CN109068238A - microphone and intelligent sound box - Google Patents
microphone and intelligent sound box Download PDFInfo
- Publication number
- CN109068238A CN109068238A CN201811174234.2A CN201811174234A CN109068238A CN 109068238 A CN109068238 A CN 109068238A CN 201811174234 A CN201811174234 A CN 201811174234A CN 109068238 A CN109068238 A CN 109068238A
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- China
- Prior art keywords
- receiving unit
- audio receiving
- pair
- audio
- control unit
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
- H04R29/004—Monitoring arrangements; Testing arrangements for microphones
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The invention discloses microphone and intelligent sound box, belongs to and relate to Audiotechnica field.Microphone, comprising: at least a pair of of audio receiving unit, for audio analog signals to be converted to digital signal；One control unit, connection at least a pair of of audio receiving unit, the digital signal sent for receiving at least a pair of of audio receiving unit；Further include: a pull down resistor is connected between described control unit and at least a pair of of audio receiving unit, for identification the working condition of at least a pair of of audio receiving unit.The present invention identifies the working condition of audio receiving unit by pull down resistor, it may be determined that because of rosin joint or the audio receiving unit of damage, convenient for the positioning and maintenance of failure.
Description
Technical field
The present invention relates to Audiotechnica field more particularly to a kind of microphones and intelligent sound box.
Background technique
Microphone mainly uses PCM (pulse density modulation, pulse code modulation) interface chip at present
Or PDM (pulse code modulation, pulse density modulated) interface chip.One system of the corresponding system of pcm interface chip
The word of more bits is arranged to characterize one by sampled signal, is conducive to simplify processing, the operation of signal processing can be on audio stream
It completes, such as mixes, filtering and equilibrium.PDM interface chip only transmits audio with 1bit, simpler than PCM on practicable degree
It is single.Which are mainly applied to audio is transferred to signal processor from microphone in mobile terminal.PDM interface chip has low noise
The advantages of, it can be from interference signal, and cost is relatively low.
Fig. 1 is the circuit diagram of existing microphone, and wherein the microphone includes two PDM interface chips (MIC0, MIC1),
Since the DATA pin of microphone has parasitic capacitance, if the interface rosin joint of PDM interface chip or damage, another good
PDM interface chip will be kept in high configuration (High Z) state and signal as before, leads to two PDM interface chips
(for MIC0 as the data of MIC1), existing software is difficult the problem of identifying this PDM interface chip failure welding.
Summary of the invention
Aiming at the problem that existing microphone PDM interface chip failure welding, one kind is now provided and aims at recognizable PDM
The microphone and intelligent sound box of failure of chip.
A kind of microphone, comprising:
At least a pair of of audio receiving unit, for audio analog signals to be converted to digital signal；
One control unit, connection at least a pair of of audio receiving unit are received for receiving at least a pair of of audio
The digital signal that unit is sent；
Further include:
One pull down resistor is connected between described control unit and at least a pair of of audio receiving unit, for identification
The working condition of at least a pair of of audio receiving unit.
Preferably, described control unit includes the first output end and first input end, described in first output end connection
Second input terminal of at least a pair of of audio receiving unit, first input end connection at least a pair of of audio receiving unit
Second output terminal, described control unit are believed by first output end at least a pair of of audio receiving unit tranmitting data register
Number, at least a pair of of audio receiving unit sends the digital signal to described control unit by the second output terminal；
The pull down resistor is connected to the first input end and at least a pair of of audio receiving unit of described control unit
Second output terminal between.
Preferably, at least a pair of of audio receiving unit includes:
One first audio receiving unit, including third input terminal and third output end；
One second audio receiving unit, including the 4th input terminal and the 4th output end, the third input terminal and described
The second input terminal of at least a pair of of audio receiving unit, the third output end and the described 4th is collectively formed in four input terminals
The second output terminal of at least a pair of of audio receiving unit is collectively formed in output end；
The first audio receiving unit is used to send number to described control unit when receiving rising edge clock signal
Word signal；
The first audio receiving unit is used to send number to described control unit when receiving clock signal failing edge
Word signal.
Preferably, the pull down resistor is used to identify that first audio is received when the clock signal is high level single
The working condition of member is also used to identify the work shape of the first audio receiving unit when the clock signal is low level
State.
Preferably, the working condition includes that the audio receiving unit is in normal operating conditions and audio reception
Unit is in malfunction when rosin joint.
Preferably, the audio receiving unit uses pulse density modulated chip.
The present invention also provides a kind of intelligent sound boxes, including above-mentioned microphone.
Above-mentioned technical proposal the utility model has the advantages that
In the technical program, the present invention identifies the working condition of audio receiving unit by pull down resistor, it may be determined that because of void
The audio receiving unit of weldering or damage, convenient for the positioning and maintenance of failure.
Detailed description of the invention
Fig. 1 is the circuit diagram of existing microphone；
Fig. 2 is timing diagram of the MIC0 and MIC1 when being normal condition；
Fig. 3 is that interface rosin joint, the MIC1 of MIC0 are in the timing diagram of normal condition；
Fig. 4 is a kind of schematic diagram of embodiment of microphone of the present invention；
Fig. 5 is that interface rosin joint, the MIC3 of MIC2 are in the timing diagram of normal condition.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art without creative labor it is obtained it is all its
His embodiment, shall fall within the protection scope of the present invention.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
As described in Figure 1, uniformly there are two signals for each PDM interface chip, are respectively as follows: clock signal for receiving clock letter
Number, data-signal converts analog signals into digital signal and exports；The pin 2 of MIC0 connects high level, sends in control unit
Clock signal CLOCK when being rising edge, MIC0 sends digital signal to control unit；The pin 2 of MIC1 connects low level, is controlling
When the clock signal CLOCK that unit processed is sent is failing edge, MIC1 sends digital signal to control unit.Fig. 2 be MIC0 and
Timing diagram when MIC1 is normal condition.
When MIC0 rosin joint, MIC0 can not output digit signals, since the data of PDM interface chip have the ability of holding,
Therefore, the MIC0 data on DATA are read as MIC1, i.e., the data of DATA are wrong and can mislead, all
Become the data of MIC1, the receiving end of such control unit receive the digital signal that DATA is two MIC1 be exactly it is identical,
MIC0, which can not be recognized, rosin joint, as shown in figure 3, when interface rosin joint, the MIC1 of MIC0 are in the timing diagram of normal condition.
It is difficult the problem of identifying PDM interface chip failure welding based on above-mentioned, the present invention provides one kind to pass through drop-down electricity
The microphone and intelligent sound box of resistance identification PDM interface chip failure.
The present invention will be further explained below with reference to the attached drawings and specific examples, but not as the limitation of the invention.
As shown in figure 4, the present invention provides a kind of microphones, comprising:
At least a pair of of audio receiving unit, for audio analog signals to be converted to digital signal；
One control unit A, connection at least a pair of of audio receiving unit are received for receiving at least a pair of of audio
The digital signal that unit is sent；
Further include:
One pull down resistor B is connected between described control unit A and at least a pair of of audio receiving unit, for knowing
The working condition of not described at least a pair of of audio receiving unit.
Further, the audio receiving unit uses pulse density modulated chip (that is: PDM interface chip).
In the present embodiment, the working condition of audio receiving unit is identified by pull down resistor B, it may be determined that because of rosin joint or damage
Bad audio receiving unit, convenient for the positioning and maintenance of failure.
In a preferred embodiment, described control unit A includes the first output end and first input end, first output
Second input terminal of end connection at least a pair of of audio receiving unit, first input end connection at least a pair of of audio
The second output terminal of receiving unit, described control unit A are received by first output end at least a pair of of audio single
First tranmitting data register signal CLOCK, at least a pair of of audio receiving unit is by the second output terminal to described control unit A
Send the digital signal；
The pull down resistor B is connected to the first input end of described control unit A and at least a pair of of audio receives list
Between the second output terminal of member.
In a preferred embodiment, at least a pair of of audio receiving unit includes:
One first audio receiving unit MIC2, including third input terminal and third output end；
One second audio receiving unit MIC3, including the 4th input terminal and the 4th output end, the third input terminal and institute
State the second input terminal that at least a pair of of audio receiving unit is collectively formed in the 4th input terminal, the third output end and described
The second output terminal of at least a pair of of audio receiving unit is collectively formed in 4th output end；
The first audio receiving unit MIC2 is used to rise in the clock signal CLOCK for receiving control unit A transmission
Along when to described control unit A send digital signal；
The first audio receiving unit MIC2 is used in the clock signal CLOCK decline for receiving control unit A transmission
Along when to described control unit A send digital signal.
In a preferred embodiment, the pull down resistor B is used to identify described the when the clock signal is high level
The working condition of one audio receiving unit MIC2 is also used to identify that first audio connects when the clock signal is low level
Receive the working condition of unit MIC2.
As an example, using microphone of the invention when the first audio receiving unit MIC2 has rosin joint, the second audio
When receiving unit MIC3 is normal, the data that the first audio receiving unit MIC2 is sent all are 0 (low levels), and control unit A does not have
Digital signal is received, is all normal, suppression by the digital signal that pull down resistor can be such that the second audio receiving unit MIC3 sends
The digital signal of its transmission is made because of the problem of high configuration is kept and signal as before, the number for receiving control unit A
Signal DATA be actually consistent, as shown in Figure 5.Realize the purpose of positioning failure audio receiving unit.
For example and without limitation, 2Kohm resistance can be used in pull down resistor B.
In a preferred embodiment, the working condition includes that the audio receiving unit is in normal operating conditions and institute
State malfunction when audio receiving unit is in rosin joint.
The present invention also provides a kind of intelligent sound boxes, including such as above-mentioned microphone.
The foregoing is merely preferred embodiments of the present invention, are not intended to limit embodiments of the present invention and protection model
It encloses, to those skilled in the art, should can appreciate that all with made by description of the invention and diagramatic content
Equivalent replacement and obviously change obtained scheme, should all be included within the scope of the present invention.
Claims (7)
1. a kind of microphone, comprising:
At least a pair of of audio receiving unit, for audio analog signals to be converted to digital signal；
One control unit, connection at least a pair of of audio receiving unit, for receiving at least a pair of of audio receiving unit
The digital signal sent；
It is characterized by further comprising:
One pull down resistor is connected between described control unit and at least a pair of of audio receiving unit, described for identification
The working condition of at least a pair of of audio receiving unit.
2. microphone according to claim 1, which is characterized in that described control unit includes that the first output end and first are defeated
Enter end, the second input terminal of the first output end connection at least a pair of of audio receiving unit, the first input end connects
Connect the second output terminal of at least a pair of of audio receiving unit, described control unit by first output end to it is described extremely
Few a pair of audio receiving unit tranmitting data register signal, at least a pair of of audio receiving unit is by the second output terminal to institute
It states control unit and sends the digital signal；
The pull down resistor be connected to described control unit first input end and at least a pair of of audio receiving unit the
Between two output ends.
3. microphone according to claim 2, which is characterized in that at least a pair of of audio receiving unit includes:
One first audio receiving unit, including third input terminal and third output end；
One second audio receiving unit, including the 4th input terminal and the 4th output end, the third input terminal and described 4th defeated
Enter the second input terminal that at least a pair of of audio receiving unit is collectively formed in end, the third output end and the 4th output
The second output terminal of at least a pair of of audio receiving unit is collectively formed in end；
The first audio receiving unit is used to send number letter to described control unit when receiving rising edge clock signal
Number；
The first audio receiving unit is used to send number letter to described control unit when receiving clock signal failing edge
Number.
4. microphone according to claim 3, which is characterized in that the pull down resistor is used in the clock signal be height
The working condition that the first audio receiving unit is identified when level is also used in the clock signal to identify institute when low level
State the working condition of the first audio receiving unit.
5. microphone according to claim 1, which is characterized in that the working condition includes at the audio receiving unit
Malfunction when normal operating conditions and the audio receiving unit are in rosin joint.
6. microphone according to claim 1, which is characterized in that the audio receiving unit uses pulse density modulated core
Piece.
7. a kind of intelligent sound box, which is characterized in that including the microphone as described in claim 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811174234.2A CN109068238A (en) | 2018-10-09 | 2018-10-09 | microphone and intelligent sound box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811174234.2A CN109068238A (en) | 2018-10-09 | 2018-10-09 | microphone and intelligent sound box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109068238A true CN109068238A (en) | 2018-12-21 |
Family
ID=64764520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811174234.2A Pending CN109068238A (en) | 2018-10-09 | 2018-10-09 | microphone and intelligent sound box |
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| Country | Link |
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| CN (1) | CN109068238A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112822621A (en) * | 2019-11-18 | 2021-05-18 | 瑞昱半导体股份有限公司 | Test circuit and test method of dual-channel microphone and audio codec |
| CN113329316A (en) * | 2021-05-28 | 2021-08-31 | 四川长虹电器股份有限公司 | Array microphone missing detection circuit and method |
| US11368805B2 (en) | 2019-11-11 | 2022-06-21 | Realtek Semiconductor Corporation | Test circuit, test method and audio codec for stereo microphones |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104320738A (en) * | 2014-09-29 | 2015-01-28 | 宇龙计算机通信科技(深圳)有限公司 | Digital microphone circuit |
| CN105635907A (en) * | 2015-12-18 | 2016-06-01 | 歌尔声学股份有限公司 | Digital microphone |
| CN207939738U (en) * | 2018-03-20 | 2018-10-02 | 厦门歌乐电子企业有限公司 | A kind of microphone state detection circuit and vehicle multi-media player |
-
2018
- 2018-10-09 CN CN201811174234.2A patent/CN109068238A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104320738A (en) * | 2014-09-29 | 2015-01-28 | 宇龙计算机通信科技(深圳)有限公司 | Digital microphone circuit |
| CN105635907A (en) * | 2015-12-18 | 2016-06-01 | 歌尔声学股份有限公司 | Digital microphone |
| CN207939738U (en) * | 2018-03-20 | 2018-10-02 | 厦门歌乐电子企业有限公司 | A kind of microphone state detection circuit and vehicle multi-media player |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11368805B2 (en) | 2019-11-11 | 2022-06-21 | Realtek Semiconductor Corporation | Test circuit, test method and audio codec for stereo microphones |
| CN112822621A (en) * | 2019-11-18 | 2021-05-18 | 瑞昱半导体股份有限公司 | Test circuit and test method of dual-channel microphone and audio codec |
| CN112822621B (en) * | 2019-11-18 | 2023-02-28 | 瑞昱半导体股份有限公司 | Test circuit and test method of dual-channel microphone and audio codec |
| CN113329316A (en) * | 2021-05-28 | 2021-08-31 | 四川长虹电器股份有限公司 | Array microphone missing detection circuit and method |
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| PB01 | Publication | ||
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Application publication date: 20181221 |