experience effect. The use occasion is various, constitutes simple structure relatively, can integrate and make product compact structure with the casing, as shown in fig. 3, portable can connect external playback devices simultaneously, has good expansibility.
The above description of the present invention is intended to be illustrative. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the utility model as defined in the accompanying claims.
Claims (6)
1. A sound card audio conditioning circuit, characterized by: including signal input part, signal conditioning end and signal output part, signal input part, signal conditioning end and signal output part connect gradually, signal conditioning end including respectively including high frequency intermediate frequency adjusting module circuit, intermediate frequency adjusting module circuit and low frequency intermediate frequency adjusting module circuit, high frequency intermediate frequency adjusting module circuit, intermediate frequency adjusting module circuit and low frequency intermediate frequency adjusting module circuit insert signal output part and export.
2. The sound card audio conditioning circuit of claim 1, wherein: high frequency intermediate frequency adjust module circuit, intermediate frequency adjust module circuit and low frequency intermediate frequency adjust module circuit be and connect in parallel on signal input part and signal output, high frequency intermediate frequency adjust module circuit adjust resistance R1 and electric capacity C1 and connect gradually, intermediate frequency adjust module circuit including adjusting resistance R2 and electric capacity C2 and connect gradually, low frequency intermediate frequency adjust module circuit including adjust module circuit R3, balancing resistance R4 with impedance L1 and connect gradually.
3. The sound card audio conditioning circuit of claim 2, wherein: the adjusting resistor R1, the adjusting resistor R2 and the adjusting resistor R3 adopt a torsion adjusting resistor.
4. An external sound card formed by the sound card audio conditioning circuit of any one of claims 1 to 3, wherein: including data interface module, DA conversion circuit, sound card audio frequency regulating circuit, multichannel analog switch, speaker group and audio frequency processing chip, data interface module, DA conversion circuit and sound card audio frequency regulating circuit connect gradually, sound card audio frequency regulating circuit's signal output part connect speaker group and audio frequency processing chip respectively through multichannel analog switch, the audio frequency processing chip be provided with audio output interface.
5. The external sound card of claim 4, wherein: the data interface module and the audio output interface comprise any one or combination of RAX, SPDIF, USB and HDMI protocol interfaces.
6. The external sound card of claim 4, wherein: the data interface module is also provided with an MIC input interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123295934.7U CN216700294U (en) | 2021-12-24 | 2021-12-24 | Sound card audio frequency regulating circuit and external sound card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123295934.7U CN216700294U (en) | 2021-12-24 | 2021-12-24 | Sound card audio frequency regulating circuit and external sound card |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216700294U true CN216700294U (en) | 2022-06-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123295934.7U Active CN216700294U (en) | 2021-12-24 | 2021-12-24 | Sound card audio frequency regulating circuit and external sound card |
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| Country | Link |
|---|---|
| CN (1) | CN216700294U (en) |
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2021
- 2021-12-24 CN CN202123295934.7U patent/CN216700294U/en active Active
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