CN201887821U - PCB (printed circuit board) wiring circuit for restraining TDD (time division duplex) noise of cell phone - Google Patents
PCB (printed circuit board) wiring circuit for restraining TDD (time division duplex) noise of cell phone Download PDFInfo
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- CN201887821U CN201887821U CN2010205854994U CN201020585499U CN201887821U CN 201887821 U CN201887821 U CN 201887821U CN 2010205854994 U CN2010205854994 U CN 2010205854994U CN 201020585499 U CN201020585499 U CN 201020585499U CN 201887821 U CN201887821 U CN 201887821U
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Abstract
The utility model relates to a PCB (printed circuit board) wiring circuit for restraining TDD (time division duplex) noise of a cell phone, which is arranged on the PCB, the PCB wiring of the non-inverting input end and the inverted input end of an audio amplifier U1 in the circuit is a difference wires which are identical in length, thickness, and distance between wires, and parallel and adjacent; most of the TDD noise interference is accessed into by the input wire of the audio amplifier, the backflow generated by a GSM in operation interferes and flows through the difference wires, as the difference wires are symmetrical, the interference signal is definitely and evenly accessed into the difference wires so as to form a common-mode signal, and the common-mode signal is sent to the non-inverting input end and the inverting input end of the audio amplifier, and inverting summing is carried out in the audio amplifier, signals of the same modeling value and opposite phase position are offset, non-interference audio signal is output at the output end finally, so that the TDD interference is lowered to the minimum.
Description
Technical field
The utility model relates to a kind of PCB and walks line circuit, particularly relates to a kind of PCB that suppresses mobile phone TDD noise and walks line circuit.
Background technology:
All there is the either large or small timesharing distortion noise TDD NOISE (abbreviation of English Time Division Distortion noise) that produces because of time division multiple access TDMA (abbreviation of English Time Division Multiple Access) working method in the mobile phone of at present all GSM standards, and influences speech quality.The TDMA of GSM mobile handset has two kinds of conflicting modes to the influence of mobile phone speech quality: a kind of is the machinery noise that the vibration of the piezoelectric device that causes owing to the TDD ripple or magnetic element produces; Thereby another kind is to be crosstalked into audio frequency from circuit to cause that audio frequency amplifier produces the TDD noise, and resetting by electro-acoustic element produces.
Because the application of the TDMA mode of GSM, the radio-frequency tone audio amplifier RF PA (abbreviation of English Radio Frequency Power Amplifier) that has determined directly to be connected on the battery of mobile phone VBAT must carry out the switching that transceiver is moved with the switching frequency intermittence ground of 217HZ when talking state, power institute consumed current is bigger, thereby on VBAT, form 217 ripple voltage, undoubtedly, this ripple voltage can be back to the battery negative terminal of mobile phone by the ground of radio-frequency tone audio amplifier RF PA, because this ripple voltage electric current is in GSM900, the power maximum current is the highest, influences the most severe.The voice band line part if the ripple voltage of this VBAT last 217 and ground backflow ripple voltage are flowed through ringwise, then audio signal must seriously be disturbed, and ring-type and audio region overlapping area are big more, and ripple current is big more, then disturbs serious more.If disturbed is earphone or voice band line such as put outward, then earphone and audio frequency apparatus such as put outward and must produce more serious TDD noise.
The utility model content:
The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of PCB that suppresses mobile phone TDD noise to walk line circuit, input cabling to audio frequency amplifier carries out the isometric control of difference, do not need additionally to increase device, cost is low, simple, and very obvious to the improvement of speech qualities such as hands-free and earphone, user experience can be greatly improved.
In order to achieve the above object, the technical solution adopted in the utility model is: a kind of PCB that suppresses mobile phone TDD noise walks line circuit, be located on the mobile phone pcb board, the in-phase input end of audio frequency amplifier U1 in this circuit and the PCB cabling of inverting input are differential lines, and this differential lines be isometric, etc. equidistant, parallel and close differential lines between thick, line.
Most TDD noise jamming all is that the incoming line by audio frequency amplifier seals in, when GSM work produces ground backflow interference and flows through differential lines, because the symmetry characteristic of differential lines, interference signal will inevitably be advanced on the differential lines by impartial string, form common-mode signal, this common-mode signal is delivered to the homophase and the end of oppisite phase of amplifier respectively, end of oppisite phase at amplifier carries out anti-phase, utilize the addition principle of amplifier again, the signal that the mould value equates, phase place is opposite is cancelled out each other, in the glitch-free audio signal of the final output of output, drop to minimum thereby TDD can be disturbed.Audio frequency amplifier U1 refers to that ear is put, power amplifier and external reception amplifier, the audio frequency amplifier of mobile phone be input as true difference or false difference.
At the cabling of the in-phase input end of audio frequency amplifier U1 and inverting input is that the circuit of differential lines has three kinds of realization approach.
A kind of PCB that suppresses mobile phone TDD noise walks line circuit, the output interface of capacitor C 1 one termination source ends, other end connecting resistance R2, R2 meets the in-phase input end IN+ of audio frequency amplifier U1, capacitor C 2 one end ground connection, other end connecting resistance R3, R3 meets the inverting input IN-of audio frequency amplifier U1, resistance R 2, the resistance of R3 is zero, VDD pin one road catcher machine battery VBAT of audio frequency amplifier U1, one the tunnel connects capacitor C 5, C5 other end ground connection, CTRL pin one tunnel series resistance R1 connecting interface GPI032_ALC1 of audio frequency amplifier U1, ground connection behind one tunnel series resistance R4, ground connection behind the series capacitance C3 of another road, ground connection behind the VREF pin series capacitance C4 of audio frequency amplifier U1, the AVDD of audio frequency amplifier U1, PGND pin ground connection, meet loud speaker pin SP1 behind the OUT+ pin series inductance L1 of audio frequency amplifier U1, between inductance L 1 and loud speaker pin SP1, be connected with drop-down capacitor C 7, pull-down diode D2, drop-down static releasing member ESD2 (abbreviation of English Electro-Static discharge), C7, D2, the other end ground connection of ESD2, meet loud speaker pin SP2 behind the OUT-pin series inductance L2 of audio frequency amplifier U2, between inductance L 2 and loud speaker pin SP2, be connected with drop-down capacitor C 6, pull-down diode D1, drop-down static releasing member ESD1, C6, D1, the other end ground connection of ESD1, when the PCB layout, with capacitor C 1, C2 moves the output interface AMOUTL near the source end, capacitor C 1, two network cablings behind the C2 become isometric, Deng thick, two parallel and close differential lines.
Another kind circuit transition that a kind of PCB that suppresses mobile phone TDD noise walks line circuit is the output interface AMOUTL of resistance R 2 one termination source ends, another termination capacitor C 1, capacitor C 1 meets the in-phase input end IN+ of audio frequency amplifier U1, resistance R 3 one end ground connection, another termination capacitor C 2, capacitor C 2 meets the inverting input IN-of audio frequency amplifier U1, the resistance of resistance R 2, R3 is zero, resistance R 2, R3 and capacitor C 1, C2 will be near the source ends, and two network cablings after the capacitor C 1, C2 become isometric, etc. two thick, parallel and close differential lines.
The third circuit that makes the transition that a kind of PCB that suppresses mobile phone TDD noise walks line circuit is the output interface of resistance R 2 one termination source ends, another termination capacitor C 1, capacitor C 1 meets the in-phase input end IN+ of audio frequency amplifier U1, resistance R 3 one end ground connection, another termination capacitor C 2, capacitor C 2 meet the inverting input IN-of audio frequency amplifier U1, and the resistance of resistance R 2, R3 is non-vanishing, resistance R 2, R3 will be near the source ends, and capacitor C 1, C2 then can optionally put flexibly.That two network cablings behind two network cablings behind resistance R 2, the R3 and capacitor C 1, the C2 become is isometric, etc. two thick, parallel and close differential lines.
Compared with prior art, the beneficial effects of the utility model are: to the input cabling of audio frequency amplifier carry out difference isometric, etc. thick, parallel and near control, utilize the principle of the anti-common-mode noise of differential lines that the interference signal that enters on the differential lines is carried out filtering, do not need additionally to increase device, cost is low, simple, and very obvious to the improvement of speech qualities such as hands-free and earphone, user experience can be greatly improved.
Description of drawings:
Fig. 1 is embodiment 1 circuit theory diagrams of the present utility model;
Fig. 2 is embodiment 2 circuit theory diagrams of the present utility model;
Fig. 3 is embodiment 3 circuit theory diagrams of the present utility model.
Embodiment:
Purport of the present utility model is to overcome the deficiencies in the prior art, provide a kind of PCB that suppresses mobile phone TDD noise to walk line circuit, input cabling to audio frequency amplifier carries out the isometric control of difference, do not need additionally to increase device, cost is low, simple, and very obvious to the improvement of speech qualities such as hands-free and earphone, user experience can be greatly improved.Be elaborated with reference to accompanying drawing below in conjunction with embodiment, so that technical characterictic of the present utility model and advantage are carried out more deep annotation.
The circuit theory diagrams of embodiment 1 of the present utility model as shown in Figure 1, a kind of PCB that suppresses mobile phone TDD noise walks line circuit, be located on the mobile phone pcb board, the output interface of capacitor C 1 one termination source ends, other end connecting resistance R2, R2 meets the in-phase input end IN+ of audio frequency amplifier U1, capacitor C 2 one end ground connection, other end connecting resistance R3, R3 meets the inverting input IN-of audio frequency amplifier U1, resistance R 2, the resistance of R3 is zero, VDD pin one road catcher machine battery VBAT of audio frequency amplifier U1, one the tunnel connects capacitor C 5, C5 other end ground connection, CTRL pin one tunnel series resistance R1 connecting interface GPI032_ALC1 of audio frequency amplifier U1, ground connection behind one tunnel series resistance R4, ground connection behind the series capacitance C3 of another road, ground connection behind the VREF pin series capacitance C4 of audio frequency amplifier U1, the AVDD of audio frequency amplifier U1, PGND pin ground connection, meet loud speaker pin SP1 behind the OUT+ pin series inductance L1 of audio frequency amplifier U1, between inductance L 1 and loud speaker pin SP1, be connected with drop-down capacitor C 7, pull-down diode D2, drop-down static releasing member ESD2, C7, D2, the other end ground connection of ESD2, meet loud speaker pin SP2 behind the OUT-pin series inductance L2 of audio frequency amplifier U2, between inductance L 2 and loud speaker pin SP2, be connected with drop-down capacitor C 6, pull-down diode D1, drop-down static releasing member ESD1, C6, D1, the other end ground connection of ESD1.
When the PCB layout, with capacitor element C1 in the A picture frame, C2 moves the output interface AMOUTL near the source end, two network cablings of B picture frame become isometric, Deng thick, two parallel and close differential lines, because the symmetry characteristic of differential lines, when GSM work produces ground backflow interference and flows through differential lines, interference signal can be advanced on the differential lines by impartial string, when contiguous TDD noise jamming is come, will be radiated simultaneously on two cablings of this differential networks, form common-mode signal, this common-mode signal is delivered to homophase and the end of oppisite phase of audio frequency amplifier U1 respectively, carry out anti-phasely at the end of oppisite phase of audio frequency amplifier U1, utilize the addition principle of audio frequency amplifier U1, the mould value is equated, the signal that phase place is opposite is cancelled out each other, final on SP1 and SP2 output not with the audio signal of interference, thereby obtain good call tone quality.
Embodiment 2
The circuit theory diagrams of embodiment 2 of the present utility model as shown in Figure 2, a kind of PCB that suppresses mobile phone TDD noise walks line circuit, be located on the mobile phone pcb board, the output interface of resistance R 2 one termination source ends, another termination capacitor C 1, capacitor C 1 meets the in-phase input end IN+ of audio frequency amplifier U1, resistance R 3 one end ground connection, another termination capacitor C 2, capacitor C 2 meets the inverting input IN-of audio frequency amplifier U1, resistance R 2, the resistance of R3 is zero, VDD pin one road catcher machine battery VBAT of audio frequency amplifier U1, one the tunnel connects capacitor C 5, C5 other end ground connection, CTRL pin one tunnel series resistance R1 connecting interface GPI032_ALC1 of audio frequency amplifier U1, ground connection behind one tunnel series resistance R4, ground connection behind the series capacitance C3 of another road, ground connection behind the VREF pin series capacitance C4 of audio frequency amplifier U1, the AVDD of audio frequency amplifier U1, PGND pin ground connection, meet loud speaker pin SP1 behind the OUT+ pin series inductance L1 of audio frequency amplifier U1, between inductance L 1 and loud speaker pin SP1, be connected with drop-down capacitor C 7, pull-down diode D2, drop-down static releasing member ESD2, C7, D2, the other end ground connection of ESD2, meet loud speaker pin SP2 behind the OUT-pin series inductance L2 of audio frequency amplifier U2, between inductance L 2 and loud speaker pin SP2, be connected with drop-down capacitor C 6, pull-down diode D1, drop-down static releasing member ESD1, C6, D1, the other end ground connection of ESD1.
Compare with embodiment 1, capacitor C 1 among the figure of embodiment 2 in the A picture frame, C2 and resistance R 2, the R3 switch, when resistance R 2, when the resistance of R3 is zero, R2, device in R3 and the A picture frame all will be near the source end, two network cablings of B picture frame become isometric, Deng thick, two parallel and close differential lines, because the symmetry characteristic of differential lines, when GSM work produces ground backflow interference and flows through differential lines, interference signal can be advanced on the differential lines by impartial string, when contiguous TDD noise jamming is come, will be radiated simultaneously on two cablings of this differential networks, form common-mode signal, this common-mode signal is delivered to homophase and the end of oppisite phase of audio frequency amplifier U1 respectively, carry out anti-phasely at the end of oppisite phase of audio frequency amplifier U1, utilize the addition principle of audio frequency amplifier U1, the mould value is equated, the signal that phase place is opposite is cancelled out each other, final on SP1 and SP2 output not with the audio signal of interference, thereby obtain good call tone quality.
The circuit theory diagrams of embodiment 3 of the present utility model as shown in Figure 3, a kind of PCB that suppresses mobile phone TDD noise walks line circuit, be located on the mobile phone pcb board, the output interface of resistance R 2 one termination source ends, another termination capacitor C 1, capacitor C 1 meets the in-phase input end IN+ of audio frequency amplifier U1, resistance R 3 one end ground connection, another termination capacitor C 2, capacitor C 2 meets the inverting input IN-of audio frequency amplifier U1, VDD pin one road catcher machine battery VBAT of audio frequency amplifier U1, one the tunnel connects capacitor C 5, C5 other end ground connection, CTRL pin one tunnel series resistance R1 connecting interface GPI032_ALC1 of audio frequency amplifier U1, ground connection behind one tunnel series resistance R4, ground connection behind the series capacitance C3 of another road, ground connection behind the VREF pin series capacitance C4 of audio frequency amplifier U1, the AVDD of audio frequency amplifier U1, PGND pin ground connection, meet loud speaker pin SP1 behind the OUT+ pin series inductance L1 of audio frequency amplifier U1, between inductance L 1 and loud speaker pin SP1, be connected with drop-down capacitor C 7, pull-down diode D2, drop-down static releasing member ESD2, C7, D2, the other end ground connection of ESD2, meet loud speaker pin SP2 behind the OUT-pin series inductance L2 of audio frequency amplifier U2, between inductance L 2 and loud speaker pin SP2, be connected with drop-down capacitor C 6, pull-down diode D1, drop-down static releasing member ESD1, C6, D1, the other end ground connection of ESD1.
Compare with embodiment 2, the resistance R 2 of embodiment 3, when the resistance of R3 is non-vanishing, the device in the D picture frame will be near the source end, and capacitor C 1, C2 in the A picture frame then can optionally put flexibly.The B picture frame becomes isometric with two network cablings of C picture frame, Deng thick, two parallel and close differential lines, because the symmetry characteristic of differential lines, when GSM work produces ground backflow interference and flows through differential lines, interference signal can be advanced on the differential lines by impartial string, when contiguous TDD noise jamming is come, will be radiated simultaneously on two cablings of this differential networks, form common-mode signal, this common-mode signal is delivered to homophase and the end of oppisite phase of audio frequency amplifier U1 respectively, end of oppisite phase at audio frequency amplifier U1 carries out anti-phase, utilize the addition principle of audio frequency amplifier U1, the mould value is equated, the signal that phase place is opposite is cancelled out each other, final on SP1 and SP2 output not with the audio signal of interference, thereby obtain good call tone quality.
Although the utility model is walked line circuit by specific embodiment to the PCB that how suppresses mobile phone TDD noise and has been made clear and complete description, but the utility model is not limited only to described embodiment, by the change of simple components and parts and to utilize the differential lines principle to reach the purpose that suppresses the TDD noise be contingent and all be included among the utility model.
Claims (5)
1. a PCB who suppresses mobile phone TDD noise walks line circuit, be located on the mobile phone pcb board, it is characterized in that: the in-phase input end of the audio frequency amplifier U1 in this circuit and the PCB cabling of inverting input are differential lines, and this differential lines be isometric, etc. equidistant, parallel and close differential lines between thick, line.
2. the PCB of inhibition mobile phone TDD noise according to claim 1 walks line circuit, it is characterized in that: described differential lines is located between capacitor C 1, C2 and resistance R 2, the R3, the output interface AMOUTL of capacitor C 1 one termination source ends, other end connecting resistance R2, R2 meets the in-phase input end IN+ of audio frequency amplifier U1, capacitor C 2 one end ground connection, other end connecting resistance R3, R3 meets the inverting input IN-of audio frequency amplifier U1, the resistance of resistance R 2, R3 is zero, when the PCB layout, capacitor C 1, C2 are moved the output interface AMOUTL of close source end.
3. the PCB of inhibition mobile phone TDD noise according to claim 1 walks line circuit, it is characterized in that: described differential lines is located between the in-phase input end and inverting input interface of capacitor C 1, C2 and audio frequency amplifier U1, the output interface AMOUTL of resistance R 2 one termination source ends, another termination capacitor C 1, capacitor C 1 meets the in-phase input end IN+ of audio frequency amplifier U1, resistance R 3 one end ground connection, another termination capacitor C 2, capacitor C 2 meets the inverting input IN-of audio frequency amplifier U1, the resistance of resistance R 2, R3 is zero, and resistance R 2, R3 and capacitor C 1, C2 are near the source end.
4. the PCB of inhibition mobile phone TDD noise according to claim 1 walks line circuit, it is characterized in that: described differential lines is divided into two sections, be located at resistance R 2 for one section, R3 and capacitor C 1, between the C2, another section is located at capacitor C 1, between the in-phase input end of C2 and audio frequency amplifier U1 and the inverting input interface, the output interface AMOUTL of resistance R 2 one termination source ends, another termination capacitor C 1, capacitor C 1 meets the in-phase input end IN+ of audio frequency amplifier U1, resistance R 3 one end ground connection, another termination capacitor C 2, capacitor C 2 connects the inverting input IN-of audio frequency amplifier U1, resistance R 2, the resistance of R3 is non-vanishing, resistance R 2, R3 will be near the source end.
5. the PCB according to each described inhibition mobile phone TDD noise in the claim 1～4 walks line circuit, it is characterized in that: described audio frequency amplifier U1 refers to that ear is put, power amplifier and external reception amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205854994U CN201887821U (en) | 2010-10-28 | 2010-10-28 | PCB (printed circuit board) wiring circuit for restraining TDD (time division duplex) noise of cell phone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205854994U CN201887821U (en) | 2010-10-28 | 2010-10-28 | PCB (printed circuit board) wiring circuit for restraining TDD (time division duplex) noise of cell phone |
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| Publication Number | Publication Date |
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| CN201887821U true CN201887821U (en) | 2011-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205854994U Expired - Lifetime CN201887821U (en) | 2010-10-28 | 2010-10-28 | PCB (printed circuit board) wiring circuit for restraining TDD (time division duplex) noise of cell phone |
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| CN (1) | CN201887821U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103078653A (en) * | 2012-12-26 | 2013-05-01 | 青岛歌尔声学科技有限公司 | Circuit for Bluetooth equipment and method for retraining influence of FPC (flexible printed circuit) board on Bluetooth antenna |
| CN103841754A (en) * | 2014-02-21 | 2014-06-04 | 宇龙计算机通信科技(深圳)有限公司 | Electronic device avoiding electromagnetic interference |
| WO2016095683A1 (en) * | 2014-12-15 | 2016-06-23 | 华为技术有限公司 | Method and device for eliminating tdd noise |
| WO2016115744A1 (en) * | 2015-01-24 | 2016-07-28 | 深圳市鑫龙上通讯科技有限公司 | Tdd interference-resisting mobile communications device |
| CN106375525A (en) * | 2016-11-30 | 2017-02-01 | 深圳天珑无线科技有限公司 | Anti-jamming circuit |
| CN106487520A (en) * | 2016-11-17 | 2017-03-08 | 延锋伟世通电子科技（上海）有限公司 | A kind of vehicle-mounted ethernet circuit plate |
| CN106787623A (en) * | 2014-08-06 | 2017-05-31 | 歌尔科技有限公司 | The noise-reduction method of electronic system, electronic system and voltage conversion circuit |
| CN108234727A (en) * | 2017-11-29 | 2018-06-29 | 维沃移动通信有限公司 | A kind of noise-reduction method and mobile terminal |
| CN109711084A (en) * | 2019-01-09 | 2019-05-03 | 郑州云海信息技术有限公司 | The inspection method and relevant apparatus of Tandem devices in a kind of PCB |
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- 2010-10-28 CN CN2010205854994U patent/CN201887821U/en not_active Expired - Lifetime
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| CN103078653B (en) * | 2012-12-26 | 2015-04-22 | 青岛歌尔声学科技有限公司 | Circuit for Bluetooth equipment and method for retraining influence of FPC (flexible printed circuit) board on Bluetooth antenna |
| CN103078653A (en) * | 2012-12-26 | 2013-05-01 | 青岛歌尔声学科技有限公司 | Circuit for Bluetooth equipment and method for retraining influence of FPC (flexible printed circuit) board on Bluetooth antenna |
| CN103841754A (en) * | 2014-02-21 | 2014-06-04 | 宇龙计算机通信科技(深圳)有限公司 | Electronic device avoiding electromagnetic interference |
| CN103841754B (en) * | 2014-02-21 | 2017-01-18 | 宇龙计算机通信科技(深圳)有限公司 | Electronic device avoiding electromagnetic interference |
| CN106787623A (en) * | 2014-08-06 | 2017-05-31 | 歌尔科技有限公司 | The noise-reduction method of electronic system, electronic system and voltage conversion circuit |
| WO2016095683A1 (en) * | 2014-12-15 | 2016-06-23 | 华为技术有限公司 | Method and device for eliminating tdd noise |
| WO2016115744A1 (en) * | 2015-01-24 | 2016-07-28 | 深圳市鑫龙上通讯科技有限公司 | Tdd interference-resisting mobile communications device |
| CN106487520A (en) * | 2016-11-17 | 2017-03-08 | 延锋伟世通电子科技（上海）有限公司 | A kind of vehicle-mounted ethernet circuit plate |
| CN106375525A (en) * | 2016-11-30 | 2017-02-01 | 深圳天珑无线科技有限公司 | Anti-jamming circuit |
| CN108234727A (en) * | 2017-11-29 | 2018-06-29 | 维沃移动通信有限公司 | A kind of noise-reduction method and mobile terminal |
| CN108234727B (en) * | 2017-11-29 | 2020-04-10 | 维沃移动通信有限公司 | Noise reduction method, mobile terminal and computer readable storage medium |
| CN109711084A (en) * | 2019-01-09 | 2019-05-03 | 郑州云海信息技术有限公司 | The inspection method and relevant apparatus of Tandem devices in a kind of PCB |
| CN109711084B (en) * | 2019-01-09 | 2022-02-18 | 郑州云海信息技术有限公司 | Method and related device for checking serial devices in PCB |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Changan Town, Guangdong province 523860 usha Beach Road Dongguan City, No. 18 Guangdong Oupo Mobile Communication Co Ltd Patentee after: OPPO Guangdong Mobile Communications Co., Ltd. Address before: Changan Town, Guangdong province 523860 usha Beach Road Dongguan City, No. 18 Guangdong Oupo Mobile Communication Co Ltd Patentee before: Guangdong Opel Mobile Communications Co., Ltd. |
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| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Patentee after: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., Ltd. Address before: Changan Town, Guangdong province 523860 usha Beach Road Dongguan City, No. 18 Guangdong Oupo Mobile Communication Co Ltd Patentee before: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110629 |