CN101986668B - Circuit and method for eliminating POP tone in dual-mode handset earphone communication - Google Patents
Circuit and method for eliminating POP tone in dual-mode handset earphone communication Download PDFInfo
- Publication number
- CN101986668B CN101986668B CN201010278788.4A CN201010278788A CN101986668B CN 101986668 B CN101986668 B CN 101986668B CN 201010278788 A CN201010278788 A CN 201010278788A CN 101986668 B CN101986668 B CN 101986668B
- Authority
- CN
- China
- Prior art keywords
- analog switch
- dual
- way analog
- resistance
- circuit
- 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.)
- Active
Links
Abstract
The invention provides a circuit and method for eliminating POP tone in dual-mode handset earphone communication. The circuit comprises 4 high-pass filter circuits and a dual-way analog switch, wherein one end of the first high-pass filter circuit and one end of the second high-pass filter circuit are respectively connected with the audio signal end of a code division multiple access (CDMA) earphone, while the other end of the first high-pass filter circuit and the other end of the second high-pass filter circuit are respectively connected with a signal ground through a resistor R5 and a resistor R6 and are also respectively connected with the normally open pin of the dual-way analog switch; one end of the third high-pass filter circuit and one end of the fourth high-pass filter circuit are respectively connected with the audio signal end of a global system for mobile communication (GSM) earphone, while the other end of the third high-pass filter circuit and the other end of the fourth high-pass filter circuit are respectively connected with the signal ground through a resistor R7 and a resistor R8 and are also respectively connected with the normally closed pin of the dual-way analog switch; and the first control end of the dual-way analog switch is connected with the second control end of the dual-way analog. In the invention, the problem of POP tone in dual-mode handset earphone communication is solved, thus improving subscriber experience, reducing the cost and simultaneously enhancing the product competitiveness.
Description
Technical field
The present invention relates to mobile phone technique field, relate in particular to a kind of circuit and method of eliminating POP tone in dual-mode handset earphone communication.
Background technology
In the use of mobile phone, call is one of its topmost application all the time, so the quality of tonequality directly affects user's impression, also directly affects the overall evaluation of user to mobile phone, and then affects user to the selection of mobile phone and brand loyalty.
In the mobile phone scheme of current main flow, the output of earpiece audio is all the audio signal of an interchange that superposes in a stable DC component, then through capacitance filtering DC component, obtains final AC audio signal and output to earphone.The advantage of this scheme is need not process at mobile phone base band chip end the AC audio signal that contains negative voltage, thereby has saved a negative supply and interlock circuit thereof, reduces and realizes difficulty and cost.But the shortcoming of this scheme is when opening earphone output at every turn, on capacitance except normally outputing to the audio signal of earphone, also has the saltus step of a DC component, the saltus step of this DC component outputs to earphone one side through capacitance and just shows as an amplitude at the small-pulse effect of tens mV, ear will hear " " a sound, namely so-called POP sound, has a strong impact on user's impression, also likely user's ear is caused to potential injury.
In fact, as long as there is larger DC level saltus step all can occur POP sound on capacitance, this phenomenon will frequently run on the dual-mode handset that adopts two platforms.The DC component of exporting such as the Feature phone earphone of MTK is 1.4V, and the earphone output DC component of high-pass platform has 1V, the multiple situation such as 1.25V, like this at the GSM based on MTK and high-pass platform, if only simply carry out switched audio signal with an analog switch on CDMA dual-mode handset, just there will be not only when call is set up capacitance one end to there will be from 0V to 1.4V (MTK platform) or 0V to the saltus step of 1V (high pass QSC6085 platform), thereby there is POP sound, when also can switch, also there will be POP sound (be switched to 1V or be switched to 1.4V from 1V from 1.4V) between GSM and CDMA, allow user feel to feel bad very much.
Summary of the invention
The circuit and the method that the object of the present invention is to provide a kind of GSM based on MTK and high-pass platform, CDMA dual-mode handset when earphone is conversed and eliminate POP sound when GSM and CDMA mutually switch.Also be applicable to that earphone output dc voltage component is different simultaneously, the dual-mode handset POP mail topic of AC audio signal amplitude between ± 0.4V.
The embodiment of the present invention is to realize like this, a kind of circuit of eliminating POP tone in dual-mode handset earphone communication, comprise 4 road high-pass filtering circuits, two-way analog switch, 1st, one end of 2 road high-pass filtering circuits is connected with CDMA earpiece audio signal end respectively, the other end connects signal ground through resistance R 5, resistance R 6 respectively, and the other end of described the 1st, 2 road high-pass filtering circuits is also connected with the Chang Kaiguan pin of described two-way analog switch respectively; 3rd, one end of 4 road high-pass filtering circuits is connected with GSM earpiece audio signal end respectively, the other end connects signal ground through resistance R 7, resistance R 8 respectively, and the other end of described the 3rd, 4 road high-pass filtering circuits is also connected with the normally closed pin of described two-way analog switch respectively; The first control end IN1 of described two-way analog switch is connected with the second control end IN2.
Wherein, described 4 road high-pass filtering circuits, every road high-pass filtering circuit is formed by 1 resistance and 1 capacitance serial connection.
Wherein, the common pin of described two-way analog switch difference lug machine end left and right sound track signals end.
Wherein, also comprise two-way analog switch protective circuit, described two-way analog switch protective circuit comprises resistance R 9 and resistance R 10, the power supply VDD of a termination two-way analog switch of described resistance R 9, the power supply input pin VCC of another termination analog switch; The signal ground pin GND of one termination analog switch of resistance R 10, another termination signal ground.
Wherein, the two-way analog switch that described two-way analog switch is low on-resistance, conducting resistance is below 1 ohm.
A kind of method of eliminating POP tone in dual-mode handset earphone communication, by adopting two-way analog switch, when dual-mode handset earphone is conversed, by controlling two-way analog switch control end, handset audio path is switched to associative mode, after utilizing quick charge loop to charge to capacitance, then by controlling two-way analog switch control end, handset audio path is switched to another pattern.
Wherein, described quick charge loop when having DC component to export when the earpiece audio output of mobile phone, makes direct voltage on capacitance reach the voltage levvl of the earpiece audio output of mobile phone.
Wherein, described dual-mode handset is GSM, CDMA pattern mobile phone.
Wherein, the two-way analog switch that described two-way analog switch is low on-resistance, conducting resistance is below 1 ohm.
The embodiment of the present invention compared with prior art; beneficial effect is: the present invention is by adopting the analog switch of two-way; capacitance is put into before analog switch; and introduce quick charge loop and analog switch protective circuit; thereby solve GSM, CDMA POP tone in dual-mode handset earphone communication problem; improve user's experience, reduce costs, also improved the competitiveness of product simultaneously.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams that the present invention eliminates POP tone in dual-mode handset earphone communication.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
As shown in Figure 1, the present invention has adopted a two-way analog switch S1, it has two to control pin, be IN1 and the IN2 pin in schematic diagram, this analog switch can be separately or is switched two paths of signals simultaneously, because the left and right sound track signals of earphone is sent together, need to switch simultaneously, the present invention is connected together IN1 and IN2 as SWITCH_CONTROL end, when realizing two paths of signals, switches.COM1 and COM2 pin are the common pin of analog switch S1, the left and right acoustic channels of difference lug machine end, and in the present invention, the right-channel signals EARPHONE_R of COM1 lug machine end, the left channel signals EARPHONE_L of COM2 lug machine end.NO1 and NO2 are the Chang Kaiguan pin of analog switch S1, power on acquiescence and not conducting of common pin (COM), and NC1 and NC2 are the normally closed pin of analog switch S1, after powering on, acquiescence is and the conducting of COM pin.COM1 under the control of IN1, can select with NC1 conducting or and NO1 conducting, COM1 and NC1 conducting when IN1 is low level, COM1 and NO1 conducting when IN1 is high level.COM2 under the control of IN2, can select with NC2 conducting or and NO2 conducting, COM2 and NC2 conducting when IN2 is low level, COM1 and NO2 conducting when IN2 is high level.VCC pin is the power pin of analog switch S1, and GND is the signal ground pin of analog switch S1.
Circuit of the present invention specifically implements principle and method is as follows:
1) the present invention receives the earpiece audio signal input of No. 4 mobile phones: the 1st group of CDMA stereophone audio signal being comprised of CDMA_EARPHONER, CDMA_EARPHONEL; The 2nd group of GSM stereophone audio signal being formed by GSM_EARPHONER, GSM_EARPHONEL.
2) the present invention comprises 4 road high-pass filtering circuits.The 1st routing resistance R1 and capacitance C1 form, R1 mono-termination CDMA_EARPHONEL, another termination C1, C1 mono-termination R1, the NO1 pin of another termination R5 and analog switch S1;
The 2nd routing resistance R2 and capacitance C2 form, R2 mono-termination CDMA_EARPHONER, another termination C2, C2 mono-termination R2, the NO2 pin of another termination R6 and analog switch S1;
The 3rd routing resistance R3 and capacitance C3 form, R3 mono-termination GSM_EARPHONEL, another termination C3, C3 mono-termination R3, the NC2 pin of another termination R7 and analog switch S1;
The 4th routing resistance R4 and capacitance C4 form, R4 mono-termination GSM_EARPHONER, another termination C4, C4 mono-termination R4, the NC1 pin of another termination R8 and analog switch S1;
High-pass filtering circuit realize principle, take the 1st tunnel is example: R1, the impedance of C1 and earphone itself has just formed a high pass filter together, its corner frequency is:
Wherein: π is circumference ratio, the impedance that the resistance of R size is R1 resistance and the corresponding sound channel of earphone itself with (impedance of different earphones has difference).Such as, when the resistance of R1 is 100 ohm, the value of C1 is 22UF, and the impedance of earphone is 32 ohm, and corresponding corner frequency is 54.83HZ, and because the audibility range of people's ear is 20-20KHz, so this frequency is minimum to the loss of tonequality.
3) the present invention comprises 4 quick charge loops, tunnel, connects as follows:
The 1st routing resistance R1, capacitance C1, resistance R 5 form, R1 mono-termination CDMA_EARPHONEL, another termination C1, C1 mono-termination R1, the NO1 pin of another termination R5 and analog switch S1, R5 mono-termination R1, another termination signal ground;
The 2nd routing resistance R2, capacitance C2, resistance R 6 form, R2 mono-termination CDMA_EARPHONER, another termination C2, C2 mono-termination R2, the NO1 pin of another termination R6 and analog switch S1, R6 mono-termination R2, another termination signal ground;
The 3rd routing resistance R3, capacitance C3, resistance R 7 form, R3 mono-termination GSM_EARPHONEL, another termination C3, C3 mono-termination R3, the NC2 pin of another termination R7 and analog switch S1, R7 mono-termination C3, another termination signal ground;
The 4th routing resistance R4, capacitance C4, R8 form, R4 mono-termination GSM_EARPHONER, another termination C4, C4 mono-termination R4, the NC1 pin of another termination R8 and analog switch S1, R8 mono-termination C4, another termination signal ground;
The effect in quick charge loop is when the earpiece audio output of mobile phone has DC component output, make as soon as possible direct voltage on capacitance reach the voltage levvl of the earpiece audio output of mobile phone, after switching so more in the past, on capacitance, just there is no the instantaneous abrupt change of direct voltage, earphone end just be can't hear POP sound like this.Take the 1st tunnel is example, and when R1 left end adds a DC level, R1, C1, R5 have just formed a charge circuit, and according to Circuit theory, general RC circuit generally just can reach the level that relatively approaches added DC level after 3.3 RC time constants.
Equally, take the 1st tunnel is example, and the value of R and C is as follows: R=R1+R5, C=C1.
After the earpiece audio output of mobile phone has 3.3 RC time constants of output, again analog switch is switched to audio signal and the conducting of earphone end that makes in the past mobile phone output, allow earphone end have voice output, so just eliminated POP sound.
4) principle of the POP of disappearing sound of the present invention: when the earphone end of GSM mobile handset will have audio frequency output, first the IN1 of analog switch and IN2 are driven as high level, be that voice-frequency channel is switched to CDMA end, utilize above-mentioned the 3rd road and the 4th quick charge loop, tunnel to capacitance C3, C4 charges, according to Circuit theory, DC level after general 3.3 RC time constants on capacitance can be set up, therefore after 3.3 RC time constants, DC level on capacitance C3 and C4 is set up substantially, at this moment again analog switch IN1 and IN2 are driven as low level, even if voice-frequency channel is switched to GSM side, at this moment GSM just can normal talking, and there is no POP sound.As a same reason, when the earphone end of CDMA mobile phone will have audio frequency output, first the IN1 of analog switch and IN2 are driven as low level, be that voice-frequency channel is switched to GSM end, utilize above-mentioned the 1st road and the 2nd quick charge loop, tunnel to charge to capacitance C1, C2, also be after 3.3 RC time constants, DC level on capacitance C1 and C2 is set up substantially, at this moment again analog switch IN1 and IN2 are driven as high level, even if voice-frequency channel is switched to CDMA end, at this moment CDMA just can normal talking, and there is no POP sound.At Three-Way Calling, (be that GSM and CDMA set up after call simultaneously, GSM or CDMA be a kind of hold mode that is in wherein) process in, because the DC level of MTK platform is 1.4V, and the DC level of high-pass platform is 1V or 1.25V, if do not adopt circuit of the present invention, when being switched to GSM, CDMA just having a saltus step from 1V or 1.25V to 1.4V so on capacitance, when being switched to CDMA, GSM on capacitance, just having one from 1.4V to 1V or the saltus step of 1.25V, so also have POP sound, adopt after circuit of the present invention, before each switching, there is quick charge loop to charging every straight electricity, and coordinate the accurate delay (3.3 RC time constants) of software to control, just can eliminate the POP sound under various service conditions.
5) well-known, cmos circuit has requirement to input voltage, is generally that requirement input voltage is greater than signal ground voltage and is less than the voltage of power supply, otherwise will enters LATCH-UP state, and then form large electric current and burn chip.Due to cost and technology, can be difficult to do by the cmos analog switch of be less than-0.5V voltage, cause on market actually rarely, and price is very expensive.But analog switch that in the market can mistake-0.4V negative voltage has a lot, and price is relatively very cheap, according to the characteristic of our cell phone platform and scheme, in the present invention, after capacitance, be all not less than-0.15V of the negative pressure of earphone signal part, and the analog switch that the present invention uses is the analog switch of energy mistake-0.4V negative pressure, have the derate that twice is many, thus in fact to tonequality be do not have influential.But for the purpose of reliable; the present invention has increased protective circuit; be R9, R10; because it is to have large current path that LATCH-UP burns the main cause of circuit, and the present invention has increased by two current-limiting resistances cleverly, just in case have that input voltage is less than that analog switch can bear-0.4V; effect due to current-limiting resistance; electric current is very little, and after be greater than at voltage-0.4V, analog switch can recover normal work again, and then has protected whole circuit reliably working.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a circuit of eliminating POP tone in dual-mode handset earphone communication, it is characterized in that, comprise 4 road high-pass filtering circuits, two-way analog switch, 1st, one end of 2 road high-pass filtering circuits is connected with CDMA earpiece audio signal end respectively, the other end connects signal ground through resistance R 5, resistance R 6 respectively, and the other end of described the 1st, 2 road high-pass filtering circuits is also connected with the Chang Kaiguan pin of described two-way analog switch respectively; 3rd, one end of 4 road high-pass filtering circuits is connected with GSM earpiece audio signal end respectively, the other end connects signal ground through resistance R 7, resistance R 8 respectively, and the other end of described the 3rd, 4 road high-pass filtering circuits is also connected with the normally closed pin of described two-way analog switch respectively; First control end (IN1) of described two-way analog switch is connected with the second control end (IN2);
Wherein, when GSM earpiece audio signal end has audio frequency output, by described two-way analog switch, voice-frequency channel being switched to described CDMA holds, after the capacitance charging of described the 3rd, 4 road high-pass filtering circuits, then by described two-way analog switch, described voice-frequency channel is switched to described GSM and hold; Or,
When CDMA earpiece audio signal end has audio frequency output, by described two-way analog switch, voice-frequency channel being switched to described GSM holds, after the capacitance charging of described the 1st, 2 road high-pass filtering circuits, then by described two-way analog switch, described voice-frequency channel is switched to described CDMA and hold.
2. the circuit of elimination POP tone in dual-mode handset earphone communication as claimed in claim 1, is characterized in that, described 4 road high-pass filtering circuits, and every road high-pass filtering circuit is formed by 1 resistance and 1 capacitance serial connection.
3. the circuit of elimination POP tone in dual-mode handset earphone communication as claimed in claim 2, is characterized in that, the common pin of described two-way analog switch is lug machine end left and right sound track signals end respectively.
4. the circuit of elimination POP tone in dual-mode handset earphone communication as claimed in claim 2, it is characterized in that, also comprise two-way analog switch protective circuit, described two-way analog switch protective circuit comprises resistance R 9 and resistance R 10, the power supply (VDD) of one termination two-way analog switch of described resistance R 9, the power supply input pin (VCC) of another termination analog switch; The signal ground pin (GND) of one termination analog switch of resistance R 10, another termination signal ground.
5. the circuit of elimination POP tone in dual-mode handset earphone communication as claimed in claim 2, is characterized in that, described dual-mode handset is GSM, CDMA pattern mobile phone.
6. the circuit of the elimination POP tone in dual-mode handset earphone communication as described in claim 1 to 5 any one, is characterized in that, the two-way analog switch that described two-way analog switch is low on-resistance, and conducting resistance is below 1 ohm.
7. a method of eliminating POP tone in dual-mode handset earphone communication, it is characterized in that, by adopting two-way analog switch, when dual-mode handset earphone is conversed, by controlling two-way analog switch control end, handset audio path is switched to associative mode, after utilizing quick charge loop to charge to capacitance, then by controlling two-way analog switch control end, handset audio path is switched to another pattern.
8. the method for elimination POP tone in dual-mode handset earphone communication as claimed in claim 7, it is characterized in that, described quick charge loop when having DC component to export when the earpiece audio output of mobile phone, makes direct voltage on capacitance reach the voltage levvl of the earpiece audio output of mobile phone.
9. the method for elimination POP tone in dual-mode handset earphone communication as claimed in claim 8, is characterized in that, described dual-mode handset is GSM, CDMA pattern mobile phone.
10. the method for the elimination POP tone in dual-mode handset earphone communication as described in claim 7 to 9 any one, is characterized in that, the two-way analog switch that described two-way analog switch is low on-resistance, and conducting resistance is below 1 ohm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010278788.4A CN101986668B (en) | 2010-09-03 | 2010-09-03 | Circuit and method for eliminating POP tone in dual-mode handset earphone communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010278788.4A CN101986668B (en) | 2010-09-03 | 2010-09-03 | Circuit and method for eliminating POP tone in dual-mode handset earphone communication |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101986668A CN101986668A (en) | 2011-03-16 |
| CN101986668B true CN101986668B (en) | 2014-11-26 |
Family
ID=43710970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010278788.4A Active CN101986668B (en) | 2010-09-03 | 2010-09-03 | Circuit and method for eliminating POP tone in dual-mode handset earphone communication |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101986668B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103237281B (en) * | 2013-05-08 | 2016-07-06 | 广东欧珀移动通信有限公司 | The earphone line control circuit of a kind of mobile terminal and line control method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101350593A (en) * | 2008-08-26 | 2009-01-21 | 四川登巅微电子有限公司 | Circuit for suppressing POP noise |
| CN201403188Y (en) * | 2009-04-15 | 2010-02-10 | 信华精机有限公司 | POP noise suppression circuit |
| 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 |
-
2010
- 2010-09-03 CN CN201010278788.4A patent/CN101986668B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101350593A (en) * | 2008-08-26 | 2009-01-21 | 四川登巅微电子有限公司 | Circuit for suppressing POP noise |
| CN201403188Y (en) * | 2009-04-15 | 2010-02-10 | 信华精机有限公司 | POP noise suppression circuit |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101986668A (en) | 2011-03-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201142743Y (en) | Headphone interface circuit and mobile phone with the same | |
| CN102821195A (en) | Terminal and multi-audio-frequency output method | |
| CN101742383B (en) | Device and method for eliminating plosives of headset | |
| CN202872884U (en) | Audio output circuit and mobile terminal | |
| CN201774654U (en) | Wire headset circuit based on mobile phone four-section connection | |
| CN102006028A (en) | Impedance matching method and circuit | |
| CN107786741A (en) | A kind of HAC systems and its implementation based on mobile terminal | |
| CN102694533A (en) | Switch and switch circuit using the same | |
| CN205249263U (en) | Bluetooth routing equipment based on bluetooth car kit | |
| CN101986668B (en) | Circuit and method for eliminating POP tone in dual-mode handset earphone communication | |
| CN205620939U (en) | Wearable equipment of intelligence | |
| CN101710911B (en) | Device for realizing audio switchover by using analog switch | |
| CN102332881B (en) | Headset volume control circuit of key general mobile phone | |
| CN107864422A (en) | Playback equipment and the player method based on playback equipment | |
| CN107800853B (en) | Memory, mobile phone, audio circuit thereof and method for externally playing audio file | |
| CN102056052A (en) | Audio switching circuit and mobile terminal with same | |
| CN204578726U (en) | A kind of earphone line control circuit and earphone | |
| CN205812113U (en) | A kind of terminal unit | |
| CN205726353U (en) | A kind of charging earphone Dolby circuit | |
| CN205726284U (en) | Intelligent earphone | |
| CN202425003U (en) | Earphone device capable of switching signal transmission | |
| CN202841218U (en) | USB interface apparatus and mobile phone | |
| CN204616061U (en) | Intelligent mobile equipment earphone control device | |
| CN206757323U (en) | A kind of control circuit and separate type call bracelet for separate type call bracelet | |
| CN202111666U (en) | Voice circuit with high-frequency filter function and mobile terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 518057 Nanshan District science and Technology Industrial Park, Guangdong Province, high tech Industrial Park, No. 6 South Road, building No. 29, South Block, layer 6 Patentee after: Nubian Technologies Ltd. Address before: 518057 Nanshan District science and Technology Industrial Park, Guangdong Province, high tech Industrial Park, No. 6 South Road, building No. 29, South Block, layer 6 Patentee before: Shenzhen ZTE Mobile Tech Co., Ltd. |
|
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 518057 Guangdong Province, Shenzhen high tech Zone of Nanshan District City, No. 9018 North Central Avenue's innovation building A, 6-8 layer, 10-11 layer, B layer, C District 6-10 District 6 floor Patentee after: Nubian Technologies Ltd. Address before: 518057 Nanshan District science and Technology Industrial Park, Guangdong Province, high tech Industrial Park, No. 6 South Road, building No. 29, South Block, layer 6 Patentee before: Nubian Technologies Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201023 Address after: 215200 No. 1188 west two ring road, Shengze Town, Wujiang District, Suzhou, Jiangsu. Patentee after: Suzhou Shengze science and Technology Pioneer Park Development Co.,Ltd. Address before: 518057 Guangdong Province, Shenzhen high tech Zone of Nanshan District City, No. 9018 North Central Avenue's innovation building A, 6-8 layer, 10-11 layer, B layer, C District 6-10 District 6 floor Patentee before: NUBIA TECHNOLOGY Co.,Ltd. |