Expertise in R&D and Manufacturing of Kitchen Appliances intelligent Controllers View all

Industry News

4 questions related to high-speed PCB

Views : 783
Update time : 2021-05-25 10:02:00
  1. How to consider impedance matching when designing high-speed PCB design schematics?

When designing high-speed PCB circuits, impedance matching is one of the design elements. The impedance value has an absolute relationship with the wiring method, which means that the impedance value can only be determined after wiring.Generally, simulation software cannot take into account some wiring conditions with discontinuous impedance due to the limitation of the circuit model or the mathematical algorithm used. At this time, only some terminators, such as series resistance, can be reserved on the schematic diagram to ease the wiring impedance. Discontinuous effect. The real solution to the problem is to try to avoid impedance discontinuities when wiring.
  1. When designing high-speed PCBs, which aspects should designers consider EMC and EMI rules?

Generally, EMI/EMC design needs to consider both radiation and conduction. The former belongs to the higher frequency part (<30MHz) and the latter is the lower frequency part (<30MHz). So you can't just pay attention to the high frequency and ignore the low frequency part.
A good EMI/EMC design must take into account the location of the device, PCB stack arrangement, important connection method, device selection, etc. at the beginning of the layout. If there is no better arrangement beforehand, it will be solved afterwards. It will get twice the result with half the effort and increase the cost.
In addition, pay attention to the return path of high-frequency signal current to make the loop area as small as possible (that is, loop impedance as small as possible) to reduce radiation. The ground can also be divided to control the range of high-frequency noise. Finally, properly choose the chassis ground between the PCB and the housing.

  1. When making PCB boards, in order to reduce interference, should the ground wire form a closed-sum form?

When making PCB boards, the loop area is generally reduced in order to reduce interference. When laying the ground line, it should not be laid in a closed form, but it is better to arrange it in a branch shape, and the area of the ground should be increased as much as possible.
  1. How to adjust the routing topology to improve signal integrity?

This kind of network signal direction is more complicated, because for unidirectional, bidirectional signals, and different level types of signals, the topology influences are different, and it is difficult to say which topology is beneficial to the signal quality. And when doing pre-simulation, which topology to use is very demanding for engineers, and requires understanding of circuit principles, signal types, and even wiring difficulty.
Related News
How can kitchen appliance control boards prevent interference?
How can kitchen appliance control boards prevent interference?
Sep .30.2022
As a professional R&D and manufacturer of kitchen appliance control boards, Elecontro® has more than 20 years of experience in it. We will listen to your ideas and use our professional experience to formulate a set of the most perfect manufacturing solutions to accelerate the time to market of your products.
How to avoid the side effects of range hoods !
How to avoid the side effects of range hoods !
Sep .23.2022
Elecontro®, as a professional R&D and manufacturer of kitchen electric controllers, its self-developed range hood controller has ultra-high safety performance detection. It can automatically power off when abnormality is detected, and it can safely protect every day. Let your kitchen change Smoke free and safe.
How to Use the Oven ?
How to Use the Oven ?
Sep .22.2022
Elecontro®-Professional research and development and manufacture of oven controllers, which can make your oven work better, more efficient, safer and more convenient in baking food. The food is more delicious, the operation is easier, and the temperature and time can be precisely controlled.
SMT Testing Technology Service Description
SMT Testing Technology Service Description
Sep .13.2022
As a professional home appliance controller supplier, Elecontro® has advanced technical equipment and complete quality inspection procedures. The inspection method is one of the indispensable technologies today, and inspection is the guarantee of product quality and environmental safety. In order to improve everyone's understanding of Elecontro® inspection technology and inspection equipment, this article will introduce the types of SMT inspection technology.
google-site-verification: googlec39da6d6b6012258.html