pcb design
1. Common ground processing of digital circuits and analog circuits Nowadays, many PCBs are no longer single-functional circuits (digital or analog circuits), but are composed of a mixture of digital and analog circuits. Therefore, it is necessary to consider the mutual interference between them when wiring, especially the noise interference on the ground line. The…
Circuit boards catching fire, components smoking, or even exploding are the daily routine of many electronic engineers, especially power boards that require excessive current. High voltage and current are very easy to catch fire – so how to avoid pitfalls? For this kind of problem In this case, of course I choose to design it…
The circuit material of a printed circuit board (PCB) is a key building block of radio frequency (RF)/microwave circuits – essentially the starting point for these circuits. PCB materials come in many different forms, and material selection depends largely on the requirements of the intended application. For example, materials that reliably support high-frequency circuits in…
Radiation generation Current causes radiation, not voltage, static charges produce electrostatic fields, constant currents produce magnetic fields, and time-varying currents produce both electric and magnetic fields. There are common mode current and differential mode current in any circuit. The differential mode signal carries data or useful signal, and the common mode signal is the negative…
1 Introduction In the production process of circuit boards, most manufacturers still use the wet film process for imaging due to cost considerations, which will inevitably cause undesirable problems such as “bleeding, bright edges (tin thin)” when pattern plating pure tin. In view of this , I will discuss with you the solutions to common…
Detection before power on After a circuit board is soldered, when checking whether the circuit board can work normally, you usually do not directly power the circuit board, but follow the following steps. It is not too late to power on after ensuring that there are no problems in each step. 1. Is the connection…
Figure 1(a), shows a simulation of vertical heat flow from a trace across the board to the other side. Simulations are for 100 mil wide, 1.0 oz. On the top layer of a 63 mil thick FR4 board, the thick traces are heated to almost 58 oC. This number seems impressive, but it is misleading…
LED display unit board PCB design rules 1. General principles (1) When the design rules are met, the production cost should be reduced as much as possible. For example, if two-layer boards can be used, try to use two-layer boards; when the cost conflicts with the design rules, the design rules should be guaranteed. (2)…
1. Preparation for PCB design Including preparation of component libraries and schematics. Before doing PCB design, you must first prepare the schematic SCH component library and PCB component packaging library. The PCB component packaging library is best established by engineers based on the standard size data of the selected devices. In principle, the PC component…
What is PCB copper clad laminate? I often hear circuit board manufacturers mention PCB copper clad laminate. What exactly is PCB copper clad laminate? Don’t worry,I will help you understand PCB copper clad laminates. PCB copper clad laminate refers to coating a layer of copper foil on the surface of the base material of PCB…
Automotive electronics are not completely different from other complex electronic products: multiple CPUs, networks, real-time data collection, and extremely complex PCBs. Design pressures in the automotive industry are similar to other types of electronic products: design times are short and market competition is fierce. So what is the difference between automotive electronics and, for example,…