Author Archives: allaismt

There is a limit to how many circuits can be installed on a board. For the sake of manufacturing equipment and standard panel size, PCB itself has an upper size limit. The number of transistors on a device continues to expand, while resistors and capacitors almost disappear to the naked eye. Even with all integration […]

Pcb circuit boards that provide power supply are almost all called power boards, and power boards are machine boards that mainly deal with power supply initiating functions. The smt process flow of power board can be basically divided into three processes: automatic mounting of SMT components, wave soldering plug-in, and manual operation. Then, what are […]

The increasing importance of laminating and laminating technology in all of these industries, including PCB, is increasing rapidly. In order to prevent quality problems, such as dislocation, during lamination, it is usually required to integrate PCB manufacturing processes before lamination. Compared with traditional fusion technology, modern fusion technology has the advantages of high efficiency, easy […]

1 Why do you want to divide digital ground and analog ground? Although it is interlinked, it is different when the distance is long. The voltage at different points of the same wire may be different, especially when the current is large. Because there is resistance in the wire, the voltage drop will occur when […]

In a grounded desktop product, when the ESD contact discharge test with a test voltage of 6KV was conducted at the grounding terminal, the system was reset. In the test, try to disconnect the grounding terminal from the Y capacitor connected to the internal digital working ground, but the test result has not improved significantly. […]

In the process of PCB design, some engineers don’t want to lay copper on the bottom of the surface layer in order to save time. Is this the right thing to do? Is it necessary to lay copper on the surface layer of PCB? First of all, we need to be clear: it is beneficial […]

First, the structure and types of metal-based copper clad laminate Metal-based copper clad laminate is generally composed of three parts: metal substrate, insulating dielectric layer and conductive layer (generally copper foil), that is, one or both surfaces of the treated metal substrate are covered with insulating dielectric layer and copper foil, which are compounded by […]

1, PCB layout/wiring, the impact on electrical performance is often seen in books about electronics, saying “digital ground wire should be separated from analog ground wire”. Anyone who has laid the board knows that it is difficult in practice. To lay out a better board, first of all, you have to have an electrical understanding […]

At present, high-speed PCB design is widely used in communication, computer, graphics and image processing and other fields. In these fields, engineers use different high-speed PCB design strategies, which involve over-design strategies of simulation and analysis. In the field of telecommunications, the design is very complicated, and the transmission speed in data, voice and image […]

EMI is caused by electromagnetic interference source transferring energy to sensitive system through coupling path. It includes three basic forms: conduction through wires or common ground wires, space radiation or near-field coupling. The harm of EMI is to reduce the quality of transmission signal, cause interference or even damage to the circuit or equipment, and […]