CN2840162Y - Electronic device with suppressing electromagnetic wave radiation of audio frequency signal - Google Patents
Electronic device with suppressing electromagnetic wave radiation of audio frequency signal Download PDFInfo
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- CN2840162Y CN2840162Y CN 200520046035 CN200520046035U CN2840162Y CN 2840162 Y CN2840162 Y CN 2840162Y CN 200520046035 CN200520046035 CN 200520046035 CN 200520046035 U CN200520046035 U CN 200520046035U CN 2840162 Y CN2840162 Y CN 2840162Y
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Abstract
The utility model discloses an electronic device with an audio frequency signal electromagnetic wave radiation suppression function, which comprises a circuit board, a fixed part and an analog signal ground, wherein the circuit board comprises an audio module with an audio function; the fixed part is arranged on the circuit board; the analog signal ground is arranged on the circuit board and is electrically connected with the fixed part, and an earth signal of the audio module is connected to the analog signal ground. Noise signals generated by the audio module can be rapidly transmitted to a machine case through the fixed part, the combined action of the noise signals and audio signals is avoided, and electromagnetic waves with great energy are radiated.
Description
Technical field
The utility model relates to a kind of electronic installation that suppresses electromagenetic wave radiation, particularly relates in a kind of electronic installation with sound signal, makes sound signal ground connection reach the technology of the electromagenetic wave radiation that suppresses sound signal.
Background technology
With the computer is that example illustrates.The function of computer is more and more, multimedia function particularly, develop into multichannels such as five-sound channel of today by former monophony, two-channel, computer play multimedia files of today is sent stereoly more allows the user feel as coming to concert, cinema etc. personally.Therefore, for satisfying the growing multimedia function of computer, the requirement of computer being play the quality of the sound that media file is produced also must improve.
In computer, realize the part of human-computer interaction audio function, be the audio-frequency module of forming by electronic circuit and electronic devices and components (Audio Module) of the mainboard (Main Board) of computer.Under the condition of same hardware, to disturb more for a short time, the quality of the sound that audio-frequency module produces is good more.Simultaneously, talk about publicly known, in computer main board, have two kinds of signals: a kind of is digital signal (Digital Signal), such as representing 1 with noble potential, electronegative potential represents 0, is 0 and 1 logical signal of forming, there is not electromagnetic interference (EMI) between this digital signal, so be widely used in the various circuit boards; Another kind is simulating signal (Analog Signal), as the sound signal in the above-mentioned audio-frequency module.For the phase mutual interference is avoided in the various components and parts work interconnection in the realization mainboard, so in mainboard, be provided with a digital signal ground (Digital Ground, AGNG or GND), this is the public ground in the mainboard, and another simulating signal ground (Analog Ground, AGND); Adopt the components and parts of digital signal work to be connected, adopt the components and parts of simulating signal work, such as audio-frequency module, with simulating signal ground (AGND) with digital signal ground (GND); Generally speaking, simulating signal ground (AGND) is connected with digital signal ground (GND) after connecting an inductance.
But computer of today has, and direction little towards volume, ultra-thin and ultra-light develops, so the surface area of the mainboard of computer is also more and more littler, make the electronic circuit distribution in the mainboard compacter, and the space of staying for above-mentioned simulating signal ground (AGND) is littler.With the audio-frequency module is example, when audio-frequency module is in running order, the noise that simulating signal in the electronic circuit produces in transmission course (Noise), signal can't transfer to digital signal ground (GND) by this simulating signal ground (AGND) timely and effectively, so the quality of the sound signal of the serious interference tones module output of noise signal possibility; Simultaneously, this noise signal also may produce coupling altogether with sound signal, provides interface element radiation that the user the uses electromagnetic wave than macro-energy via audio-frequency module.
Summary of the invention
For addressing the above problem, the utility model has disclosed a kind of electronic installation with the electromagenetic wave radiation that suppresses sound signal, its energy effectively overcoming noise makes the electromagnetic wave energy of sound signal radiation less to the interference of sound signal simultaneously, meets relevant industrywide standard.
For reaching above-mentioned purpose, the utility model adopts following technical scheme to realize: a kind of electronic installation with the electromagenetic wave radiation that suppresses sound signal, and this electronic installation comprises: a circuit board, it comprises that one has the audio-frequency module of audio-frequency function; One fixed part is arranged on the foregoing circuit plate; One simulating signal ground (AGND) is arranged on the foregoing circuit plate, and itself and said fixing portion electrically connect, and the earth signal of above-mentioned audio-frequency module is connected to this simulating signal ground.
Owing to adopted as above technical scheme, in the utility model, because simulating signal ground is connected with fixed part on the foregoing circuit plate, make noise signal transmission to this simulating signal ground, need not eliminate by transferring to digital signal ground again, but directly conduct to cabinet rapidly via simulating signal ground, therefore can effectively avoid noise signal to be detained is transmitted in the above-mentioned audio-frequency module, so noise can't produce coupling altogether with the sound signal of above-mentioned audio-frequency module output, therefore, less from the electromagnetic wave energy that this above-mentioned audio-frequency module radiate, can meet the industry relevant regulations.
Description of drawings
Fig. 1 is the circuit diagram of the electronic installation that the utility model disclosed.
Embodiment
Please refer to Fig. 1, be the circuit board synoptic diagram of the electronic installation that the utility model disclosed with the electromagenetic wave radiation that suppresses sound signal.Electronic installation of the present utility model has audio-frequency function, and such as computer, the mainboard of computer has the audio-frequency module of realizing audio-frequency function.Below be that example further describes with the synoptic diagram that Figure 1 shows that computer main board, the circuit board 100 of electronic installation promptly shown in Figure 1 is the mainboard 100 of computer.
On the mainboard 100 of computer, comprise that one realizes the audio-frequency module 110 of audio-frequency function, this audio-frequency module 110 is made up of the electronic circuit and the electronic devices and components that are arranged on the mainboard 110; By, this audio-frequency module comprises that also one connects unit 112, and it can be a connector (Connector), and the user controls by this linkage unit 112 and uses this audio-frequency module 110, after such as the user sound equipment, earphone being plugged in above-mentioned connection unit 112, controlling and use above-mentioned audio-frequency module.
For audio-frequency module 110 is avoided interference, have preferable audio quality, on above-mentioned mainboard 110, be provided with a zone and be simulating signal ground (Analog GND, AGND) 120.Simultaneously, on the above-mentioned mainboard 100, be provided with a plurality of fixed parts 130, by retaining element mainboard 100 be fixed in the cabinet, said fixing portion 130 can be a screw hole, by screw above-mentioned mainboard 100 is fixed in the cabinet.The above-mentioned simulating signal ground 120 and the fixed part 130 of close above-mentioned audio-frequency module 110 are electrically connected, the noise signal that in processes such as transmission, signal be mutual, produces when the electronic circuit of above-mentioned audio-frequency module 110, can be rapidly via behind the above-mentioned simulating signal ground 120, and import on the cabinets by said fixing portion 130.
In addition, owing to can not produce interference between the digital signal, so most of electronic circuits are transmission of digital signals in the mainboard 100, therefore, generally when the wiring (Layout) and the manufacturing, wherein one deck that mainboard 100 can be set is digital signal ground (Digital Ground, DGNG or GND) 140, and this is 100 public ground in the mainboard.The earth signal of set various electronic devices and components can be connected to this digital signal ground 140 by multiple modes such as via hole, blind hole, half buried via holes in the mainboard 100.And above-mentioned simulating signal ground 120 is connected with digital signal ground 140 after connecting an inductance (not shown).
When above-mentioned audio-frequency module 110 is in running order, because its ground path is connected with above-mentioned simulating signal ground 120, the undesired signal that ground path produces can be via conducting to cabinet rapidly behind this simulating signal ground 120, therefore the generation of noise signal in the time of can effectively avoiding above-mentioned audio-frequency module 110 to work is simultaneously so make above-mentioned audio-frequency module 110 have preferable audio signal quality.
In sum, in the utility model, because simulating signal ground 120 is connected with fixed part 130 on the above-mentioned mainboard 100, make noise signal transmission to this simulating signal ground 120, need not eliminate by transferring to digital signal ground 140 again, but directly conduct to cabinet rapidly via simulating signal ground 120, therefore can effectively avoid noise signal to be detained is transmitted in the above-mentioned audio-frequency module 110, so noise can't produce coupling altogether with the sound signal of above-mentioned audio-frequency module 110 outputs, therefore, less from the electromagnetic wave energy that this above-mentioned audio-frequency module 110 radiate, can meet the industry relevant regulations.
Claims (4)
1. electronic installation with the electromagenetic wave radiation that suppresses sound signal, this electronic installation comprises:
One circuit board, it comprises that one has the audio-frequency module of audio-frequency function;
One fixed part is arranged on the foregoing circuit plate, it is characterized in that, also comprises;
One simulating signal ground (AGND) is arranged on the foregoing circuit plate, and itself and said fixing portion electrically connect, and the earth signal of above-mentioned audio-frequency module is connected to this simulating signal ground.
2. the electronic installation with the electromagenetic wave radiation that suppresses sound signal as claimed in claim 1 is characterized in that the foregoing circuit plate also comprises digital signal ground (GND).
3. the electronic installation with the electromagenetic wave radiation that suppresses sound signal as claimed in claim 2 is characterized in that, above-mentioned simulating signal ground is connected with above-mentioned digital signal ground after being connected in series an inductance.
4. the electronic installation with the electromagenetic wave radiation that suppresses sound signal as claimed in claim 2 is characterized in that above-mentioned electronic installation is a computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520046035 CN2840162Y (en) | 2005-10-28 | 2005-10-28 | Electronic device with suppressing electromagnetic wave radiation of audio frequency signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520046035 CN2840162Y (en) | 2005-10-28 | 2005-10-28 | Electronic device with suppressing electromagnetic wave radiation of audio frequency signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2840162Y true CN2840162Y (en) | 2006-11-22 |
Family
ID=37428141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520046035 Expired - Fee Related CN2840162Y (en) | 2005-10-28 | 2005-10-28 | Electronic device with suppressing electromagnetic wave radiation of audio frequency signal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2840162Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102340926A (en) * | 2010-07-26 | 2012-02-01 | 鸿富锦精密工业（深圳）有限公司 | Printed circuit board |
| CN107734430A (en) * | 2017-10-27 | 2018-02-23 | 郑州云海信息技术有限公司 | A kind of ESS voicefrequency circuits denoising structure and noise-reduction method |
-
2005
- 2005-10-28 CN CN 200520046035 patent/CN2840162Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102340926A (en) * | 2010-07-26 | 2012-02-01 | 鸿富锦精密工业（深圳）有限公司 | Printed circuit board |
| CN107734430A (en) * | 2017-10-27 | 2018-02-23 | 郑州云海信息技术有限公司 | A kind of ESS voicefrequency circuits denoising structure and noise-reduction method |
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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: 20061122 Termination date: 20091130 |