When processing and testing high-frequency PCB boards and high-frequency antennas, beginners often choose the wrong high-frequency PCB, which leads to unsatisfactory product results. Today, let’s talk briefly about what are the high-frequency PCB boards? How to choose? (The following text is reproduced from the Internet, and everyone is welcome to supplement and correct.) Definition of…
Today’s switching regulators and power supplies are more sophisticated and powerful, but one of the challenges they face is that the ever-increasing switching frequencies make PCB design more difficult. PCB layout is becoming a watershed that distinguishes a good switching power supply design from a bad one. This article will provide suggestions on how to…
It’s no secret that designers are squeezing more performance out of printed circuit boards. Power densities are rising, and with them come higher temperatures that can wreak havoc on conductors and dielectrics. Increased temperatures—whether from I2R losses or environmental factors—affect thermal and electrical impedances, leading to erratic system performance, if not outright failure. Differences in…
1.Main functions of PCB circuit board tester The tester adopts circuit online testing technology, which can be used to test and analyze common faults of various small and medium-scale integrated circuit chips online or offline, and test the V/I characteristics of analog and digital devices. •Node voltage test Since the test object of the tester…
1.Introduction to PCB PCB is the abbreviation of Printed Circuit Board. Printed circuit board is a substrate for assembling electronic parts. It is a printed board with point-to-point connections and printed components on a general substrate according to a predetermined design. The main function of this product is to connect various electronic components to form…
1.Conditioning Hole Conditioning This word refers to the “adjustment” or “adaptation” of the self in a broad sense, so that it can adapt to the subsequent conditions. In a narrow sense, it means that the dry board and hole wall are made “hydrophilic” and “positively charged” before entering the PTH process, and the cleaning work…
PCB design to software processing to introduce the handling of electromagnetic compatibility. First, the factors that affect EMC 1, the voltage: the higher the power supply voltage, means that the greater the voltage amplitude, the more emission, and low power supply voltage sensitivity. 2, frequency: high-frequency produce more emissions, periodic signals produce more emissions. In…
When it comes to PCB boards, many friends will think of it everywhere around us, from all household appliances, various accessories in computers, to various digital products. Almost all electronic products will use PCB boards, so what exactly is a PCB board? PCB board is Printed Circuit Block, that is, a printed circuit board for…
The main technical requirements are: Size requirements, including board size and deviation, thickness and deviation, verticality and warpage; appearance, including requirements for cracks, scratches, burrs and delamination, aluminum oxide film, etc.; performance, including peel strength, surface resistivity, minimum breakdown voltage, dielectric constant, flammability and thermal resistance. Special testing methods for aluminum-based copper-clad laminates: First, the…
Layout 10 rules for component layout: Wiring (1) Wiring priority Key signal line priority: key signals such as analog small signals, high-speed signals, clock signals and synchronization signals should be routed first Density priority principle: start routing from the device with the most complex connection relationship on the single board. Start routing from the area…
As mentioned earlier, PCB design is an extremely important process and is probably the most critical part of an electronics engineer’s job. To create a PCB layout design, you need a tried-and-true PCB design software to help you lay out your circuits. PCB design software generates the mechanical and wiring connection structures of the PCB…
PCB (Printed Circuit Board), Chinese name is printed circuit board, also known as printed circuit board, is an important electronic component, the support of electronic components, and the carrier of electrical connection of electronic components. Because it is made by electronic printing, it is called a “printed” circuit board. A double-layer PCB board is a…
Impedance, engineers have all come into contact with it, but few engineers can explain it clearly. Impedance seems simple, but it is actually difficult to express. Let’s use a quick question and answer method to help you understand impedance easily! 01 Q: What is impedance? A: In a circuit with resistance, inductance and capacitance, the…
1.What is ESD? ESD stands for electrostatic discharge. Many materials can conduct electricity and accumulate charge. ESD occurs due to triboelectric charging (friction between materials) or electrostatic induction. Whenever this happens, an object develops a fixed charge (static electricity) on its surface. When this object is placed too close to another charged object or material,…
In design, layout is an important link. The quality of layout results will directly affect the effect of wiring. Therefore, it can be considered that reasonable layout is the first step to successful PCB design. Especially pre-layout, it is a process of thinking about the entire circuit board, signal flow, heat dissipation, structure and other…
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