electrostatic wristband

. Ferrite Magnetic rings or magnetic beads are used to suppress high-frequency interference and Spike interference on signal lines and power cables. They also have the ability to absorb electrostatic discharge pulse interference.The size of the two elements is proportional to the length of the magnetic beads, and the length of the magnetic beads has a significant impact on the inhibition effect. The longer the length of the magnetic beads, the better

? Although the inverter is a static device, it also consumes devices like filter capacitors and cooling fans. If regular maintenance is performed on them, it is expected to have a life of more than 10 years. 32. There is a cooling fan in the inverter. What is the direction of the wind? What if the fan breaks down? There is no cooling fan type for small capacity. There is a fan of the machine type, the direction of the wind is from the bottom up, so the local installation of the inverter, the upp

Z crystal resonator are shown. When the crystal does not vibrate, it can be regarded as a flat capacitor called electrostatic capacitor C. Its size is related to the chip's geometric size and electrode area, generally about several pf to dozens of PF. When the crystal oscillates, the inertia of mechanical vibration can be equivalent to inductance L. Generally, the L value is dozens of MH.To several hundred MH. The flexibility of the chip can be equiv

"Reprint Please specify source" Http://www.cnblogs.com/mashiqi2016/12/121. Gauss's Law (Gauss's Laws): electric fieldThe electric charge (electic charges) produces a static electric field (static electric field). The electrostatic field line starts at a positive charge and points to a negative charge. The total amount of charge in any area is proportional to the second-type area of the corresponding electric field on the surface of the area. Represent

set the jumper, we often cannot hold the Jumper cap with our fingers. We recommend that you use pliers or tweezers to insert and remove the Jumper cap. 3. overclocking jumper There is no uniform practice for various manufacturers About overclocking jumpers. Therefore, overclocking friends need to refer to the technical specifications and related parameters of various motherboard manufacturers, I suggest you carefully read the motherboard manual or consult the customer service department of the

contact with the outside world, eliminate the sources of dust, and maintain the air cleaning of the data center.3. Maintain the IDC environment humidity. Strictly control the air humidity of the data center, that is, to ensure that dust is reduced, and to avoid corrosion and short circuit caused by air humidity.4. Strict personnel access control. An access control system is set up to prevent unauthorized personnel from entering the IDC room. Strict control is also required for personnel enterin

line), and conductive interference is through the power line or signal line and other lines, the interference energy is directly coupled or injected into DUT or line. The type of disturbance energy includes two types: continuous wave and transient wave, which are divided into two coupling modes: radiation and conductivity. The anti-disturbance test method can be subdivided into four categories: continuous wave transmission, continuous wave radiation, transient conduction (transiet) and

component increases, as a result, the total impedance increases. When high-frequency signals pass through ferrite, electromagnetic interference is absorbed and converted into heat energy for dissipation.Ferrite suppression elements are widely used in printed circuit boards, power cords, and data cables. For example, if a ferrite suppression element is added to the power cord inlet of the printed board, high-frequency interference can be filtered out. Ferrite Magnetic rings or magnetic beads are

, the time-varying field replaces the fixed field, and the structured field replaces the non-structured field, which reflects the dynamic law in the system evolution. Mobile and time-varying fields are more mobile than prohibited and fixed fields, and structured fields are more controllable than non-structured fields. From the information point of view, the more variable the thing contains the more information, the more features that can be used for us. The gravity field,

ROM and ram. Chip Install decoupling nextCapacitor . In fact, printed circuit board cabling, pin connections, and wiring may all contain a large inductance effect. A large inductance may cause a severe switch noise Spike when the VCC goes online. The only way to prevent the VCC from switching noise spikes is Power Supply Place a 0.1uf Electronics Decoupling capacitor. If a surface mount component is used on the circuit board, you can use the slice capacitor to directly pin the component and fix

whether the connection is good. You can use a multimeter to measure the connection. Place the Multimeter in the resistance position of x10, and contact one watch needle of the wanzhi beads with the corresponding core wire at the other end of the network cable, another 10 thousand use the table pen contact information module card into the corresponding color core line of the card trough edge note not contact core line), if the resistance is small, it proves that the information module is connect

attenuation of signals in cable transmission. It is a key parameter that determines the available bandwidth. External Noise Noise enters the channel through external electromagnetic fields near the channel. Non-Direct electrostatic discharge (ESD) or fast current transient (EFT) is one of the external noise sources. In the cabling system of the company, products with excellent balancing performance solve this noise problem. Balancing is the degree to

, M corresponds to 38U, and m corresponds to 42U, 2 m corresponds to 47U. Ii. Concept of Grounding If the ground is grounded by signals or the chassis is connected to the earth, the signal grounding function of the device is to provide the level reference plane of some or all circuits of the device, the Ideal Grounding plane is a physical entity with zero potential and zero impedance. No voltage drop is generated when any current passes through it. Generally, there is a special grounding Copper

principle of electromagnetic shielding is to use metal shielding materials to block the electromagnetic interference source, so that the external electromagnetic intensity is lower than the allowable value; or use a metal shielding material to close the electromagnetic sensitive circuit so that its internal electromagnetic field strength is lower than the allowable value. 1. electrostatic Shielding: a complete metal shielding body is used to enclose

decoupling capacitor between VCC and the power source. If a surface mount element is used on the circuit board, it can be fastened directly to the component with a chip capacitor on the VCC pin. It is best to use ceramic capacitors because they have low electrostatic loss (ESL) and high-frequency impedance, and the dielectric stability of this capacitor temperature and time is good. Try not to use tantalum capacitors, because at high frequencies, it

As a professional hardware design and testing engineer, we use a variety of different digital oscilloscopes for the measurement of the relevant electrical signal volume every day. There are also a wide range of probes that match these oscilloscopes, including passive probes (including high-voltage probes, transmission line probes), active probes (including active single-ended probes, active differential probes, etc.), current probes, light probes, etc. Each probe has its advantages and disadvant

Daily life commonly used to self-adhesive, do not know that we have not noticed that the material is different stickers, and a lot of kinds, let us look at the stickers have those materials.The first is the surface material, there are double glue paper, coated, transparent PVC, electrostatic PVC, polyester pet, laser paper, heat-resistant paper, PP, PC, kraft paper, fluorescent papers, thermal paper, copper wire dragon, Silver dragon, gold-plated pape

highest 1.5mb/s speed, either through the d+ pin or the D-pin (two stitches in the middle). Speed limit is due to the fact that the HCI device is always declared as a "low Speed Device" (USB 2.0 compliance) This serial signal is decoded at the computer's USB controller and is further explained by the universal keyboard driver for the man-machine interaction device. The code values of the keys are then transferred to the hardware abstraction layer of the operating system Virtual keyboar

I. PrefaceToday, we want to learn through experiments and understand the use of the watchdog, the watchdog is to prevent the program to fly, through constant feeding to the dog, so that the watchdog can continue to monitor the running state of the program, when the program runs fly, can promptly pull back the program.Two. Principle and analysisThe watchdog timer (WDT) is used as a recovery method in cases where the CPU may be subject to a software disruption. WDT must reset the system when the s

Thursday!!! The temperature drop is getting lower, this is let small make a good early work ah, bed, you hurriedly let me go, I also give you oscer Maixiao. The wind is big! @ Open Source China chief dynamic: February Spring Breeze like scissors, December wind is like Tsing Lung Yan Moon DAO! Formerly said the wind like mother's hand gently stroked us, and now the wind is like a stepmother's Shouda mouth to die in the cry Ah!! Now every time you go out, you will be beaten by nature. @ Stroll the