CN104796821A - Audio signal assisting device - Google Patents
Audio signal assisting device Download PDFInfo
- Publication number
- CN104796821A CN104796821A CN201510224831.1A CN201510224831A CN104796821A CN 104796821 A CN104796821 A CN 104796821A CN 201510224831 A CN201510224831 A CN 201510224831A CN 104796821 A CN104796821 A CN 104796821A
- Authority
- CN
- China
- Prior art keywords
- audio signal
- resistance
- direct current
- current level
- multitask
- 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
Links
Landscapes
- Amplifiers (AREA)
Abstract
The invention relates to the technical field of audio signals, in particular to an audio signal assisting device. The audio signal assisting device comprises multiple first priority processing modules, multiple first audio signal processing devices, a first multitask selector, multiple first secondary processing modules, multiple second priority processing modules, multiple second secondary processing modules and a second multitask selector. Audio signals are switched by a direct-current level filter circuit and a direct-current level regulation circuit matched with a chip, generation of sonic boom and interference noise is avoided, besides service life of the assisting device is prolonged, and bounce sparks or surge is prevented from being generated to damage the device.
Description
Technical field
The present invention relates to audio signal technical field, more specifically, relate to a kind of audio signal servicing unit.
Background technology
Due to the fast development of information technology, make the application of computer and Related product thereof quite universal.Computer user usually utilizes mouse and keyboard etc. to input relevant apparatus and operates computer, computer exports relevant apparatus by monitor or loudspeaker etc., computer situation be presented at monitor or utilize sound to indicate, making computer user can grasp the real time status of computer at any time.Sometimes in order to meet the different needs, user may have the computer of more than to process all kinds of different thing.Traditionally, every platform computer all should be equipped with one group input export relevant apparatus, such as keyboard, mouse, monitor and loudspeaker etc., but this configuration mode but extremely sinks money and space.
On the other hand, large-scale system dealer or middle-size and small-size Intranet, usually have thousands of or server to minority platform at most, and every station server all needs to use monitor, and keyboard and mouse are to need as administrative institute.But in fact when using server, but seldom need to use these inputs export relevant apparatus, most time, server does not need the person of being managed to control.Therefore, in this case, every station server uses individual other group input output relevant apparatus to be unnecessary nor synthesizes this, and more can cause the waste in space.
So a servicing unit, use one group input export relevant apparatus to manage the device of multiple stage computer, solve such problem.Use servicing unit not only to solve the problem of expense, more solve the problem in equipment and space, also can overcome the compatibility issue of distinct interface simultaneously.
But the audio signal servicing unit of prior art, its performance when audio signal switches is also bad.For example, the direct current level of each sound card institute output audio signal is not identical, if the audio signal of different first processing unit has different direct current levels, then easy when it switches produce sonic boom.Moreover if servicing unit also processes the I/O relevant apparatus of other high power consumptions simultaneously, then now a large amount of power consumptions can make the direct current level in whole servicing unit float, and this can make audio signal occur the problem of interference tones.
In addition, the mechanical relay of the many uses of audio signal servicing unit of prior art switches.But mechanical servicing unit, its mechanical endurance is limited, and durability is not high, and easily produces spring spark when switching, and makes audio signal servicing unit fault or even produce surging and the precision components that injures in computer.
Therefore object of the present invention is providing a kind of audio signal servicing unit exactly, the direct current level of adjustment audio signal, the audio signal direct current level at multitask selector two ends is made to remain fixing, so to avoid producing sonic boom because level difference when switched audio signal, or produce the problem of interference tones because of the load of other high power consumptions.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of audio signal servicing unit is provided.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of audio signal servicing unit is provided, at least one audio signal output device is shared for multiple first audio signal processor, described audio signal servicing unit at least comprises: multiple first priority treatment module, connect described multiple first audio signal processor, wherein multiple first priority treatment module described in each receives one first audio signal from the first audio signal processor connected, and adjust direct current level to the one first predefined parameter value of described first audio signal, and obtain one second audio signal, one first multitask selector, from described multiple first priority treatment module receive described second audio signal, and select described second audio signal one of them for output, and one first secondary processing module, receive by described second audio signal selected, and adjust by the direct current level extremely described first predefined parameter value of described second audio signal selected, and obtain one the 3rd audio signal, wherein described in each, multiple first priority treatment module comprises one first direct current level filtering circuit, in order to the direct current level of the first audio signal described in filtering, and one first direct current level regulator circuit, described first audio signal of filtering direct current level is received from described first direct current level filtering circuit, and adjust the direct current level of described first audio signal of filtering direct current level to described first predefined parameter value, and described first secondary processing module comprises one second direct current level regulator circuit, receive by described second audio signal selected from described first multitask selector, and adjust by the direct current level extremely described first predefined parameter value of described second audio signal selected, and one second direct current level filtering circuit, described second audio signal of adjusted direct current level is received from described second direct current level regulator circuit, and the direct current level of described first audio signal of filtering adjusted direct current level,
Wherein said first direct current level regulator circuit comprises one first resistance and one second resistance, one end and a high potential of described first resistance are electrically connected, the other end of described first resistance and one end of described second resistance are electrically connected, and the other end of described second resistance is connected with an electronegative potential, and described second direct current level regulator circuit comprises one the 3rd resistance and one the 4th resistance, one end and the described high potential of described 3rd resistance are electrically connected, the other end of described 3rd resistance and one end of described 4th resistance are electrically connected, and the other end of described 4th resistance and described electronegative potential are electrically connected.
Wherein said audio signal servicing unit also shares at least one Audio signal input device for multiple second audio signal processor, described audio signal servicing unit also comprises: one second priority treatment module, connect described Audio signal input device, wherein said second priority treatment module receives one the 4th audio signal from described Audio signal input device, and adjust described 4th audio signal and obtain direct current level to one second predefined parameter value, and obtain one the 5th audio signal; One second multitask selector, receives described 5th audio signal from described second priority treatment module; And multiple second subprime processing module, select for described second multitask selector to input described 5th audio signal, multiple second subprime processing module described in each is after described 5th audio signal of reception, adjust the direct current level of described 5th audio signal to described second predefined parameter value, and obtain one the 6th audio signal.
Further, wherein said first direct current level filtering circuit comprises one first electric capacity, and described second direct current level filtering circuit comprises one second electric capacity.
Further, wherein said first resistance is equal with the resistance value of described 3rd resistance, and described second resistance is equal with the resistance value of described 4th resistance.
Further, wherein when described first multitask selector is a positive voltage multitask switching chip, the resistance value of described first resistance is less than the resistance value of described second resistance, and the resistance value of described 3rd resistance is less than the resistance value of described 4th resistance.
Further, wherein this high potential is for providing via a voltage regulator, and this electronegative potential is an earthing potential.
Compared with prior art, the invention has the beneficial effects as follows:
Audio signal servicing unit of the present invention respectively adds one group of direct current level filtering circuit and direct current level regulator circuit at the two ends of multitask selector, its direct current level is adjusted after audio signal auxiliary input device, and in audio signal by after multitask selector, adjust its direct current level again, the audio signal direct current level at multitask selector two ends is made to remain fixing, to avoid producing sonic boom when selecting audio signal because of level difference, or produce the problem of interference tones because of the load of other high power consumptions.Moreover the present invention can use a multitask to switch chip to select audio signal, so to extend the useful life of servicing unit, prevent spring spark or produce surging and damage device.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of one of the present invention preferred embodiment when reality uses.
Fig. 2 is the partial schematic diagram of the audio signal servicing unit of Fig. 1.
Fig. 3 is the schematic diagram that the present invention has the audio signal servicing unit of computer switch.
Fig. 4 is the schematic diagram of another preferred embodiment when reality uses of the present invention.
Fig. 5 is the partial schematic diagram of Fig. 4 audio signal servicing unit.
Embodiment
Below in conjunction with embodiment, the present invention is further illustrated.Wherein, accompanying drawing only for exemplary illustration, expression be only schematic diagram, but not pictorial diagram, can not be interpreted as the restriction to this patent; In order to better embodiments of the invention are described, some parts of accompanying drawing have omission, zoom in or out, and do not represent the size of actual product; For a person skilled in the art, in accompanying drawing, some known features and explanation thereof may be omitted is understandable.
The corresponding same or analogous parts of same or analogous label in the accompanying drawing of the embodiment of the present invention, in describing the invention, it will be appreciated that, if have term " on ", D score, " left side ", orientation or the position relationship of the instruction such as " right side " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore the term of position relationship is described only for exemplary illustration in accompanying drawing, the restriction to this patent can not be interpreted as, for the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
As shown in Figure 1, audio signal processor 106a, 106b, 106c and 106d carrys out shared at least one audio signal output device 102 via audio signal servicing unit 104 of the present invention.Audio signal processor 106a, 106b, 106c or 106d are such as sound card, musical instruments digital interface unit, sound equipment, source of sound device or television set.Audio signal output device 102 is such as loudspeaker, earphone, monitor or expander, even be the input of other audio signal processors.
Audio signal servicing unit 104 chooses multiple audio signal processor one of 106a, 106b, 106c and 106d with a multitask selector, allows the audio signal processor be selected by audio signal output device 102 output audio signal.The present invention first receives the audio signal (step 202) that multiple audio signal processor 106a, 106b, 106c and 106d transmit.The direct current level (step 204) of the multiple audio signal of filtering, and the direct current level (step 206) adjusting multiple audio signals of filtering direct current level.In audio signal by (step 208) after multitask selector, again adjust the direct current level (step 216) of the audio signal be selected, and filtering this adjust the direct current level of the audio signal of direct current level again.
As above, audio signal servicing unit of the present invention connects multiple audio signal processor and at least one audio signal output device.In order to clearly explain orally the content of the present invention, the two ends of the audio signal servicing unit 104 shown in Fig. 3 only respectively illustrate audio signal processor 106 and an audio signal output device 102.
Audio signal servicing unit 104 of the present invention comprises multiple first processing unit, connects multiple audio signal processor accordingly separately, and single group of first processing unit 306 and audio signal processor 106 are only shown in Fig. 3.Audio signal servicing unit 104 also comprises at least one after-treatment device 302, in order to connect audio signal output device 102, and control the path switch between first processing unit 306 and after-treatment device 302 by multitask selector 304, so allow a certain audio signal processor 106 by audio signal output device 102 output audio signal.
Audio signal is after audio signal processor 106 input audio signal servicing unit 104, and the first direct current level filtering circuit 342 utilizes electric capacity 348 to carry out the direct current level of this audio signal of filtering.Then, the first direct current level regulator circuit 332 adjusts the direct current level of this audio signal.In this embodiment, the first direct current level regulator circuit 332 comprises one first resistance 336 and one second resistance 334, utilizes the direct current level of the principle adjustment audio signal of electric resistance partial pressure.One end and a high potential 356 of this first resistance 336 are electrically connected, and one end of the other end of this first resistance 336 and the second resistance 334 is electrically connected, and the other end of the second resistance 334 is connected with an electronegative potential 354.
Adjusted the audio signal of direct current level, and behind the path arranged by multitask selector 304, after-treatment device 302 can be admitted to, in after-treatment device 302, again adjusted its direct current level by the second direct current level regulator circuit 312.Similarly, in this embodiment, the second direct current level regulator circuit 312 comprises one the 3rd resistance 316 and one the 4th resistance 314, utilizes the direct current level of the principle adjustment audio signal of electric resistance partial pressure.One end and the high potential 356 of this 3rd resistance 316 are electrically connected, and one end of the other end of the 3rd resistance 316 and the 4th resistance 314 is electrically connected, and the other end of the 4th resistance 314 is connected with electronegative potential 354.Finally, through again adjusting the audio signal of direct current level, can, again by the second direct current level filtering circuit 322, electric capacity 328 be utilized to carry out the direct current level of this audio signal of filtering.
The audio signal servicing unit of prior art, be exactly because multitask selector is when switching the path between different first processing unit and after-treatment device, the direct current level of the audio signal at two ends is different, and causes the generation of sonic boom.The present invention utilizes the combination 342/332 and 322/312 of two direct current level filtering circuits and direct current level regulator circuit, the direct current level of the audio signal at fixing multitask selector 304 two ends, to avoid producing sonic boom because level difference when switched audio signal.
Because the first resistance 336 and the 3rd resistance 316 are all electrically connected to same high potential 356 (3.3 volts), and the second resistance 334 and the 4th resistance 314 are all electrically connected to same electronegative potential 354 (ground connection), therefore, first resistance 336 is equal with the resistance value of the 3rd resistance 316, and the second resistance 334 is equal with the resistance value of the 4th resistance 314.So, the direct current level of the audio signal at multitask selector 304 two ends could remain fixing.
In order to extend the useful life of servicing unit, and prevent spring spark or produce surging and damage device, multitask selector 304 selects a multitask to switch chip.Multitask switches chip and can be the positive voltage multitask switching chip driven with positive voltage, or coordinates the positive voltage multitask driven to switch chip with generating positive and negative voltage.Positive voltage multitask switches the small volume of chip, coordinates the adjustment function of the audio signal direct current level of the present invention, is applicable to the simple type audio signal servicing unit of small size.The tonequality that generating positive and negative voltage multitask switches chip is better, and can avoid the problem of cross-talk, is applicable to higher-priced high-quality audio signal servicing unit.
When multitask selector 304 is a positive voltage multitask switching chip, the resistance value of the first resistance 336 is less than the resistance value of the second resistance 334, and the resistance value 316 of the 3rd resistance is less than the resistance value of the 4th resistance 314.According to one of the present invention preferred embodiment, now the resistance value of the first resistance 336 and the 3rd resistance 316 is 5.6 kilohms (k Ω), and second the resistance value of resistance 334 and the 4th resistance 314 be 10 kilohms, so the adjustment of the direct current level of the audio signal at multitask selector about 304 two ends can be fixed to about 2 volts.
When the first multitask selector is a generating positive and negative voltage multitask switching chip, the resistance value of the first resistance 336 equals the resistance value of the second resistance 334, and the resistance value of the 3rd resistance 316 equals the resistance value of the 4th resistance 314.According to another preferred embodiment of the present invention, now the resistance value of the first resistance 336, second resistance 334, the 3rd resistance 316 and the 4th resistance 314 is all 10 kilohms, so the adjustment of the direct current level of the audio signal at multitask selector about 304 two ends can be fixed to about 0 volts.
Audio signal servicing unit of the present invention is incorporated in a computer switch, this computer switch can allow user use one or more groups input export relevant apparatus and manage the device controlling multiple stage computer.
Fig. 4 illustrates computer switch 404, and the switching that computer switch 404 is responsible between multiple stage computer 406 and at least one client 402 uses.In order to prevent the load because of other high power consumer apparatus, such as optical mouse, make the height potential fluctuation in computer switch and produce the problem of interference tones, device system of the present invention provides a stable high potential via a voltage regulator, and its electronegative potential system is connected to an earthing potential.
Fig. 4 is the schematic diagram of another preferred embodiment when reality uses.User is except using an audio signal output device 102 to come except the audio signal that optionally received audio signal processing unit 106a, 106b, 106c or 106d send by audio signal servicing unit 504, more can simultaneously by same audio signal servicing unit 504, use an Audio signal input device 502, the first processing unit of such as microphone or Audio signal input device, by another audio signal input audio signal processing unit 106a, 106b, 106c, 106d or other audio signal processor 106.
Fig. 5 is the partial schematic diagram of Fig. 4 audio signal servicing unit, only explains that it has the part about user's input audio signal below, and other part is then identical with the audio signal servicing unit shown in the 3rd figure.As above, audio signal servicing unit system of the present invention is in order to connect multiple audio signal processor and at least one Audio signal input device.In order to clearly explain orally content of the present invention, the two ends of the audio signal servicing unit 504 shown in Fig. 5 only respectively illustrate audio signal processor 106 and an Audio signal input device 502.
Audio signal servicing unit 504 of the present invention comprises multiple after-treatment device, connects multiple audio signal processor accordingly separately, and single group of after-treatment device 602 and audio signal processor 106 are only shown in Fig. 5.Audio signal servicing unit 504 also comprises at least one first processing unit 606, in order to connect Audio signal input device 502, and control the path switch between first processing unit 606 and after-treatment device 602 by multitask selector 604, so allow Audio signal input device 502 input audio signal to a certain audio signal processor 106.
Audio signal such as, from Audio signal input device 502, microphone, and after input audio signal servicing unit 504, the audio signal taken in due to general microphone is all very faint, therefore first coordinates resistance 662 to be amplified with high potential 656.Then, the first direct current level filtering circuit 642 utilizes electric capacity 648 to carry out the direct current level of this audio signal of filtering.
Then, the first direct current level regulator circuit 632 adjusts the direct current level of this audio signal.In this embodiment, the first direct current level regulator circuit 632 comprises one first resistance 636 and one second resistance 634, utilizes the direct current level of the principle adjustment audio signal of electric resistance partial pressure.One end and a high potential 656 of this first resistance 636 are electrically connected, and one end of the other end of this first resistance 636 and the second resistance 634 is electrically connected, and the other end of the second resistance 634 is connected with an electronegative potential 654.
Adjusted the audio signal of direct current level, the after-treatment device 602 corresponding to a certain audio signal processor 106 can be admitted to behind the path arranged by multitask selector 604, in after-treatment device 602, again be adjusted its direct current level by the second direct current level regulator circuit 612.Similarly, in this embodiment, the second direct current level regulator circuit 612 comprises one the 3rd resistance 616 and one the 4th resistance 614, utilizes the direct current level of the principle adjustment audio signal of electric resistance partial pressure.One end and the high potential 656 of this 3rd resistance 616 are electrically connected, and one end of the other end of the 3rd resistance 616 and the 4th resistance 614 is electrically connected, and the other end of the 4th resistance 614 is connected with electronegative potential 654.Finally, through again adjusting the audio signal of direct current level, can, again by the second direct current level filtering circuit 622, electric capacity 628 be utilized to carry out the direct current level of this audio signal of filtering.
Similarly, when multitask selector 604 is a positive voltage multitask switching chip, the resistance value of the first resistance 636 is less than the resistance value of the second resistance 634, and the resistance value 616 of the 3rd resistance is less than the resistance value of the 4th resistance 614.According to a preferred embodiment of the present invention, now the resistance value of the first resistance 636 and the 3rd resistance 616 is 15 kilohms (k Ω), and the resistance value of the second resistance 634 and the 4th resistance 614 is 27 kilohms.
When the first multitask selector is a generating positive and negative voltage multitask switching chip, the resistance value of the first resistance 636 equals the resistance value of the second resistance 634, and the resistance value of the 3rd resistance 616 equals the resistance value of the 4th resistance 614.According to another preferred embodiment of the present invention, now the resistance value of the first resistance 636, second resistance 634, the 3rd resistance 616 and the 4th resistance 614 is all 10 kilohms.
Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all execution modes.All do in the spirit and principles in the present invention any amendment, equivalent to replace and improvement etc., all should be included in the protection range of the claims in the present invention.
Claims (1)
1. an audio signal servicing unit, it is for sharing at least one audio signal output device for multiple first audio signal processor, it is characterized in that, described audio signal servicing unit at least comprises: for connecting multiple first priority treatment modules of described multiple first audio signal processor, wherein multiple first priority treatment module described in each receives one first audio signal from the first audio signal processor connected, and adjust direct current level to the one first predefined parameter value of described first audio signal, and obtain one second audio signal, one first multitask selector, from described multiple first priority treatment module receive described second audio signal, and select described second audio signal one of them for output, and one first secondary processing module, receive by described second audio signal selected, and adjust by the direct current level extremely described first predefined parameter value of described second audio signal selected, and obtain one the 3rd audio signal, wherein described in each, multiple first priority treatment module comprises one first direct current level filtering circuit, in order to the direct current level of the first audio signal described in filtering, and one first direct current level regulator circuit, described first audio signal of filtering direct current level is received from described first direct current level filtering circuit, and adjust the direct current level of described first audio signal of filtering direct current level to described first predefined parameter value, and described first secondary processing module comprises one second direct current level regulator circuit, receive by described second audio signal selected from described first multitask selector, and adjust by the direct current level extremely described first predefined parameter value of described second audio signal selected, and one second direct current level filtering circuit, described second audio signal of adjusted direct current level is received from described second direct current level regulator circuit, and the direct current level of described first audio signal of filtering adjusted direct current level,
Wherein said first direct current level regulator circuit comprises one first resistance and one second resistance, one end and a high potential of described first resistance are electrically connected, the other end of described first resistance and one end of described second resistance are electrically connected, and the other end of described second resistance is connected with an electronegative potential, and described second direct current level regulator circuit comprises one the 3rd resistance and one the 4th resistance, one end and the described high potential of described 3rd resistance are electrically connected, the other end of described 3rd resistance and one end of described 4th resistance are electrically connected, and the other end of described 4th resistance and described electronegative potential are electrically connected,
Wherein said audio signal servicing unit also shares at least one Audio signal input device for multiple second audio signal processor, described audio signal servicing unit also comprises: one second priority treatment module, connect described Audio signal input device, wherein said second priority treatment module receives one the 4th audio signal from described Audio signal input device, and adjust described 4th audio signal and obtain direct current level to one second predefined parameter value, and obtain one the 5th audio signal; One second multitask selector, receives described 5th audio signal from described second priority treatment module; And multiple second subprime processing module, select for described second multitask selector to input described 5th audio signal, multiple second subprime processing module described in each is after described 5th audio signal of reception, adjust the direct current level of described 5th audio signal to described second predefined parameter value, and obtain one the 6th audio signal;
Wherein said first direct current level filtering circuit comprises one first electric capacity, and described second direct current level filtering circuit comprises one second electric capacity;
The other end of wherein said first resistance is also electrically connected with described first direct current level filtering circuit and described first multitask selector, and the other end of described 3rd resistance is also electrically connected with described second direct current level filtering circuit and described first multitask selector;
Wherein said first resistance is equal with the resistance value of described 3rd resistance, and described second resistance is equal with the resistance value of described 4th resistance;
Wherein when described first multitask selector is a positive voltage multitask switching chip, the resistance value of described first resistance is less than the resistance value of described second resistance, and the resistance value of described 3rd resistance is less than the resistance value of described 4th resistance;
Wherein this high potential is for providing via a voltage regulator, and this electronegative potential is an earthing potential.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510224831.1A CN104796821A (en) | 2015-05-06 | 2015-05-06 | Audio signal assisting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510224831.1A CN104796821A (en) | 2015-05-06 | 2015-05-06 | Audio signal assisting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104796821A true CN104796821A (en) | 2015-07-22 |
Family
ID=53561266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510224831.1A Pending CN104796821A (en) | 2015-05-06 | 2015-05-06 | Audio signal assisting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104796821A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201039356Y (en) * | 2007-05-21 | 2008-03-19 | 青岛海信电器股份有限公司 | Audio and video selection and switching circuit |
| CN101494818A (en) * | 2008-12-26 | 2009-07-29 | 广州励丰声光科技有限公司 | Multichannel audio standby system |
| CN101521488A (en) * | 2008-02-28 | 2009-09-02 | 凌阳多媒体股份有限公司 | Voice drive circuit for reducing sonic boom when switching on and shutting down |
| CN101621280A (en) * | 2008-07-04 | 2010-01-06 | 伦飞电脑实业股份有限公司 | Audio output device for preventing crackle |
| CN101790122A (en) * | 2010-02-06 | 2010-07-28 | 青岛海信移动通信技术股份有限公司 | Plosive eliminating circuit of audio system and mobile communication terminal |
| JP2015015509A (en) * | 2013-07-03 | 2015-01-22 | オンキヨー株式会社 | Voice signal amplifier |
| CN104467704A (en) * | 2013-11-25 | 2015-03-25 | 松翰科技股份有限公司 | Audio amplifier, electronic device using same and transient noise suppression method |
| CN204616066U (en) * | 2015-05-06 | 2015-09-02 | 岭南师范学院 | A kind of audio signal servicing unit |
-
2015
- 2015-05-06 CN CN201510224831.1A patent/CN104796821A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201039356Y (en) * | 2007-05-21 | 2008-03-19 | 青岛海信电器股份有限公司 | Audio and video selection and switching circuit |
| CN101521488A (en) * | 2008-02-28 | 2009-09-02 | 凌阳多媒体股份有限公司 | Voice drive circuit for reducing sonic boom when switching on and shutting down |
| CN101621280A (en) * | 2008-07-04 | 2010-01-06 | 伦飞电脑实业股份有限公司 | Audio output device for preventing crackle |
| CN101494818A (en) * | 2008-12-26 | 2009-07-29 | 广州励丰声光科技有限公司 | Multichannel audio standby system |
| CN101790122A (en) * | 2010-02-06 | 2010-07-28 | 青岛海信移动通信技术股份有限公司 | Plosive eliminating circuit of audio system and mobile communication terminal |
| JP2015015509A (en) * | 2013-07-03 | 2015-01-22 | オンキヨー株式会社 | Voice signal amplifier |
| CN104467704A (en) * | 2013-11-25 | 2015-03-25 | 松翰科技股份有限公司 | Audio amplifier, electronic device using same and transient noise suppression method |
| CN204616066U (en) * | 2015-05-06 | 2015-09-02 | 岭南师范学院 | A kind of audio signal servicing unit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7709975B2 (en) | Redundant power supply system | |
| US12009665B2 (en) | Photovoltaic system, optimizer, and method for adjusting working state of optimizer | |
| US8806086B2 (en) | Serial port connection circuit and server | |
| US20050238186A1 (en) | Method for switching audio signals and the device of the same | |
| CN106164886A (en) | Peripheral unit, host apparatus and processing method | |
| CN204616066U (en) | A kind of audio signal servicing unit | |
| US20130238911A1 (en) | Power supply device for computer systems and computer system using the power supply device | |
| JP5324523B2 (en) | Apparatus and method for processing digital input signals from multiple circuit breakers | |
| CN111984759A (en) | Question and answer processing method and device, electronic equipment and storage medium | |
| CN109861038B (en) | USB connection port capable of automatically switching connection mode and control method thereof | |
| US20140317423A1 (en) | Multi-battery power supply system | |
| CN207233362U (en) | A kind of LED display power supply module, LED display control system and LED display | |
| JP2018529301A (en) | Power adapter, terminal device, charging system, and charging method | |
| US20030156370A1 (en) | Power distribution panel capable of transmitting data and wired telecommunication network system including the same | |
| CN104796821A (en) | Audio signal assisting device | |
| CN209417182U (en) | A kind of test fixture and pinboard | |
| CN105074668A (en) | Test design assistance device, test design assistance method, program, and computer read medium | |
| US20220140611A1 (en) | Microgrid control design system | |
| CN113778363A (en) | Display terminal, cascade system thereof and control method | |
| CN107370653B (en) | Electric power communication interface conversion device with automatic switching function | |
| JP2011239136A (en) | Imaging apparatus | |
| US20140006811A1 (en) | Power supply circuit for hard disk backplane and server system using same | |
| CN113485088B (en) | Keyboard switching circuit and control method thereof | |
| US20110096520A1 (en) | Motherboard and relay device thereon | |
| US8018728B2 (en) | Patch panel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150722 |