CN206533545U - A kind of detection circuit of audio input signal - Google Patents
A kind of detection circuit of audio input signal Download PDFInfo
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- CN206533545U CN206533545U CN201620993096.0U CN201620993096U CN206533545U CN 206533545 U CN206533545 U CN 206533545U CN 201620993096 U CN201620993096 U CN 201620993096U CN 206533545 U CN206533545 U CN 206533545U
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Abstract
The utility model discloses a kind of detection circuit of audio input signal.The circuit includes：First high pass filter unit, two inputs connect left channel audio signal and right channel audio signal respectively；First order amplifier unit, negative input end connects the output end of first high pass filter unit；Positive input terminal connects the first bias voltage；Output end connects the input of the second high pass filter unit；Second level amplifier unit, negative input end connects the output end of second high pass filter unit；Positive input terminal inputs the second bias voltage；3rd high pass filter unit, input connects the output end of the second level amplifier unit；Current collection level penetrates level and follows circuit altogether, and input connects the output end of the 3rd high pass filter unit；Cascode level amplifying circuit, current collection level penetrates the output end that level follows circuit altogether for input connection, and output end is exported to left channel audio signal and the audio detection signal of right channel audio signal.The utility model can export the detection signal to outside audio input signal.
Description
Technical field
The utility model is related to audio signal technology, the detection circuit of more particularly to a kind of audio input signal.
Background technology
In existing wireless acoustics product, often can all there is wireline audio input, thus have several kinds of audios defeated
Enter source.The problem of so how going to switch these audio input sources just comes out.
Existing solution is:Go switching manually with button, it is not very convenient so to operate.If audio input source is more
If, it is necessary to take several buttons, it is not very succinct that product, which gives people to feel,.
Utility model content
A kind of detection circuit for audio input signal that the utility model is provided, can be exported to outside audio input signal
Detection signal, so as to realize the automatic detection to outside audio input signal.
To reach above-mentioned purpose, what the technical solution of the utility model was realized in：
A kind of detection circuit of audio input signal, including：
First high pass filter unit, two inputs of first high-pass filter connect left channel audio signal respectively
And right channel audio signal；
First order amplifier unit, the negative input end of the first order amplifier unit connects first high pass filter unit
Output end；The positive input terminal of the first order amplifier unit connects the first bias voltage；The output of the first order amplifier unit
The input of the second high pass filter unit of end connection；
Second level amplifier unit, the negative input end of the second level amplifier unit connects second high pass filter unit
Output end；The positive input terminal of the second level amplifier unit inputs the second bias voltage；
3rd high pass filter unit, the input of the 3rd high pass filter unit connects the second level amplifier unit
Output end；
Current collection level penetrates level and follows circuit altogether, and the level of current collection altogether penetrates level and follows the input of circuit to connect the 3rd high pass
The output end of filter unit；
Cascode level amplifying circuit, the input connection level of current collection altogether of the amplifying circuit of the cascode level penetrates level and follows electricity
The output end on road, the output end output of the amplifying circuit of the cascode level is believed the left channel audio signal and right audio channel
Number audio detection signal.
First high pass filter unit is specially：
The first end of first electric capacity is the first input end of first high pass filter unit；The first end of second electric capacity is
Second input of first high pass filter unit；
Second end of first electric capacity connects the first end of second resistance；The second end connection the 3rd of second electric capacity
The first end of resistance；
Second end of the second resistance and the second end connection of the 3rd resistor, are used as the first high-pass filtering list
The output end of member.
The first order amplifier unit is specially：
First operational amplifier, the negative input end of first operational amplifier is the negative defeated of the first order amplifier unit
Enter end；The positive input terminal of first operational amplifier is the positive input terminal of the first order amplifier unit；First computing
The output end of amplifier is the output end of the first order amplifier unit；
The negative input end of first operational amplifier connect respectively first resistor first end and the second electric capacity first
End；The output end of first operational amplifier connects the second end of first resistor and the second end of the second electric capacity respectively.
Export first bias voltage and export the circuit of second bias voltage and be specially：
The first end connection supply voltage of 9th resistance；
The positive pole and the first end downlink connection of the 12nd resistance of second end of the 9th resistance respectively with the 8th electric capacity；Institute
State the negative pole of the 8th electric capacity and the second end ground connection of the 12nd resistance；
Second end of the 9th resistance exports first bias voltage by the 5th resistance；
Second end of the 9th resistance exports second bias voltage by the 11st resistance.
Second high pass filter unit is specially：
The first end of 4th resistance as second high pass filter unit input；Second end of the 4th resistance
Connect the first end of the 6th electric capacity；
Second end of the 6th electric capacity is the output end of the second high pass filter unit.
The second level amplifier unit is specially：
Second operational amplifier, the negative input end of second operational amplifier is the negative defeated of the second level amplifier unit
Enter end；The positive input terminal of second operational amplifier is the positive input terminal of the second level amplifier unit；Second computing
The output end of amplifier is the output end of the second level amplifier unit；
The negative input end of second operational amplifier connect respectively the 7th resistance first end and the 7th electric capacity first
End；The output end of second operational amplifier connects the second end of the 7th resistance and the second end of the 7th electric capacity respectively.
3rd high pass filter unit is specially：
The first end of tenth resistance as the 3rd high pass filter unit input；Second end of the tenth resistance
Connect the first end of the 9th electric capacity；Second end of the 9th electric capacity is the output end of the 3rd high pass filter unit.
The level of current collection altogether penetrates level and follows the circuit to be specially：
First triode, the base stage of first triode penetrates the input that level follows circuit as the level of current collection altogether；
The colelctor electrode of first triode connects supply voltage by the 6th resistance；The emitter stage of first triode is connected respectively
First end, the first end of the tenth electric capacity, the first end of the 13rd resistance of 14th resistance；The second of 14th resistance
End, the second end of the tenth electric capacity are grounded respectively；Second end of the 13rd resistance passes through the 15th resistance eutral grounding；
The base stage of first triode is connected with the negative pole of first diode；The emitter stage of first triode
It is connected with the positive pole of first diode.
Cascode level amplifying circuit is specially：
Second triode, the base stage of second triode is the input of cascode level amplifying circuit；
The output end of the extremely described cascode level amplifying circuit of the current collection of second triode；
The colelctor electrode of second triode is connected by the 8th resistance with the supply voltage；
The grounded emitter of second triode.
The detection circuit also includes：
4th electric capacity and the 5th electric capacity,
The first end of 4th electric capacity and the positive pole connection supply voltage of the 5th electric capacity；
Second end of the 4th electric capacity and the negative pole ground connection of the 5th electric capacity.
The beneficial effect of the utility model embodiment is：
The utility model can export the detection signal to outside audio input signal, so as to realize to outside audio input
The automatic detection of signal so that subsequently can accordingly be handled according to detection signal.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of the detection circuit of audio input signal described in the utility model；
Fig. 2 is a kind of connection diagram of the detection circuit of audio input signal described in the utility model embodiment；
Fig. 3 is a kind of artificial circuit figure of the detection circuit of audio input signal described in the utility model embodiment；
Fig. 4 be the circuit described in the utility model embodiment input signal be 1V simulation result schematic diagram；
Fig. 5 be the circuit described in the utility model embodiment input signal be 1mV simulation result schematic diagram；
Fig. 6 is the application circuit schematic diagram of the circuit described in the utility model embodiment.
Embodiment
It is new to this practicality below in conjunction with accompanying drawing to make the purpose of this utility model, technical scheme and advantage clearer
Type embodiment is described in further detail.
As shown in figure 1, be a kind of detection circuit of audio input signal described in the utility model, including：
First high pass filter unit 11, two inputs of first high-pass filter connect left audio letter respectively
Number and right channel audio signal；
First order amplifier unit 12, the negative input end of the first order amplifier unit connects first high pass filter unit
Output end；The positive input terminal of the first order amplifier unit connects the first bias voltage；The first order amplifier unit it is defeated
Go out the input of the second high pass filter unit 13 of end connection；
Second level amplifier unit 14, the negative input end of the second level amplifier unit 14 connects the second high-pass filtering list
The output end of member；The positive input terminal of the second level amplifier unit inputs the second bias voltage；
3rd high pass filter unit 15, the input of the 3rd high pass filter unit connects the second level amplifier unit
Output end；
Current collection level penetrates level and follows circuit 16 altogether, and the level of current collection altogether penetrates level and follows the input connection the described 3rd of circuit high
The output end of pass filtering unit；
Cascode level amplifying circuit 17, the input connection level of current collection altogether of the amplifying circuit of the cascode level is penetrated level and followed
The output end of circuit, the output end of the amplifying circuit of the cascode level is exported to the left channel audio signal and right audio channel
The audio detection signal of signal.
In circuit of the present utility model, when the audio signal input for there are left and right acoustic channels, pass through the blocking electricity of amplifier front end
Hold, subsequently into amplifier, be enlarged into pulse signal.Amplified by two-stage, the pulse signal after amplification goes to control leading for triode
It is logical.After triode Q1, then by triode Q2, audio detection signal is exported.It is normal to be inputted without outside wireline audio signal
When, Audio_Detect pins are height output；When there is outside wireline audio signal to input, Audio_Detec is output as low electricity
It is flat.In subsequent treatment, single-chip microcomputer is become to bring by the height of audio detection signal and judges whether to need the audio input power amplifier
Source be switched to the input of outside wireline audio or it is other be wirelessly input to, so as to realize that source signal automatically switches.
As shown in Fig. 2 the first high pass filter unit 11 is specially：
First electric capacity C1 first end is the first input end of first high pass filter unit 11；The of second electric capacity C2
One end is the second input of first high pass filter unit；
The second end connection second resistance R2 of first electric capacity C2 first end；The second end of the second electric capacity C2 connects
Connect 3rd resistor R3 first end；
The second end of the second resistance R2 and the connection of the second end of the 3rd resistor R3, are filtered as first high pass
The output end of ripple unit 11.
The first order amplifier unit 12 is specially：
First operational amplifier U3A, the first operational amplifier U3A negative input end is the first order amplifier unit
12 negative input end；The positive input terminal of the first operational amplifier U3A is the positive input terminal of the first order amplifier unit；Institute
The output end for stating the first operational amplifier U3A is the output end of the first order amplifier unit；
The negative input end of the first operational amplifier U3A connects first resistor R1 first end and the second electric capacity C2 respectively
First end；The output end of the first operational amplifier U3A connects first resistor R1 the second end and the second electric capacity C2 respectively
The second end.
Export first bias voltage and export the circuit of second bias voltage and be specially：
9th resistance R9 first end connection supply voltage；
The second end of the 9th resistance R9 connects with the 8th electric capacity C8 positive pole and the 12nd resistance R12 first end respectively
Connection；The negative pole of the 8th electric capacity C8 and the second end ground connection of the 12nd resistance R12；
The second end of the 9th resistance R9 exports first bias voltage by the 5th resistance R5；
The second end of the 9th resistance R9 is high by described in the 11st resistance R11 outputs second bias voltage second
Pass filtering unit 13 is specially：
4th resistance R4 first end as second high pass filter unit 13 input；The 4th resistance R4's
Second end connects the 6th electric capacity C6 first end；
The second end of the 6th electric capacity C6 is the output end of the second high pass filter unit 13.
The second level amplifier unit 14 is specially：
Second operational amplifier U3B, the second operational amplifier U3B negative input end is the second level amplifier unit
14 negative input end；The positive input terminal of the second operational amplifier U3B is the positive input terminal of the second level amplifier unit 14；
The output end of the second operational amplifier U3B is the output end of the second level amplifier unit 14；
The negative input end of the second operational amplifier U3B connects the 7th resistance R7 first end and the 7th electric capacity C7 respectively
First end；The output end of the second operational amplifier U3B connects the 7th resistance R7 the second end and the 7th electric capacity C7 respectively
The second end.
3rd high pass filter unit 15 is specially：
Tenth resistance R10 first end as the 3rd high pass filter unit 15 input；The tenth resistance R10
The second end connect the 9th electric capacity C9 first end；The second end of the 9th electric capacity C9 is the 3rd high pass filter unit
Output end.
The level of current collection altogether penetrates level and follows the circuit 16 to be specially：
First triode Q1, the first triode Q1 base stage penetrates the input that level follows circuit as the level of current collection altogether
End；The colelctor electrode of the first triode Q1 connects supply voltage by the 6th resistance；The emitter stage of the first triode Q1
The 14th resistance R14 first end, the tenth electric capacity C10 first end, the 13rd resistance R13 first end is connected respectively；It is described
14th resistance R14 the second end, the second end of the tenth electric capacity C10 are grounded respectively；The second of the 13rd resistance R13
End passes through the 15th resistance R15 ground connection；
The base stage of first triode is connected with the negative pole of first diode；The emitter stage of first triode
It is connected with the positive pole of first diode.
Cascode level amplifying circuit 17 is specially：
Second triode Q2, the second triode Q2 base stage is the input of cascode level amplifying circuit；
The output end of the extremely described cascode level amplifying circuit of the current collection of the second triode Q2；
The colelctor electrode of the second triode Q2 is connected by the 8th resistance with the supply voltage；
The grounded emitter of the second triode Q2.
The detection circuit also includes：
4th electric capacity C4 and the 5th electric capacity C5,
First end and the positive pole connection supply voltage of the 5th electric capacity C5 that the 4th electricity C4 holds；
The second end of the 4th electric capacity C4 and the negative pole ground connection of the 5th electric capacity C5.
Shown in circuit simulation schematic diagram 3 described in the utility model.Wherein, big signal input:Input signal 1V, emulation knot
Fruit is as shown in Figure 4；Big signal input:Input signal 1mV, simulation result is as shown in Figure 5.
In circuit of the present utility model, left and right acoustic channels are added to by C1 and R2, the first high-pass filtering of C3 and R3 compositions
Amplifier input, so either L channel or R channel, can all be triggered, the cut-off frequency of high-pass filter is left for 10hz
It is right.
R1 is feedback resistance, and R1 and R2, R3 constitute the amplification of first order amplifier, and multiplication factor G1=R1/R2=50, C2 are
Weakening electric capacity, prevents amplifier self-excitation, and R5 is positive pole input resistance.
R9 and R12 partial pressures constitute the bias voltage of the first order and second level amplifier, and C8 is the decoupling capacitance of bias voltage.
R4 and C6 constitute the second high-pass filtering, by frequency be 10hz or so.
R7 is feedback resistance, and G2=R7/R4=20, C7 is also weakening electric capacity, prevents self-excitation, R11 be input resistance .C4 and
C5 is the decoupling capacitance of whole amplifier.
R10 and C9 constitutes the 3rd high-pass filtering circuit of output.
D1 improves input offset voltage, it is ensured that the amplitude of output signal is undistorted, and front end signal constitutes one-level by Q1 and is total to
Current collection level penetrates level and follows circuit.R6 is the biasing resistor of current collection level, and R14 is output resistance, and C10 is buffering electric capacity, prevents front end
Input has slight fluctuations, and rear end output can beat back and forth, have individual cushioning effect after increase C10, it is ensured that back segment output is stable.R13
It is the divider resistance of Q1 input offset voltage with R15.
Q2 and R8 constitute the amplifying circuit of a cascode level, after output signal is amplified by Audio_Detect export to
The I/O of single-chip microcomputer is detected.Single-chip microcomputer can be according to the audio inspection to the left channel audio signal and right channel audio signal
Signal is surveyed, is handled accordingly.
Specially：When normal use, if without external audio insertion, now system default is using other
Audio source signal.After outside wireline audio source signal is inserted, the presence or absence of outside wireline audio signal source can be detected, judgement is
It is no to need to be switched to outside wire signal.
Because music signal is superimposed by multi-signal, if music, then pass through the blocking of amplifier front end
Electric capacity, subsequently into amplifier, is enlarged into pulse signal.In order to prevent the saturation of amplifier and influence to front end input signal,
Two-stage amplification is selected, the pulse signal after amplification goes to control the conducting of triode.If triggered using one-level triode, it can lead
When causing small-signal input, the charging interval is long, and influence judges, so increase one-level triode judges.After triode Q1, letter
Number by the bufferings of C4 bulky capacitors, then by triode Q2 after, go to trigger single-chip microcomputer.
When normally being inputted without outside wireline audio signal, Audio_Detect pins are height output；When there is outside wired sound
When frequency signal is inputted, Audio_Detec is output as low level.
As shown in fig. 6, the application scenarios of the detection circuit for audio input signal described in the utility model.Single-chip microcomputer leads to
Height conversion is crossed to judge whether to need that the audio input source of power amplifier is switched to outside wireline audio input or other wireless
Input, so as to realize that source signal automatically switches.Meanwhile, can be according to the presence or absence of outside wired input source signal, to judge machine
Whether bluetooth or WIFI should be closed, allow machine to enter holding state, so as to better meet managing power consumption regulation, preferably
Management system energy consumption, especially for internal battery product, energy consumption can be saved well, extends reproduction time.
Using the circuit, it is possible to achieve by judging the presence or absence of outside wired input audio signal, carry out automatic switching signal
Source, it is to avoid manually operated, so as to realize more preferable Consumer's Experience.Meanwhile, can be by judging having for outside wireline audio signal
Nothing, to manage machine power consumption, so that managing power consumption is better achieved., for portable internal battery product, can preferably prolong
Long reproduction time, improves the use quality of whole product.The accuracy of detection of this circuit can reach 1mv, be detected using amplifier,
Integrated level is high, and debugging is convenient, and reliability is also ensured well.
Automatically switched according to present broadcast source, when using wireless source signal, wireless module is to detect in itself
Arrive, can thus control corresponding wireless source signal.But the detection of wire signal will be problematic.It is of the present utility model
Circuit design is used for detecting wire signal, is detected with an integrated transporting discharging, compared with the detection circuit of separation original paper, stability
More preferably, accuracy of detection is higher, and circuit debugging is more convenient.This circuit can also be used as the detection of system standby and shutdown.If
The wired input signal of system has stopped playing, while wireless music source does not have signal input, it is possible to allow system to enter automatically
Enter holding state, after standby certain time, music source do not detected also, it is possible to allow system closedown, reach the purpose of power saving,
Managing power consumption regulation can also be preferably met simultaneously.
Preferred embodiment of the present utility model is the foregoing is only, protection model of the present utility model is not intended to limit
Enclose.Protection domain of the present utility model should be defined by scope of the claims.
Claims (10)
1. a kind of detection circuit of audio input signal, it is characterised in that including：
First high pass filter unit, two inputs of first high-pass filter connect left channel audio signal and the right side respectively
Channel audio signal；
First order amplifier unit, the negative input end of the first order amplifier unit connects the output of first high pass filter unit
End；The positive input terminal of the first order amplifier unit inputs the first bias voltage；The output end of the first order amplifier unit connects
Connect the input of the second high pass filter unit；
Second level amplifier unit, the negative input end of the second level amplifier unit connects the output of second high pass filter unit
End；The positive input terminal of the second level amplifier unit inputs the second bias voltage；
3rd high pass filter unit, the input of the 3rd high pass filter unit connects the output of the second level amplifier unit
End；
Current collection level penetrates level and follows circuit altogether, and the level of current collection altogether penetrates level and follows the input of circuit to connect the 3rd high-pass filtering
The output end of unit；
Cascode level amplifying circuit, the input connection level of current collection altogether of the amplifying circuit of the cascode level penetrates level and follows circuit
Output end, the output end output of the amplifying circuit of cascode level is to the left channel audio signal and right channel audio signal
Audio detection signal.
2. circuit according to claim 1, it is characterised in that the first high pass filter unit is specially：
The first end of first electric capacity is the first input end of first high pass filter unit；The first end of second electric capacity is described
Second input of the first high pass filter unit；
Second end of first electric capacity connects the first end of second resistance；The second end connection 3rd resistor of second electric capacity
First end；
Second end of the second resistance and the second end connection of the 3rd resistor, are used as first high pass filter unit
Output end.
3. circuit according to claim 1, it is characterised in that the first order amplifier unit is specially：
First operational amplifier, the negative input end of first operational amplifier is the negative input of the first order amplifier unit
End；The positive input terminal of first operational amplifier is the positive input terminal of the first order amplifier unit；First computing is put
The output end of big device is the output end of the first order amplifier unit；
The negative input end of first operational amplifier connects the first end of first resistor and the first end of the second electric capacity respectively；Institute
The output end for stating the first operational amplifier connects the second end of first resistor and the second end of the second electric capacity respectively.
4. circuit according to claim 1, it is characterised in that output first bias voltage and output described second are inclined
The circuit for putting voltage is specially：
The first end connection supply voltage of 9th resistance；
The positive pole and the first end downlink connection of the 12nd resistance of second end of the 9th resistance respectively with the 8th electric capacity；Described
The second end ground connection of the negative pole of eight electric capacity and the 12nd resistance；
Second end of the 9th resistance exports first bias voltage by the 5th resistance；
Second end of the 9th resistance exports second bias voltage by the 11st resistance.
5. circuit according to claim 1, it is characterised in that second high pass filter unit is specially：
The first end of 4th resistance as second high pass filter unit input；The second end connection of 4th resistance
The first end of 6th electric capacity；
Second end of the 6th electric capacity is the output end of the second high pass filter unit.
6. circuit according to claim 1, it is characterised in that the second level amplifier unit is specially：
Second operational amplifier, the negative input end of second operational amplifier is the negative input of the second level amplifier unit
End；The positive input terminal of second operational amplifier is the positive input terminal of the second level amplifier unit；Second computing is put
The output end of big device is the output end of the second level amplifier unit；
The negative input end of second operational amplifier connects the first end of the 7th resistance and the first end of the 7th electric capacity respectively；Institute
The output end for stating the second operational amplifier connects the second end of the 7th resistance and the second end of the 7th electric capacity respectively.
7. circuit according to claim 1, it is characterised in that the 3rd high pass filter unit is specially：
The first end of tenth resistance as the 3rd high pass filter unit input；The second end connection of tenth resistance
The first end of 9th electric capacity；Second end of the 9th electric capacity is the output end of the 3rd high pass filter unit.
8. circuit according to claim 1, it is characterised in that the level of current collection altogether penetrates level and follows the circuit to be specially：
First triode, the base stage of first triode penetrates the input that level follows circuit as the level of current collection altogether；It is described
The colelctor electrode of first triode connects supply voltage by the 6th resistance；The emitter stage of first triode connects the tenth respectively
The first end of four resistance, the first end of the tenth electric capacity, the first end of the 13rd resistance；Second end of the 14th resistance, institute
The second end for stating the tenth electric capacity is grounded respectively；Second end of the 13rd resistance passes through the 15th resistance eutral grounding；
The base stage of first triode is connected with the negative pole of the first diode；The emitter stage of first triode and described the
The positive pole connection of one diode.
9. circuit according to claim 1, it is characterised in that the cascode level amplifying circuit is specially：
Second triode, the base stage of second triode is the input of cascode level amplifying circuit；
The output end of the extremely described cascode level amplifying circuit of the current collection of second triode；
The colelctor electrode of second triode is connected by the 8th resistance with supply voltage；
The grounded emitter of second triode.
10. circuit according to claim 1, it is characterised in that the detection circuit also includes：
4th electric capacity and the 5th electric capacity,
The first end of 4th electric capacity and the positive pole connection supply voltage of the 5th electric capacity；
Second end of the 4th electric capacity and the negative pole ground connection of the 5th electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620993096.0U CN206533545U (en) | 2016-08-30 | 2016-08-30 | A kind of detection circuit of audio input signal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620993096.0U CN206533545U (en) | 2016-08-30 | 2016-08-30 | A kind of detection circuit of audio input signal |
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| Publication Number | Publication Date |
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| CN206533545U true CN206533545U (en) | 2017-09-29 |
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| CN201620993096.0U Withdrawn - After Issue CN206533545U (en) | 2016-08-30 | 2016-08-30 | A kind of detection circuit of audio input signal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106375923A (en) * | 2016-08-30 | 2017-02-01 | 歌尔科技有限公司 | Detection circuit for audio input signals |
-
2016
- 2016-08-30 CN CN201620993096.0U patent/CN206533545U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106375923A (en) * | 2016-08-30 | 2017-02-01 | 歌尔科技有限公司 | Detection circuit for audio input signals |
| CN106375923B (en) * | 2016-08-30 | 2021-12-31 | 歌尔科技有限公司 | Detection circuit of audio input signal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170929 Effective date of abandoning: 20211231 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20170929 Effective date of abandoning: 20211231 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |