RF circuit board design is often described as a kind of "black art" due to many theoretical uncertainties, but this view is only partially correct, RF circuit board design also has many guidelines to follow and should not be ignored. In practical design, however, the real trick is to compromise these guidelines and rules when [...]
5G technology change, radio frequency is the most significant, PCB both offensive and defensive The wave of 5G construction that will start in 2019 will open up new space for the upstream industry. Considering the increase of frequency and reduction of time delay, 5G is not only different from 4G in system architecture design, but [...]
The price of PCB is something that many purchasers have always been confused about, and many people would also question how to calculate these prices when placing orders online. Now we will discuss the components of PCB price together. I. different materials used in PCB cause price diversity Common double face plate is an example, [...]
Those who have experienced electromagnetic interference and those who have not. With the increase of PCB routing express, emc design is a problem that we electronic engineers have to consider. For a design, there are five important attributes to consider when conducting EMC analysis of a product and design: (1) key device size: the physical [...]
Emi problems in printed circuit boards include common impedance coupling, crosstalk, radiation from high-frequency current-carrying wires, and induction of printed lines to high-frequency radiation. The following describes the PCB design in order to meet the electromagnetic compatibility must pay attention to matters. 1. The common impedance coupling problems in PCB for analog and digital circuit [...]
Before designing a multilayer PCB, the designer needs to first determine the structure of the circuit board according to the size of the circuit board, the size of the circuit board and electromagnetic compatibility (EMC) requirements, that is, to decide whether to use four, six or more layers of the circuit board. After the number [...]
Circuit design is a basic skill for an electronic engineer. However, even if the circuit schematic diagram is perfect, if the common problems and challenges are not understood and prevented in the process of converting to PCB circuit board, the whole system will still be greatly compromised and will not work at all in serious [...]
1. Pay attention to the definition of pin and package name when making the schematic library When making the package library, pay attention to the corresponding principle diagram pin; If the pins do not correspond, the components will be isolated when the PCB diagram is obtained. 2. Any routing on the PCB will cause time [...]
The basic process of the circuit board can be divided into three steps: circuit schematic design, generation of network table, printed circuit board design. There are specific requirements for both device layout and wiring on the board. For example, input and output wiring should be avoided parallel to avoid interference. It is necessary to add [...]
I. board checking method: 1. Observation method: there is no burning, burning, blister, plate surface broken line, socket corrosion. 2. Table measurement: whether the resistance of +5V and GND is too small (below 50 ohms). 3. Power on check: for the clear has broken board, can slightly increase the voltage 0. 5-1v, use the IC [...]