WO2021228188A1 - 数据传输电缆及相关设备 - Google Patents
数据传输电缆及相关设备 Download PDFInfo
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- WO2021228188A1 WO2021228188A1 PCT/CN2021/093549 CN2021093549W WO2021228188A1 WO 2021228188 A1 WO2021228188 A1 WO 2021228188A1 CN 2021093549 W CN2021093549 W CN 2021093549W WO 2021228188 A1 WO2021228188 A1 WO 2021228188A1
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- WIPO (PCT)
- Prior art keywords
- transmission cable
- signal
- data transmission
- wire
- control signal
- Prior art date
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/02—Cables with twisted pairs or quads
- H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
- H01B11/08—Screens specially adapted for reducing cross-talk
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/02—Cables with twisted pairs or quads
- H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
- H01B11/10—Screens specially adapted for reducing interference from external sources
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/02—Cables with twisted pairs or quads
- H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
- H01B11/10—Screens specially adapted for reducing interference from external sources
- H01B11/1091—Screens specially adapted for reducing interference from external sources with screen grounding means, e.g. drain wires
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/32—Filling or coating with impervious material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/0054—Cables with incorporated electric resistances
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/65—Control of camera operation in relation to power supply
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/66—Remote control of cameras or camera parts, e.g. by remote control devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/665—Control of cameras or camera modules involving internal camera communication with the image sensor, e.g. synchronising or multiplexing SSIS control signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/10—Adaptations for transmission by electrical cable
- H04N7/108—Adaptations for transmission by electrical cable the cable being constituted by a pair of wires
Definitions
- This application relates to the field of electronic technology, in particular to a data transmission cable and related equipment.
- MIPI bus is a data transmission interface technology used for communication between chips.
- MIPI bus is used in the terminal field (including communication between chips such as camera, display, storage, etc.) It is becoming more and more widespread.
- MIPI C-PHY is a serial interface technology based on three-wire three-level encoding and an embedded clock mechanism. The current C-PHY interface rate reaches 10.26Gbps.
- MIPI bus technology will be widely used in terminal equipment chips for a long time in the future by virtue of the complete ecological industry chain, high bandwidth, low power consumption and other excellent technical characteristics, and will become Sony Sony, Samsung Samsung, Qualcomm Qualcomm, etc. The mainstream standard interface of chip manufacturers.
- High-speed MIPI signals have strict requirements on link loss and electromagnetic interference. If excessive loss and excessive interference occur during transmission, the signal transmission quality and transmission distance will be affected, and signal decoding will fail. As the MIPI C-PHY signal rate increases from 7.98Gbps to 10.26Gbps, the MIPI bus of the same length is greatly affected by link loss and signal interference. A technology is needed to solve the problem of poor MIPI bus transmission quality, short transmission distance, and Other signal lines interfere with each other.
- the embodiments of the present application provide a data transmission cable and related equipment, which are used to solve the problems of poor MIPI bus transmission quality, short transmission distance, and mutual interference with other signal lines.
- an embodiment of the present application provides a data transmission cable, and the data transmission cable includes:
- a signal wire harness includes at least three signal wires, the at least three signal wires are arranged at intervals and form a differential pair signal wire in pairs, and the differential pair signal wire is used to transmit a differential data signal;
- a ground wire is arranged to surround and wrap the signal wiring harness, and the ground wire is used to transmit ground signals and isolate the signal wiring harness from the signal wiring harness of other data transmission cables;
- the filling medium is provided in a space inside the ground wire except for the signal wire.
- the cross section of the ground wire is circular, and the cross section of the at least three signal wires is circular.
- the at least three signal lines are arranged in parallel.
- the impedance of each signal line is greater than or equal to 45 ohms and less than or equal to 55 ohms.
- the at least three signal lines are three signal lines, and the three signal lines are arranged in a rotationally symmetrical distribution on the inner side of the ground line.
- the filling medium is a flexible material, and the flexible material is preferably polyethylene.
- the data transmission cable further includes: a first protective layer, and the first protective layer covers the ground wire arrangement.
- the first protective layer is made of insulating plastic material.
- an embodiment of the present application provides an electronic device.
- the electronic device includes a camera module, a device motherboard, and a transmission cable.
- the device motherboard includes an image processor, and the transmission cable includes a second protective layer and at least Two data transmission cables according to the first aspect, the second protective layer covers the data transmission cable arrangement;
- the camera module transmits image data to the image processor through the at least two data transmission cables as described in the first aspect.
- the transmission cable further includes a working voltage transmission cable and a control signal transmission cable, the working voltage transmission cable and the control signal transmission cable are arranged in the second protective layer, wherein:
- the device main board provides the operating voltage for the camera module through the operating voltage transmission cable
- the device main board also transmits a control signal to the camera module through a control signal transmission cable.
- the working voltage includes at least one of the following: analog voltage AVDD, digital voltage DVDD, voice coil motor voltage VCM_VDD, driver chip voltage DRV_VDD, and interface circuit voltage DOVDD.
- control signal includes at least one of the following: a reset signal RST, a clock signal CLK, and a two-wire serial bus I2C.
- the cross section of the transmission cable is rectangular or circular.
- the working voltage transmission cable and the control signal transmission cable are jointly arranged on one side of the data transmission cable, and the working voltage transmission cable and the control signal transmission cable are arranged side by side.
- the working voltage transmission cable and the control signal transmission cable are separately arranged on both sides of the connection of the at least two data transmission cables.
- the data transmission cable includes a signal wire harness, a ground wire, and a filling medium.
- Group differential data signals to achieve long-distance MIPI C-PHY data signal transmission and improve signal transmission quality; the ground wire surrounds and wraps the signal wiring harness.
- the signal wiring harness can also be connected to other
- the signal harness isolation of the data transmission cable reduces the interference between the external signal line and the internal signal line of the data transmission cable; the filling medium is set in the space inside the ground line except for the signal line, reducing the data transmission cable Interference between internal signal lines.
- Figure 1 is a schematic diagram of an electronic system using MIPI bus to transmit data provided by the prior art
- Fig. 2 is a schematic structural diagram of a MIPI C-PHY transmission line provided by the prior art
- FIG. 3 is a schematic diagram of a cable structure for transmitting a pair of high-speed differential signals provided by the prior art
- Figure 4(a) is a schematic structural diagram of a data transmission cable provided by an embodiment of the present application.
- Fig. 4(b) and Fig. 4(c) are respectively structural schematic diagrams of a longitudinal section and a cross section of a data transmission cable provided by an embodiment of the present application;
- FIG. 4(d) is a comparison diagram of the transmission line insertion loss of the data transmission cable provided by the embodiment of the present application and the data transmission cable provided by the prior art;
- Figure 5 (a) is a schematic structural diagram of an electronic device provided by an embodiment of the present application.
- Figure 5(b) is a schematic cross-sectional view of a transmission cable provided by an embodiment of the present application.
- Figure 5(c) is a schematic cross-sectional view of another transmission cable provided by an embodiment of the present application.
- FIG. 1 is a schematic diagram of an electronic system using MIPI bus to transmit data provided by the prior art
- FIG. 2 is a schematic diagram of a MIPI C-PHY transmission line provided by the prior art.
- the electronic system integrates a camera module, a display module and a processor. Due to the limited volume of the electronic system, the distance between the camera module, the display module and the processor is relatively short (generally in Within 30cm), the PCB trace structure shown in Figure 2 is usually used to transmit MIPI signals between the camera module, display module and processor, and three traces (ie A, B, C) are used for transmission. MIPI C-PHY signal, this scheme puts forward strict requirements on link loss and interference between PCB traces.
- MIPI signals are affected by PCB wiring loss, and the transmission distance is generally within 30cm, which cannot meet long-distance application scenarios such as smart screens, vehicles, and security.
- MIPI high-speed signals are sensitive to PCB trace loss, which leads to poor signal transmission quality (such as streaks in photos).
- the electromagnetic interference generated by it is large, and it is also susceptible to interference from other signals, which affects the stability of the equipment (such as display screens).
- Fig. 3 is a schematic diagram of a cable structure for transmitting a pair of high-speed differential signals provided by the prior art, in which signal lines P and N form a pair of differential signals, and GND is a ground signal.
- the cable is processed with a shielded bag, so that the differential signal can ensure the transmission quality during long-distance transmission, and the transmission distance can exceed 1 meter.
- the embodiment of the present application provides a data transmission cable and related equipment. Refer to the following device-side embodiment.
- Figure 4 (a) is a schematic diagram of the structure of a data transmission cable provided by an embodiment of the present application
- Figure 4 (b) and Figure 4 (c) are structural schematic diagrams of a longitudinal section and a cross section of a data transmission cable provided by an embodiment of the present application, respectively, and the data transmission cable 100 includes:
- a signal wiring harness 110 the signal wiring harness includes at least three signal wires, the at least three signal wires are arranged at intervals and two by two form a differential pair signal wire, and the differential pair signal wire is used to transmit a differential data signal;
- the ground wire 120 is arranged to surround and wrap the signal wiring harness 110, and the ground wire 120 is used to transmit ground signals and to connect the signal wiring harness 110 with the signals of the other data transmission cables 100
- the wiring harness 110 is isolated;
- the filling medium 130 is provided in a space inside the ground line 120 except for the signal line.
- the data transmission cable includes a signal wire harness, a ground wire, and a filling medium.
- Group differential data signals to achieve long-distance MIPI C-PHY data signal transmission and improve signal transmission quality; the ground wire surrounds and wraps the signal wiring harness.
- the signal wiring harness can also be connected to other
- the signal harness isolation of the data transmission cable reduces the interference between the external signal line and the internal signal line of the data transmission cable; the filling medium is set in the space inside the ground line except for the signal line, reducing the data transmission cable Interference between internal signal lines.
- the cross section of the ground wire 120 is circular, and the cross section of the at least three signal wires is circular.
- the cross-sections of the at least three signal lines may also be square, rectangular, arc-shaped, or other shapes, which are not limited herein.
- the at least three signal lines may be arranged in parallel.
- the at least three signal wires may also be spirally wound around the same axis.
- the distance between at least three signal lines may be equal or unequal, which is not limited here.
- the axis can be the axis where the center of the circle is located, or the axis where any point in the circle is located, which is not limited here.
- the impedance of each signal line is greater than or equal to 45 ohms and less than or equal to 55 ohms.
- the at least three signal lines are three signal lines, and the three signal lines are arranged in a rotationally symmetrical distribution on the inner side of the ground line.
- the rotational symmetry angle is 120°; if there are four signal lines, the rotational symmetry angle is 90°; if there are five signal lines, the rotational symmetry angle is 72°; And so on, no more examples.
- the filling medium 130 is a flexible material, and the flexible material is preferably polyethylene.
- the data transmission cable 100 further includes a first protective layer 140, and the first protective layer covers the ground wire 120.
- the first protective layer 140 is made of an insulating plastic material.
- FIG. 4(d) is a comparison diagram of the transmission line insertion loss of the data transmission cable provided by the embodiment of the present application and the data transmission cable provided by the prior art.
- the data transmission cable provided in the embodiment of the present application and the data transmission cable provided in the prior art are both 1.2 m. It can be seen from FIG. 4(d) that, in the case of using the same transmission medium, the transmission line insertion loss of the data transmission cable provided in the embodiment of the application is lower than that of the data transmission cable provided in the prior art.
- the transmission line insertion loss of the data transmission cable provided in the embodiment of the present application is reduced by 8.559 dB. Therefore, the data transmission cable provided in the embodiment of the present application can improve the transmission quality of the MIPI signal and increase the transmission distance of the MIPI signal.
- Figure 5 (a) is a schematic structural diagram of an electronic device provided by an embodiment of the present application, applied to mobile terminals, smart screens, vehicle terminals, security terminals, etc.
- the electronic device 200 includes a camera
- the device main board 220 includes an image processor 221.
- the transmission cable 230 includes a second protective layer 231 and at least two data transmission cables 100 as described above.
- the second protective layer 231 covers the arrangement of the data transmission cable 100;
- the camera module 210 transmits image data to the image processor 221 through the at least two data transmission cables 100 as described above.
- multiple sets of different types of signals can be transmitted between the camera module and the device mainboard, and the interference between different signal lines is reduced through shielding protection, and the link loss is reduced through the impedance matching of the transmission line, thereby Realize long-distance transmission of high-speed signals.
- the transmission cable 230 further includes a working voltage transmission cable 232 and a control signal transmission cable 233.
- the working voltage transmission cable 232 and the control signal transmission cable 233 are arranged in the second protective layer 231, in:
- the device main board 220 provides a working voltage for the camera module 210 through the working voltage transmission cable 232;
- the device mainboard 220 also transmits control signals to the camera module 210 through the control signal transmission cable 233.
- the working voltage includes at least one of the following: analog voltage AVDD, digital voltage DVDD, voice coil motor voltage VCM_VDD, driver chip voltage DRV_VDD, and interface circuit voltage DOVDD.
- AVDD is the analog voltage required by the camera module
- DVDD is the digital voltage required by the image sensor
- VCM_VDD is the voltage required by the voice coil motor
- DRV_VDD is the voltage required by the driver chip
- DOVDD is the data input and output. The digital voltage required for the operation of the module.
- control signal includes at least one of the following: a reset signal RST, a clock signal CLK, and a two-wire serial bus (Inter-Integrated Circuit, I2C).
- RST is the abbreviation of RESET.
- RESET is generally used in the circuit of a high-speed CPU, which means reset and initialization.
- the RESET signal should be used to initialize the circuit when the circuit is turned on, and RESET should also be used when the circuit is abnormally crashed. The signal makes it restart.
- CLK is the abbreviation of CLOCK
- CLOCK is the shift pulse provided to the shift register, each pulse will cause the data to move in or out of one bit.
- the data on the data port must be coordinated with the clock signal to transmit data normally, and the frequency of the data signal must be 1/2 times the frequency of the clock signal.
- I2C is a simple, two-way two-wire synchronous serial bus developed by Philips. It only needs two wires to transfer information between devices connected to the bus. I2C includes serial data (SDA) and serial clock (SCL).
- SDA serial data
- SCL serial clock
- the cross section of the transmission cable 230 is rectangular or circular.
- the working voltage transmission cable 232 and the control signal transmission cable 233 are jointly arranged on one side of the data transmission cable 100, and the working voltage transmission cable 232 and the control signal transmission cable 233 are arranged side by side .
- FIG. 5(b) is a schematic cross-sectional view of a transmission cable provided by an embodiment of the present application.
- the working voltage transmission cable and the control signal transmission cable are co-located on one side of the data transmission cable, and the working voltage transmission cable and the control signal transmission cable are arranged side by side.
- the working voltage transmission cables AVDD, DVDD, VCM_VDD, DRV_VDD, DOVDD, and control signal transmission cables RST, CLK, SCL, SDL form a rectangular array arranged side by side.
- the working voltage transmission cable 232 and the control signal transmission cable 233 are separately arranged on both sides of the connection of the at least two data transmission cables 100.
- FIG. 5(c) is a schematic cross-sectional view of another transmission cable provided by an embodiment of the present application.
- the working voltage transmission cable and the control signal transmission cable are separately arranged on both sides of the connection of the two data transmission cables.
- the two data transmission cables are arranged opposite to each other.
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Abstract
Description
图4(d)是本申请实施例提供的数据传输线缆与现有技术提供的数据传输线缆的传输线插入损耗对比图;
Claims (15)
- 一种数据传输线缆,其特征在于,所述数据传输线缆包括:信号线束,所述信号线束包括至少三个信号线,所述至少三个信号线间隔设置并两两构成差分对信号线,所述差分对信号线用于传输差分数据信号;地线,所述地线环绕并包覆所述信号线束设置,所述地线用于传输地信号以及将所述信号线束与其他所述数据传输线缆的所述信号线束隔离;填充介质,所述填充介质设于所述地线内侧除所述信号线之外的空间。
- 根据权利要求1所述的数据传输线缆,其特征在于,所述地线的横截面为圆环形,所述至少三个信号线的横截面为圆形。
- 根据权利要求1或2所述的数据传输线缆,其特征在于,所述至少三个信号线平行设置。
- 根据权利要求1-3任一项所述的数据传输线缆,其特征在于,每个信号线的阻抗大于或等于45欧姆,且小于或等于55欧姆。
- 根据权利要求1-4任一项所述的数据传输线缆,其特征在于,所述至少三个信号线为三个信号线,三个所述信号线呈旋转对称分布设于所述地线内侧。
- 根据权利要求1-5任一项所述的数据传输线缆,其特征在于,所述填充介质为柔性材料,所述柔性材料优选为聚乙烯。
- 根据权利要求1-6所述的数据传输线缆,其特征在于,所述数据传输线缆还包括:第一保护层,所述第一保护层包覆所述地线设置。
- 根据权利要求7所述的数据传输线缆,其特征在于,所述第一保护层为绝缘塑胶材料。
- 一种电子设备,其特征在于,所述电子设备包括摄像模块、设备主板和传输线缆,所述设备主板包括图像处理器,所述传输线缆包括第二保护层和至少两个如权利要求1-8任一项所述的数据传输线缆,所述第二保护层包覆所述数据传输线缆设置;所述摄像模块通过所述至少两个如权利要求1-8任一项所述的数据传输线缆为所述图像处理器传输图像数据。
- 根据权利要求9所述的电子设备,其特征在于,所述传输线缆还包括工作电压传输电缆、控制信号传输电缆,所述工作电压传输电缆和所述控制信号传输电缆设于所述第二保护层内,其中:所述设备主板通过所述工作电压传输电缆为所述摄像模块提供工作电压;所述设备主板还通过所述控制信号传输电缆向所述摄像模块传输控制信号。
- 根据权利要求10所述的电子设备,其特征在于,所述工作电压包括以下至少一种:模拟电压AVDD、数字电压DVDD、音圈马达电压VCM_VDD、驱动芯片电压DRV_VDD、接口电路电压DOVDD。
- 根据权利要求10所述的电子设备,其特征在于,所述控制信号包括以下至少一种:复位信号RST、时钟信号CLK、两线式串行总线I2C。
- 根据权利要求9-12所述的电子设备,其特征在于,所述传输线缆的横截面为矩形或圆形。
- 根据权利要求9-13任一项所述的电子设备,其特征在于,所述工作电压传输电缆与所述控制信号传输电缆共同设于所述数据传输电缆的一侧,且所述工作电压传输电缆与所述控制信号传输电缆并排设置。
- 根据权利要求9-13任一项所述的电子设备,其特征在于,所述工作电压传输电缆与所述控制信号传输电缆分设于所述至少两个数据传输线缆的连线的两侧。
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KR1020227043311A KR20230009956A (ko) | 2020-05-14 | 2021-05-13 | 데이터 송신 케이블 및 관련 디바이스 |
JP2022568962A JP2023527710A (ja) | 2020-05-14 | 2021-05-13 | データ伝送ケーブル及び関連するデバイス |
US17/985,333 US20230076232A1 (en) | 2020-05-14 | 2022-11-11 | Data transmission cable and related device |
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CN202010409589.6A CN113674916B (zh) | 2020-05-14 | 2020-05-14 | 数据传输电缆及相关设备 |
CN202010409589.6 | 2020-05-14 |
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US17/985,333 Continuation US20230076232A1 (en) | 2020-05-14 | 2022-11-11 | Data transmission cable and related device |
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JP (1) | JP2023527710A (zh) |
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CN113674916B (zh) | 2023-04-28 |
CN113674916A (zh) | 2021-11-19 |
KR20230009956A (ko) | 2023-01-17 |
US20230076232A1 (en) | 2023-03-09 |
JP2023527710A (ja) | 2023-06-30 |
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