Description: 几乎所有设备的传导干扰都包含共模噪音和差模噪音，开关电源也不例外。共模干扰是由于载流导体与大地之间的电位差产生的，其特点是两条线上的杂讯电压是同电位同向的；而差模干扰则是由于载流导体之间的电位差产生的，其特点是两条线上的杂讯电压是同电位反向的。-almost all the equipment includes EMI common mode noise and differential mode noise, switching power supply is no exception. Common mode noise is due to current carrying conductor between the earth and the potential of the poor, Its characteristics are two lines of noise voltage is the same with the potential to; while differential mode interference is the result of current-carrying conductor of the potential difference, Its characteristics are two lines of noise voltage potential is the reverse of the same. Platform: |
Size: 50260 |
Author:钱立志 |
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Description: 几乎所有设备的传导干扰都包含共模噪音和差模噪音，开关电源也不例外。共模干扰是由于载流导体与大地之间的电位差产生的，其特点是两条线上的杂讯电压是同电位同向的；而差模干扰则是由于载流导体之间的电位差产生的，其特点是两条线上的杂讯电压是同电位反向的。-almost all the equipment includes EMI common mode noise and differential mode noise, switching power supply is no exception. Common mode noise is due to current carrying conductor between the earth and the potential of the poor, Its characteristics are two lines of noise voltage is the same with the potential to; while differential mode interference is the result of current-carrying conductor of the potential difference, Its characteristics are two lines of noise voltage potential is the reverse of the same. Platform: |
Size: 50176 |
Author: |
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Description: 常用于热电偶、应变电桥、流量计、生物电测量以及其它具有较大共模干扰的直流缓变微弱信号的检测。
-Commonly used in thermocouples, strain bridge, flow meters, bio-electrical measurements, as well as other greater common-mode interference in a weak slowly varying DC signal detection. Platform: |
Size: 1504256 |
Author:tutu |
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Description: 由于EMC所面临解决问题大多是共模干扰，因此共模电感也是我们常用的有力元件之一！-Facing due to EMC problems are common-mode interference, so common-mode inductance is also commonly used as one component of the strong! Platform: |
Size: 55296 |
Author:朱子庚 |
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Description: 为了匹配信道特性达到较佳的传输效果，应选用适当码型，以便在最小传输带宽的条件下大大减小或消除这种干扰。选用了MATLAB软件进行了仿真，设计实现了一些简单的常用码型-In order to match the channel transmission characteristics to achieve better results, should use the appropriate code type, so that under the conditions of minimum transmission bandwidth substantially reduce or eliminate such interference. Use of the MATLAB simulation software, designed and implemented some simple common pattern Platform: |
Size: 104448 |
Author:nana |
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Description: 在许多测试场合，传感器输出的信号往往很微弱，而且伴随有很大的共模电压（包括干扰电压），一般对这种信号需要采用测量放大器。测量放大器是一种高增益、直流耦合放大器，它具有差分输入、单端输出、高输入阻抗和高共模抑制比等特点。请设计一个测量放大器：
指标要求：
a.当输入信号峰峰值uip-p=1mV时，输出电压信号峰峰值uop-p=1V。
b.输入阻抗：Ri>1MΩ
c. 频带宽度： Δf（-3dB）=1Hz~1kHz
d.共模抑制比： CMRR > 70dB
-In many testing situations, the sensor output signal is often very weak, and with a large common mode voltage (including the interference voltage), generally requires the use of this signal measuring amplifier. Measuring amplifier is a high-gain, DC-coupled amplifier, it has a differential input, single-ended output, high input impedance and high common mode rejection ratio and so on. Please design a measuring amplifier: the indicator: a. When the input signal peak-uip-p = 1mV, the output voltage signal peak uop-p = 1V. b. Input impedance: Ri> 1MΩ c. bandwidth: Δf (-3dB) = 1Hz ~ 1kHz d. common mode rejection ratio: CMRR> 70dB Platform: |
Size: 217088 |
Author:王雨来 |
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Description: RS-485采用平衡发送和差分接收，因此具有抑制共模干扰的能力-RS-485 uses balanced differential transmit and receive, so has the ability to suppress common mode interference Platform: |
Size: 151552 |
Author:安拉 |
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Description: rs485的编程实现真正意义上的双向的多点的通信，差分接收，去共模干扰。-The rs485 Programming achieve two-way multi-point communication, in the true sense of the differential receiver to common mode interference. Platform: |
Size: 627712 |
Author:李军 |
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Description: Abstract— Very-high-speed digital subscriber loop modems
operate in frequency bands, which coincide with many significant
radio-frequency interference sources, particularly commercial
AM radio. In these bands, the balance of most twisted-pair cables
is low enough to allow substantial interference to transfer to
differential mode, disrupting the transmitted information signal.
A novel wideband common-mode noise cancellation technique is
presented. Simulation results show that the common-mode noise
cancellation technique could provide 20- to 30-dB improvement
in those radio frequency bands. Construction and testing of a
hardware prototype are also presented. With finite-precision
effects, measured test results show that common-mode noise
cancellation in the order of 15–20 dB is achievable. Platform: |
Size: 1042432 |
Author:manar |
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Description: RS-485采用平衡发送和差分接收，因此具有抑制共模干扰的能力。加上总线收发器具有高灵敏度，能检测低至200mV的电压，故传输信号能在千米以外得到恢复。-RS-485 uses balanced differential transmit and receive, so it has the ability to suppress common mode interference. Plus bus transceiver with high sensitivity, can detect voltages as low as 200mV, so the transmitted signal can be restored in kilometers. Platform: |
Size: 276480 |
Author:zhuxy |
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Description: 完全替换 PCA82C250 的 TJA 1 040 高速 CAN 总线收发器
特征
• 完全符合 ISO 11898 标准
• 速度高 高达 1Mbaud
• 电磁辐射 EME 非常低
• 差动接收器具有较宽的共模范围 可抗电磁干扰 EMI
• 处于不上电状态的收发器会从总线脱离 零负载
• 输入级符合 3.3V 和 5V 的器件
• 如果使用分裂终端 电压源可以稳定隐性总线电平 进一步改善 EME
• 至少可以连接 110 个节点
• 消耗电流极低的待机模式 具有通过总线唤醒 远程 的功能
• 发送数据 TXD 显性超时功能
• 在汽车的瞬态环境下对总线引脚进行保护
• 防止总线引脚和引脚 SPLIT 对电池和对地短路
• 热保护-
PCA82C250 completely replace the TJA 1 040 high-speed CAN bus transceiver
Feature
• Fully ISO 11898 compliant
• High speed up 1Mbaud
• Electromagnetic radiation is very low EME
• differential receiver has a wide common-mode range anti-electromagnetic interference (EMI)
• in non-state transceiver power will be out zero load bus
• Qualifying 3.3V and 5V input devices
• If you use a split terminal voltage source can stabilize the recessive bus level to further improve EME
• At least 110 nodes can be connected
• Very low current consumption in standby mode with wake-up function remotely via the bus
• transmit data TXD dominant time-out function
• vehicles under transient environment protection on the bus pins
• Prevent bus pins and pin SPLIT battery and shorted to ground
• Thermal protection Platform: |
Size: 291840 |
Author:chenmo |
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Description: 在要求通信距离为几十米到上千米时，广泛采用RS-485串行总线标准。RS-485采用平衡发送和差分接收，因此具有抑制共模干扰的能力。-Requiring communication distance of tens of meters to 1000 meters, it is widely used RS-485 serial bus standard. RS-485 balanced differential transmit and receive, so it has the ability to suppress common mode interference. Platform: |
Size: 312320 |
Author:郝虹 |
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Description: 目前，在我国现场控制总线中，RS-485 使用最为普遍。RS－485 总线的共模输出电压在
-7V 至+12V 之间，具有抑制共模干扰的能力，数据传输速率最大为10Mbit/s，当波特率为1200bps 时最大的传输距离理论上可达15 千米。RS－485 网络所具有的设备简单、容易实现、传输距离远、维护方便等优点而被许多变频器厂家所采用。源码基于RS-485 变频器与PC 机串行通信的硬件特性，通信协议及软件实现，实验表明该通信软件稳定可靠，能直观的观看变频器的实际运行状态，并能比较方便的进行多组参数的设定和改写。通过此软件，极大的方便了工程师和客户对变频器的操控和掌握。本源码基于485串口通信的VB控制变频器，其控制电机的速度变化。-At present, in our country in the field control bus, RS- 485 using the most common. RS- 485 bus in the common-mode output voltage
7 v to+ 12 v, have the ability to inhibit common-mode interference, maximum 10 MBPS speed of data transmission, when the baud rate to 1200 BPS transmission distance theory can reach a maximum of 15 km. RS- 485 network of simple equipment, easy to implement, long transmission distance, convenient maintenance and been adopted by many inverter manufacturers. Source based on RS- 485 converter serial communication with a PC hardware features, communication protocol and software implementation, the experiment shows that the communication software is stable and reliable, can be intuitive to watch the actual running condition of frequency converter, and can be convenient for multiple sets of parameters setting and rewrite. Through this software, greatly convenient for engineers and customer manipulation and control of the inverter. The source based on 485 serial po Platform: |
Size: 3072 |
Author:王先生 |
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Description: 关于抗共模干扰的芯片zjy51的芯片资料，相当详细的介绍了zjy51-About resistance to common mode interference chip zjy51 chip information described in considerable detail zjy51 Platform: |
Size: 75776 |
Author:叶东 |
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Description: EMI电源滤波器起到两个低通滤波器的作用:一个是衰减共模干扰，另一个是衰减差模干扰。 EMI电源滤波器能在阻带范围内衰减射频能量，而让工频无衰减，或者很少的衰减，就能通过EMI电源滤波器。 EMI电源滤波器是电子设备设计工程师控制传导电磁干扰和辐射电磁干扰的首选工具。(The EMI power filter plays the role of two low pass filters: one is to attenuate the common mode interference and the other is to attenuate the differential mode interference. The EMI power filter can attenuate radio frequency energy in the range of stopband, and make the power frequency without attenuation, or little attenuation, can pass the EMI power filter. The EMI power filter is the preferred tool for electronic device design engineers to control the transmission of electromagnetic interference and radiation electromagnetic interference.) Platform: |
Size: 16384 |
Author:jjk-8
|
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Description: X,Y电容都是安规电容,火线零线间的是X电容,火线与地间的是Y电容.它们用在电源滤波器里,起到电源滤波作用,分别对共模,差模工扰起滤波作用.
安规电容是指用于这样的场合，即电容器失效后，不会导致电击，不危及人身安全.?
安规电容安全等级应用中允许的峰值脉冲电压过电压等级(X, Y capacitors are all safety regulation capacitors, and the X between the lines is X capacitors. The FireWire and the ground are the Y capacitors. They are used in the power filter and play the role of power filter, which plays the role of common mode and differential mode interference.
The capacitor is used for such occasions, the capacitor failure, will not cause electric shock, do not endanger the safety of.
Permissible peak pulse voltage overvoltage level in application of safety grade of safety gauge) Platform: |
Size: 89088 |
Author:jjk-8
|
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Description: buck电路仿真，亲测可用，适用于做共模干扰问题的朋友(Buck circuit simulation, pro test available, suitable for common mode interference problem friends.) Platform: |
Size: 591872 |
Author:东京的樱花飘过巴黎 |
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Description: STM32外接旋转编码器（EC11），外部中断方式识别出正反转，响应速度优良，无丢步现象，无需延时滤波。在强干扰环境下测试正常。注意是仪器仪表面板常见的那种编码器，不是电机测速的那种。(STM32 Read Encoder (EC11), external interrupt mode to recognizes positive and negative rotation, response speed is excellent, no step loss, no delay use. The programme runs properly in strong interference environment. Notice that the code is used for common type of encoder in instrument panel and the encoder is not the type used for motor's speed measurement.) Platform: |
Size: 1024 |
Author:零落飞 |
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Search - common mode interference