WO2017096806A1 - 抑制电磁干扰的方法以及装置 - Google Patents

抑制电磁干扰的方法以及装置 Download PDF

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Publication number
WO2017096806A1
WO2017096806A1 PCT/CN2016/088522 CN2016088522W WO2017096806A1 WO 2017096806 A1 WO2017096806 A1 WO 2017096806A1 CN 2016088522 W CN2016088522 W CN 2016088522W WO 2017096806 A1 WO2017096806 A1 WO 2017096806A1
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signal
common mode
driving
terminal
coupling
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PCT/CN2016/088522
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English (en)
French (fr)
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侯晓明
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乐视控股（北京）有限公司
乐视致新电子科技（天津）有限公司
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Priority to US15/250,529 priority Critical patent/US20170163571A1/en
Publication of WO2017096806A1 publication Critical patent/WO2017096806A1/zh

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components

Definitions

  • the embodiments of the present application relate to the field of electrical data processing technologies, and in particular, to a method and an apparatus for suppressing electromagnetic interference.
  • Network transformers (simply, referred to as data mercury) are devices found on consumer PCI network cards and can also be referred to as network isolation transformers. Compared with ordinary transformers, network transformers use different magnetic materials because of the different frequencies used. Ordinary transformers are mainly used for energy transmission, and network transformers are usually used for signal transmission.
  • the differential signal sent from the physical layer (PHY) is coupled and coupled by a coil to enhance the signal, and is coupled to different levels of connection through conversion.
  • the other end of the network cable; the other is the different levels between different network devices connected by the isolated network cable to prevent different voltages from transmitting damaged devices through the network cable.
  • the network transformer mainly includes a coupling transformer and a common mode filter.
  • the coupling transformer is located at the IC end, and the common mode filter is located at the network port end.
  • the signal from the IC terminal is first processed by the coupling transformer to enhance the signal; and then the interference is performed by the common mode filter. Filtering of the signal.
  • the inventor found that since the interference signal is generated by the IC terminal, it cannot be eliminated by the coupling transformer, and the driving capability of the interference signal becomes stronger after passing through the coupling transformer, thereby substantially increasing the interference.
  • the common mode filter it is difficult or impossible to eliminate the interference, which leads to the phenomenon that electromagnetic interference (EMI) is often exceeded.
  • EMI electromagnetic interference
  • One of the objectives of the embodiments of the present application is to provide a method and a device for suppressing electromagnetic interference, which are used to solve the problem that the network transformer in the prior art is difficult or impossible to eliminate interference signals, thereby achieving the purpose of suppressing or reducing EMI.
  • Embodiments of the present application provide a method for suppressing electromagnetic interference, including:
  • the signal after the common mode suppression processing is coupled to obtain at least a signal with enhanced driving capability and sent to the network port end.
  • the receiving a signal from the IC end and performing common mode suppression processing on the received signal may include: receiving a signal from the IC end with a common mode filter and co-sending the received signal.
  • the mode suppression process is to at least cancel or attenuate the interference signal doped in the received signal.
  • the method for suppressing electromagnetic interference may further include: the common mode filter has a middle tap, and the middle tap of the common mode filter is connected to the power source according to the driving type of the IC end chip or Ground.
  • the connecting the intermediate tap of the common mode filter to the power source or the ground may include: if the driving type of the IC end chip is voltage driving, connecting the center tap of the common mode filter to Power supply; if the drive type of the IC side chip is current drive, connect the center tap of the common mode filter to ground.
  • the coupling processing the signal after the common mode suppression processing may include: coupling the signal after the common mode suppression processing by using a coupling transformer to obtain at least a signal with enhanced driving capability. And sent to the network port.
  • the method for suppressing electromagnetic interference may further include: the coupling transformer has a middle tap, and the intermediate tap of the coupling transformer is connected to a power source or a ground according to a driving type of the IC end chip.
  • connecting the intermediate tap of the coupling transformer to the power source or the ground according to the driving type of the IC terminal chip may include: if the driving type of the IC terminal chip is voltage driving, coupling the transformer The center tap is connected to the power supply; if the IC end chip is driven by current, connect the center tap of the coupling transformer to ground.
  • connecting the intermediate tap of the coupling transformer to the power source may include: according to the driving voltage required for driving the IC terminal chip, The center tap of the coupling transformer is connected to a power supply with a matching level.
  • the embodiment of the present application further provides an apparatus for suppressing electromagnetic interference, including:
  • a first circuit configured to receive a signal from the IC terminal and perform a common mode rejection process on the received signal to at least cancel or attenuate the interference signal doped in the received signal;
  • the second circuit is configured to perform a coupling process on the signal after the common mode suppression process to obtain at least a signal with enhanced driving capability, and send the signal to the network port end.
  • the first circuit may include a common mode filter
  • the second circuit may include a coupling transformer
  • the technical solution of the embodiment of the present application has the following advantages: since the signal from the IC terminal is first received and the received signal is subjected to common mode suppression processing to at least partially eliminate or weaken the interference signal; and then the signal after the common mode suppression processing is performed.
  • the coupling process obtains at least a signal with enhanced driving capability and sends it to the network port end, avoiding the use of the prior art scheme to amplify the interference signal, and it is difficult or impossible to eliminate the interference, eliminating or suppressing the electromagnetic interference, effectively solving such as The problem of electromagnetic interference (Electromagnetic Interference referred to as EMI) is exceeded.
  • EMI Electromagnetic Interference
  • FIG. 1 is a schematic flow chart of a method for suppressing electromagnetic interference according to Embodiment 1 of the present application;
  • FIG. 2 is a schematic flow chart of a method for suppressing electromagnetic interference according to Embodiment 2 of the present application;
  • FIG. 3 is a schematic flow chart of a method for suppressing electromagnetic interference according to Embodiment 3 of the present application.
  • FIG. 4 is a schematic structural diagram of an apparatus for suppressing electromagnetic interference according to Embodiment 4 of the present application.
  • FIG. 5 is a schematic structural diagram of an apparatus for suppressing electromagnetic interference according to Embodiment 5 of the present application.
  • FIG. 6 is a schematic structural diagram of an apparatus for suppressing electromagnetic interference according to Embodiment 6 of the present application.
  • FIG. 1 is a schematic flowchart of a method for suppressing electromagnetic interference according to Embodiment 1 of the present application; as shown in FIG. 1 , the method may include at least the following steps:
  • S101 Receive a signal from the IC end and perform common mode suppression processing on the received signal, and so on. Less eliminating or attenuating the interference signal doped in the received signal;
  • the signal from the IC terminal can be, but is not limited to, including a differential signal.
  • the differential signal can be decomposed into a common mode signal and a differential mode signal.
  • a common-mode signal is the same signal that is applied to the two inputs of a differential amplifier or instrumentation amplifier, usually due to line conduction and spatial magnetic field interference, and is an unwanted signal.
  • a specific common mode filter may be used, and the common mode filter may include at least a common mode inductor.
  • the common mode filter may include at least a common mode inductor.
  • the interference signal generated by the line conduction and the spatial magnetic field interference is removed or suppressed in the signal after the common mode suppression processing.
  • the signal after the common mode suppression processing is coupled, it is avoided as much as possible. As little interference signal as possible is amplified.
  • a specific coupling transformer may be used to perform signal amplification.
  • the specific coupling transformer may include at least a differential mode coupling coil.
  • the specific type of coupling transformer can be flexibly selected according to the requirements of use, such as fully coupled transformer or loosely coupled transformer.
  • FIG. 2 is a schematic flowchart of a method for suppressing electromagnetic interference according to Embodiment 2 of the present application; as shown in FIG. 2, the method may include at least the following steps:
  • S201 Receive a signal from the IC terminal with a common mode filter and perform common mode suppression processing on the received signal to at least eliminate or attenuate the interference signal doped in the received signal.
  • the common mode filter includes a common mode inductor, and the common mode inductor is essentially a bidirectional filter: on the one hand, it is necessary to filter out common mode electromagnetic interference on the signal line, and on the other hand, it is necessary to suppress itself from emitting electromagnetic interference to avoid affecting the same The normal operation of other electronic equipment in the electromagnetic environment.
  • the common mode inductor consists of two common mode inductors wound around the same core with the same number of turns and phase (wound reverse).
  • the current when a normal current in the circuit flows through the common mode inductor, the current generates a reverse magnetic field in the inductive coil wound in the same phase and cancels each other.
  • the normal signal current is mainly affected by the coil resistance (and a small amount of leakage). Damping caused by the sense); when a common mode current flows through the coil, due to the same direction of the common mode current, a magnetic field in the same direction is generated in the coil to increase the inductive reactance of the coil, so that The coil exhibits high impedance and produces a strong damping effect, thereby attenuating the common mode current for filtering purposes.
  • the wires wound on the coil core should be insulated from each other to ensure that there is no breakdown short circuit between the turns of the coil under the action of instantaneous overvoltage.
  • the core in the coil should be insulated from the coil to prevent breakdown between the two under transient overvoltage.
  • the coil should be wound as much as possible, which can reduce the parasitic capacitance of the coil and enhance the ability of the coil to instantaneous overvoltage.
  • two-wire common-mode inductors can be used with autotransformers.
  • Three-wire common-mode inductors can also be used, requiring only two cores to reduce cost.
  • the above common mode filter may be a five-terminal device having two input terminals, two output terminals and a ground terminal, and the outer casing should be connected to the ground when in use.
  • the circuit specifically includes a common mode inductor (also known as a common mode choke) L and filter capacitors C1 to C4. L has no effect on series mode interference, but when common mode interference occurs, since the magnetic flux directions of the two coils are the same, the total inductance increases rapidly after coupling, so that the common mode signal exhibits a large inductive reactance. It is not easy to pass, so it is called common mode choke or common mode inductor.
  • a small common mode inductor based on high frequency interference suppression countermeasures can be adopted, the signal of the common mode inductor is not attenuated, the volume is small, the use is convenient, the balance is good, the use is convenient, and the quality is high.
  • Etc. It is also possible to use a ferrite with a magnetic core and a two-wire winding, which can simultaneously suppress high common mode interference and low differential mode interference signals, and low differential mode interference signals suppress interference sources, which are difficult to deform in high speed signals, small in size, and Good balance, easy to use, high quality and so on.
  • the common mode filter composed of the common mode inductor receives the signal from the IC terminal and performs the common mode suppression processing on the received signal, and the method further includes: the common mode inductor has a middle tap, according to the IC
  • the driver type of the terminal chip connects the center tap of the common mode inductor to the power supply or ground.
  • the connecting the intermediate tap of the common mode inductor to the power source or the ground includes: if the driving type of the IC terminal chip is voltage driving, connecting the intermediate tap of the common mode inductor to the power source; if the driving type of the IC terminal chip is current Drive, connect the center tap of the common mode inductor to ground through a capacitor.
  • the common mode interference signal processed by the common mode filter removes or suppresses the common mode interference signal generated by the line conduction and the spatial magnetic field interference, and when the differential signal after the common mode suppression processing is coupled, As far as possible, as much as possible, the common mode interference signal is prevented from being amplified.
  • a specific coupling transformer may be used to perform signal amplification.
  • the specific coupling transformer may include at least a differential mode coupling coil.
  • the specific type of coupling transformer can be flexibly selected according to the requirements of use, such as fully coupled transformer or loosely coupled transformer.
  • the coupling transformer has the function of protecting the internal circuit and the technical function of isolating the high-current DC signal. The inventors of the present invention can realize the present invention without any creative work, and will not be described herein.
  • FIG. 3 is a schematic flowchart of a method for suppressing electromagnetic interference according to Embodiment 3 of the present application; as shown in FIG. 3, the method may include at least the following steps:
  • S301 Receive a signal from an IC end and perform a common mode suppression process on the received signal to at least eliminate or attenuate the interference signal doped in the received signal;
  • S302 Coupling the signal after the common mode suppression processing by using a coupling transformer to obtain at least a signal with enhanced driving capability, and transmitting the signal to the network port end.
  • the step S302 may include: the coupling transformer has a middle tap, and the intermediate tap of the coupling transformer is connected to the power source or the ground according to the driving type of the IC end chip.
  • connecting the center tap of the coupling transformer to the power source or the ground includes: if the driving type of the IC terminal chip is voltage driving, connecting the center tap of the coupling transformer to the power source, specifically, through a The pull-up resistor is connected to the power supply; if the driving type of the IC terminal chip is current driving, the intermediate tap of the coupling transformer is connected to the ground, and specifically, it can be connected to the ground through a capacitor.
  • the driving type of the IC terminal chip is voltage driving
  • the intermediate tap of the coupling transformer when the intermediate tap of the coupling transformer is connected to the power source, the intermediate tap of the coupling transformer can be connected according to the driving voltage required for driving the IC terminal chip to have Match level power supply.
  • the voltage value of the power supply is determined by the chip, and can be 3.3V, 2.5V, 1.8V, and the like.
  • the coupling transformer performs the coupling processing, and the related art may refer to the related description, and details are not described herein again.
  • FIG. 4 is a schematic structural diagram of an apparatus for suppressing electromagnetic interference according to Embodiment 4 of the present application; as shown in FIG. 4, it may at least include the following hardware modules: a first circuit 401 and a second circuit electrically connected to each other and capable of data communication; 402. specific:
  • the first circuit 401 is configured to receive a signal from the IC terminal and perform a common mode rejection process on the received signal to at least cancel or attenuate the interference signal doped in the received signal;
  • the second circuit 402 is configured to perform a coupling process on the signal after the common mode suppression process to obtain at least a signal with enhanced driving capability and send it to the network port end.
  • FIG. 5 is a schematic structural diagram of an apparatus for suppressing electromagnetic interference according to Embodiment 5 of the present application; as shown in FIG. 5, it may at least include the following hardware modules: a common mode filter 501 electrically connected to each other and capable of data communication, and a coupling transformer 502, the common mode inductor 501 is configured to receive a signal from the IC terminal and perform common mode suppression processing on the received signal to at least eliminate or attenuate the interference signal doped in the received signal; the coupling transformer 502 is set to be common mode The processed signal is subjected to coupling processing to obtain at least a signal with enhanced driving capability and transmitted to the network port end.
  • a common mode filter 501 electrically connected to each other and capable of data communication
  • a coupling transformer 502 the common mode inductor 501 is configured to receive a signal from the IC terminal and perform common mode suppression processing on the received signal to at least eliminate or attenuate the interference signal doped in the received signal
  • the coupling transformer 502 is set to be common mode
  • the peripheral circuits such as the Bob Smith circuit, may also be configured for the apparatus of the above-described embodiments of Figures 4 and 5, as required by some of the necessary scenarios, such as when a two-wire common mode inductor is used and the drive type of the IC is current driven.
  • This circuit has two functions: it provides impedance matching between any two groups of differential signals on the network port; it can provide a return path to the common mode signal.
  • FIG. 6 is a schematic structural diagram of an apparatus for suppressing electromagnetic interference according to Embodiment 6 of the present application; as shown in FIG. 6, at least the following hardware modules may be included: a common mode filter 601 electrically connected to each other and capable of data communication, and a coupling transformer 602, the technical role of each module is not described here, and it is instructed by the above-mentioned embodiments of the present application or inspired by the prior art, and will not be further described herein.
  • the most original differential signal from the IC side is the personal identification code (PIN) of the common mode filter 9/11/14/16 4
  • PIN personal identification code
  • the PIN pin input is output from the PIN1 ⁇ 3 ⁇ 6 ⁇ 8 PIN pins of the coupling transformer 602 through the common mode inductor 601 and the coupling transformer 602 flowing through the common mode filter, and is output to the network port end.
  • PIN 9/11/14/16 is the input end of the signal
  • PIN1 ⁇ 3 ⁇ 6 ⁇ 8 is the output end of the signal
  • PIN10 ⁇ 15 ⁇ 2 ⁇ 7 is the middle tap, which can be grounded or connected to the power supply.
  • the chip at the IC side includes, but is not limited to, a PHY chip.
  • the device embodiments described above are merely illustrative, wherein the modules described as separate components may or may not be physically separate, and the components displayed as modules may or may not be physical modules, ie may be located A place, or it can be distributed to multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment. Those of ordinary skill in the art can understand and implement without deliberate labor.

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Abstract

一种抑制电磁干扰的方法以及装置，抑制电磁干扰的方法包括：接收来自IC端的信号并对接收到的信号进行共模抑制处理，以至少消除或者减弱掺杂在接收到的信号中的干扰信号（S101）；对共模抑制处理后的信号进行耦合处理，以至少获得驱动能力增强的信号，并发送给网口端（S102）。由于首先接收来自IC端的信号并对接收到的信号进行共模抑制处理从而至少预先消除或者减弱了干扰信号；之后再对共模抑制处理后的信号进行耦合处理获得了至少驱动能力增强的信号，并发送给网口端，避免了采用现有技术的方案使得干扰信号放大、很难或者根本无法消除干扰，从而消除或抑制了电磁干扰，有效解决了诸如电磁干扰超标等问题。

Description

抑制电磁干扰的方法以及装置
本申请要求于2015年12月8日提交中国专利局、申请号为2015108976401，发明名称为“抑制电磁干扰的方法以及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及电数据处理技术领域，尤其涉及一种抑制电磁干扰的方法以及装置。
背景技术
网络变压器(简单说，可称之为数据汞)是消费级PCI网卡上都具备的设备，也可称为网络隔离变压器。与普通变压器相比，网络变压器由于使用的频率不同，采用了不同的导磁材料。普通变压器主要用来做能量传输，而网络变压器通常是用来作为信号传输。
具体的，网路变压器作用主要有两个，一是传输数据，它把物理层(Physical Layer，PHY)送出来的差分信号用线圈耦合滤波以增强信号，并且通过转换耦合到不同电平的连接网线的另外一端；一是隔离网线连接的不同网络设备间的不同电平，以防止不同电压通过网线传输损坏设备。
网络变压器主要包括耦合变压器以及共模滤波器，耦合变压器位于IC端，而共模滤波器位于网口端，来自IC端的信号，首先经过耦合变压器处理以增强信号；再通过共模滤波器进行干扰信号的滤除。但是，发明人在实现本申请的过程中，发现由于干扰信号是IC端产生，经过耦合变压器无法消除，而且该干扰信号经过耦合变压器后驱动能力变强，实质上加大了干扰，此时再经过共模滤波器，很难或者根本无法消除干扰，进而导致电磁干扰(Electromagnetic Interference简称EMI)常常超标的现象时有发生。
发明内容
本申请实施例的目的之一在于提供一种抑制电磁干扰的方法以及装置，用以解决现有技术中网络变压器难以或者根本无法消除干扰信号，实现了抑制或者减弱EMI的目的。
本申请实施例采用的技术方案如下：
本申请实施例提供一种抑制电磁干扰的方法，其包括：
接收来自IC端的信号并对接收到的信号进行共模抑制处理，以至少消除 或者减弱掺杂在接收到的信号中的干扰信号；
对共模抑制处理后的信号进行耦合处理，以至少获得驱动能力增强的信号，并发送给网口端。
具体的，在一本申请实施例中，所述接收来自IC端的信号并对接收到的信号进行共模抑制处理可以包括：用共模滤波器接收来自IC端的信号并对接收到的信号进行共模抑制处理，以至少消除或者减弱掺杂在接收到的信号中的干扰信号。
具体的，在一本申请实施例中，抑制电磁干扰的方法还可以包括：所述共模滤波器具有一中间抽头，根据IC端芯片的驱动类型，将共模滤波器的中间抽头连接到电源或者接地。
具体的，在一本申请实施例中，所述将共模滤波器的中间抽头连接到电源或者接地可以包括：如果IC端芯片的驱动类型为电压驱动，将共模滤波器的中间抽头连接到电源；如果IC端芯片的驱动类型为电流驱动，将共模滤波器的中间抽头连接到地。
具体的，在一本申请实施例中，所述对共模抑制处理后的信号进行耦合处理可以包括：用耦合变压器对共模抑制处理后的信号进行耦合处理，以至少获得驱动能力增强的信号，并发送给网口端。
具体的，在一本申请实施例中，抑制电磁干扰的方法还可以包括：所述耦合变压器具有一中间抽头，根据IC端芯片的驱动类型，将耦合变压器的中间抽头连接到电源或者接地。
具体的，在一本申请实施例中，所述根据IC端芯片的驱动类型，将耦合变压器的中间抽头连接到电源或者接地可以包括：如果IC端芯片的驱动类型为电压驱动，将耦合变压器的中间抽头连接到电源；如果IC端芯片的驱动类型为电流驱动，将耦合变压器的中间抽头连接到地。
具体的，在一本申请实施例中，所述如果IC端芯片的驱动类型为电压驱动，将耦合变压器的中间抽头连接到电源可以包括：根据IC端芯片的驱动所需驱动电压的大小，将耦合变压器的中间抽头连接到具有匹配电平的电源。
本申请实施例还提供了一种抑制电磁干扰的装置，其包括：
第一电路，设置为接收来自IC端的信号并对接收到的信号进行共模抑制处理，以至少消除或者减弱掺杂在接收到的信号中的干扰信号；
第二电路，设置为对共模抑制处理后的信号进行耦合处理，以至少获得驱动能力增强的信号，并发送给网口端。
具体的，在一本申请实施例中，所述第一电路可以包括共模滤波器，所述第二电路可以包括耦合变压器。
本申请实施例的技术方案具有以下优点：由于首先接收来自IC端的信号并对接收到的信号进行共模抑制处理从而至少预先消除或者减弱了干扰信号；之后再对共模抑制处理后的信号进行耦合处理获得了至少驱动能力增强的信号，并发送给网口端，避免了采用现有技术的方案使得干扰信号放大，很难或者根本无法消除干扰，消除或抑制了电磁干扰，有效解决了诸如电磁干扰(Electromagnetic Interference简称EMI)超标的问题。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例一抑制电磁干扰的方法流程示意图；
图2为本申请实施例二抑制电磁干扰的方法流程示意图；
图3为本申请实施例三抑制电磁干扰的方法流程示意图；
图4为本申请实施例四抑制电磁干扰的装置的结构示意图；
图5为本申请实施例五抑制电磁干扰的装置的结构示意图；
图6为本申请实施例六抑制电磁干扰的装置的结构示意图。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
图1为本申请实施例一抑制电磁干扰的方法流程示意图；如图1所示，其至少可以包括如下步骤：
S101、接收来自IC端的信号并对接收到的信号进行共模抑制处理，以至 少消除或者减弱掺杂在接收到的信号中的干扰信号；
本实施例中，来自IC端的信号可以但不限于包括差分信号。该差分信号都可以分解为共模信号和差模信号。共模信号是作用在差分放大器或仪表放大器两个输入端的相同信号，通常是由于线路传导和空间磁场干扰等产生的，是不希望出现的信号。
在共模抑制处理时，可以使用具体的共模滤波器，共模滤波器可以至少包括共模电感，详细请参见下述图2及其相关描述，在此不再赘述。
需要说明的是，共模滤波器并不是实现本申请实施例的唯一可选方案，也可以使用其他可替代的技术手段，
S102、对共模抑制处理后的信号进行耦合处理，以至少获得驱动能力增强的信号，并发送给网口端。
本实施例中，共模抑制处理后的信号中去除或抑制了由于线路传导和空间磁场干扰等产生的干扰信号，当此处对共模抑制处理后的信号进行耦合处理时，就尽可能避免了尽可能少的干扰信号被放大。
在耦合处理时，可以使用具体的耦合变压器来进行信号的放大，具体的耦合变压器可以至少包括差模耦合线圈，详细请参见下述图3及其相关描述，在此不再赘述。耦合变压器的具体类型可以根据使用的需求，灵活选取，比如全耦合变压器或者松耦合变压器。
图2为本申请实施例二抑制电磁干扰的方法流程示意图；如图2所示，其至少可以包括如下步骤：
S201、用共模滤波器接收来自IC端的信号并对接收到的信号进行共模抑制处理，以至少消除或者减弱掺杂在接收到的信号中的干扰信号。
共模滤波器包括共模电感，共模电感实质上是一个双向滤波器：一方面要滤除信号线上共模电磁干扰，另一方面又要抑制本身不向外发出电磁干扰，避免影响同一电磁环境下其他电子设备的正常工作。
共模电感包括两个共模电感线圈，这两个线圈绕在同一铁芯上，匝数和相位都相同(绕制反向)。这样，当电路中的正常电流流经共模电感时，电流在同相位绕制的电感线圈中产生反向的磁场而相互抵消，此时正常信号电流主要受线圈电阻的影响(和少量因漏感造成的阻尼)；当有共模电流流经线圈时，由于共模电流的同向性，会在线圈内产生同向的磁场而增大线圈的感抗，使 线圈表现为高阻抗，产生较强的阻尼效果，以此衰减共模电流，达到滤波的目的。
需要说明的是，本实施例中，在制作共模电感时参考如下要求：
1)绕制在线圈磁芯上的导线要相互绝缘，以保证在瞬时过电压作用下线圈的匝间不发生击穿短路。
2)当线圈流过瞬时大电流时，保证磁芯不会出现饱和。
3)线圈中的磁芯应与线圈绝缘，以防止在瞬时过电压作用下两者之间发生击穿。
4)线圈应尽可能绕制单层，这样做可减小线圈的寄生电容，增强线圈对瞬时过电压的而授能力。
比如，对于电流驱动型的IC，两线共模电感配合自耦变压器使用，也可以使用三线共模电感，只需要两个磁芯降低了成本。
具体的，上述共模滤波器可以是一个五端器件，其有两个输入端、两个输出端和一个接地端，使用时外壳应接通大地。电路中具体包括共模电感(亦称共模扼流圈)L、滤波电容C1～C4。L对串模干扰不起作用，但当出现共模干扰时，由于两个线圈的磁通方向相同，经过耦合后总电感量迅速增大，因此对共模信号呈现很大的感抗，使之不易通过，故称作共模扼流圈或者共模电感。
在具体实现本实施例过程中，可以采用基于高频干扰抑制对策的小型共模电感，该共模电感的信号不会出现衰减，体积小、使用方便，具有平衡度佳、使用方便、高品质等优点。也可以使用磁芯使用铁氧体，双线并绕，可以对高共模干扰和低差模干扰信号同时抑制，低差模干扰信号抑制干扰源，在高速信号中难以变形，体积小、具有平衡度佳、使用方便、高品质等优点。
本实施例步骤S201中，用共模电感组成的共模滤波器接收来自IC端的信号并对接收到的信号进行共模抑制处理还可以具体包括：所述共模电感具有一中间抽头，根据IC端芯片的驱动类型，将共模电感的中间抽头连接到电源或者接地。具体地，所述将共模电感的中间抽头连接到电源或者接地包括：如果IC端芯片的驱动类型为电压驱动，将共模电感的中间抽头连接到电源；如果IC端芯片的驱动类型为电流驱动，将共模电感的中间抽头通过一电容连接到地。
S202、对共模抑制处理后的信号进行耦合处理，以至少获得驱动能力增强的信号，并发送给网口端。
本实施例中，共模滤波器处理后的差分信号中去除或抑制了由于线路传导和空间磁场干扰等产生的共模干扰信号，当此处对共模抑制处理后的差分信号进行耦合处理时，就尽可能避免了尽可能少的共模干扰信号被放大。
在耦合处理时，可以使用具体的耦合变压器来进行信号的放大，具体的耦合变压器可以至少包括差模耦合线圈，详细请参见下述图3及其相关描述，在此不再赘述。耦合变压器的具体类型可以根据使用的需求，灵活选取，比如全耦合变压器或者松耦合变压器。耦合变压器同时具有保护内部电路的功能以及隔离大电流直流信号的技术作用，在本申请实施例的启发下，本领域普通技术人员无须创造性劳动即可实现，在此不再赘述。
图3为本申请实施例三抑制电磁干扰的方法流程示意图；如图3所示，其至少可以包括如下步骤：
S301、接收来自IC端的信号并对接收到的信号进行共模抑制处理，以至少消除或者减弱掺杂在接收到的信号中的干扰信号；
本实施例中，本步骤的详细描述可参见上述实施例一和二的相关记载，在此不再赘述。
S302、用耦合变压器对共模抑制处理后的信号进行耦合处理，以至少获得驱动能力增强的信号，并发送给网口端。
本实施例中，步骤S302中可以包括：所述耦合变压器具有一中间抽头，根据IC端芯片的驱动类型，将耦合变压器的中间抽头连接到电源或者接地。
具体的，根据IC端芯片的驱动类型，将耦合变压器的中间抽头连接到电源或者接地包括：如果IC端芯片的驱动类型为电压驱动，将耦合变压器的中间抽头连接到电源，具体的，通过一上拉电阻连接电源；如果IC端芯片的驱动类型为电流驱动，将耦合变压器的中间抽头连接到地，具体的，可以通过一电容连接到地。
本实施例中，当IC端芯片的驱动类型为电压驱动，将耦合变压器的中间抽头连接到电源时，可以根据IC端芯片的驱动所需驱动电压的大小，将耦合变压器的中间抽头连接到具有匹配电平的电源。电源的电压值根据芯片来定，可以为3.3V、2.5V、1.8V等等。
本实施例中，耦合变压器进行耦合处理，可以参见现有技术有关记载，在此不再赘述。
图4为本申请实施例四抑制电磁干扰的装置的结构示意图；如图4所示，其至少可以包括如下硬件模块：相互之间电连接并可进行数据通讯的第一电路401以及第二电路402。具体的：
第一电路401设置为接收来自IC端的信号并对接收到的信号进行共模抑制处理，以至少消除或者减弱掺杂在接收到的信号中的干扰信号；
第二电路402设置为对共模抑制处理后的信号进行耦合处理，以至少获得驱动能力增强的信号，并发送给网口端。
图5为本申请实施例五抑制电磁干扰的装置的结构示意图；如图5所示，其至少可以包括如下硬件模块：相互之间电连接并可进行数据通讯的共模滤波器501以及耦合变压器502，共模电感501设置为接收来自IC端的信号并对接收到的信号进行共模抑制处理，以至少消除或者减弱掺杂在接收到的信号中的干扰信号；耦合变压器502设置为对共模抑制处理后的信号进行耦合处理，以至少获得驱动能力增强的信号，并发送给网口端。
在一些必要场景需求下，还可以给上述图4和图5实施例的装置配置外围电路，比如Bob Smith电路，如在使用两线共模电感而IC的驱动类型为电流驱动时。此电路有两种功能：提供网口任意两队差分信号间的阻抗匹配；可以对共模信号提供一个回流路径。
图6为本申请实施例六抑制电磁干扰的装置的结构示意图；如图6所示，其至少可以包括如下硬件模块：相互之间电连接并可进行数据通讯的共模滤波器601以及耦合变压器602，每个模块的技术作用在此不再赘述，在上述本申请实施例的启发下或者现有技术的启发下，即可理解，在此不再赘述。
在此，仅对使用本实施例装置进行处理的时候，信号的流向进行简要描述：来自IC端的最原始的差分信号从共模滤波器的个人识别密码(PIN)9/11/14/16 4个PIN脚输入，通过流经共模滤波器的共模电感601、耦合变压器602，从耦合变压器602的PIN1\3\6\8 4个PIN脚输出，输出到网口端。
PIN 9/11/14/16为信号的输入端、PIN1\3\6\8为信号的输出端，PIN10\15\2\7为中间抽头，可接地或者接电源。
上述实施例中，IC端的芯片包括但不限于PHY芯片。
需要说明的是，在实际应用本申请实施例时，可以包括多组共模滤波器601以及耦合变压器602，以满足抑制电磁干扰、放大信号等的特定需求。
以上所描述的装置实施例仅仅是示意性的，其中所述作为分离部件说明的模块可以是或者也可以不是物理上分开的，作为模块显示的部件可以是或者也可以不是物理模块，即可以位于一个地方，或者也可以分布到多个网络模块上。可以根据实际的需要选择其中的部分或者全部模块来实现本实施例方案的目的。本领域普通技术人员在不付出创造性的劳动的情况下，即可以理解并实施。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到各实施方式可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件。
最后应说明的是：以上实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的精神和范围。

Claims (10)

  1. 一种抑制电磁干扰的方法，其特征在于，包括：
    接收来自IC端的信号并对接收到的信号进行共模抑制处理，以至少消除或者减弱掺杂在接收到的信号中的干扰信号；
    对共模抑制处理后的信号进行耦合处理，以至少获得驱动能力增强的信号，并发送给网口端。
  2. 根据权利要求1所述的方法，其特征在于，所述接收来自IC端的信号并对接收到的信号进行共模抑制处理，包括：用共模滤波器接收来自IC端的信号并对接收到的信号进行共模抑制处理，以至少消除或者减弱掺杂在接收到的信号中的干扰信号。
  3. 根据权利要求1所述的方法，其特征在于，还包括：所述共模滤波器具有一中间抽头，根据IC端芯片的驱动类型，将共模滤波器的中间抽头连接到电源或者接地。
  4. 根据权利要求3所述的方法，其特征在于，所述将共模滤波器的中间抽头连接到电源或者接地包括：如果IC端芯片的驱动类型为电压驱动，将共模滤波器的中间抽头连接到电源；如果IC端芯片的驱动类型为电流驱动，将共模滤波器的中间抽头连接到地。
  5. 根据权利要求1所述的方法，其特征在于，所述对共模抑制处理后的信号进行耦合处理包括：用耦合变压器对共模抑制处理后的信号进行耦合处理，以至少获得驱动能力增强的信号，并发送给网口端。
  6. 根据权利要求5所述的方法，其特征在于，还包括：所述耦合变压器具有一中间抽头，根据IC端芯片的驱动类型，将耦合变压器的中间抽头连接到电源或者接地。
  7. 根据权利要求6所述的方法，其特征在于，所述根据IC端芯片的驱动类型，将耦合变压器的中间抽头连接到电源或者接地包括：如果IC端芯片的驱动类型为电压驱动，将耦合变压器的中间抽头连接到电源；如果IC端芯片的驱动类型为电流驱动，将耦合变压器的中间抽头连接到地。
  8. 根据权利要求7所述的方法，其特征在于，所述如果IC端芯片的驱动类型为电压驱动，将耦合变压器的中间抽头连接到电源包括：根据IC端芯片的驱动所需驱动电压的大小，将耦合变压器的中间抽头连接到具有匹配电 平的电源。
  9. 一种抑制电磁干扰的装置，其特征在于，包括：
    第一电路，设置为接收来自IC端的信号并对接收到的信号进行共模抑制处理，以至少消除或者减弱掺杂在接收到的信号中的干扰信号；
    第二电路，设置为对共模抑制处理后的信号进行耦合处理，以至少获得驱动能力增强的信号，并发送给网口端。
  10. 根据权利要求9所述的装置，其特征在于，所述第一电路包括用共模滤波器，所述第二电路包括耦合变压器。
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