A dashcam needs to add an external adapter when testing. When the machine is powered on and tested, it is found that the radiation exceeds the standard. The specific frequencies are 84MHz, 144MHz, and 168MHz. It is necessary to analyze the reasons for the excessive radiation and give corresponding countermeasures. The radiation test data is…
The circuit materials of printed circuit boards (PCBs) are key building blocks of radio frequency (RF)/microwave circuits – essentially the starting point of these circuits. PCB materials come in many different forms, and the choice of materials depends largely on the requirements of the intended application. For example, materials that reliably support high-frequency circuits in…
1.[Delamination] Delamination is a long-standing problem of PCB, and ranks first among common problems. The reasons for its occurrence may be as follows: (1) Improper packaging or storage, dampness; (2) Storage time is too long, exceeding the shelf life, PCB board dampness; (3) Supplier material or process problems; (4) Poor design material selection and copper…
Explore the top flexible circuit manufacturers transforming technology with innovative designs, cutting-edge processes, and high-reliability products. Discover their impact across industries like aerospace, medical, and telecommunications.
As many people always ask this question, so here to make a summary document for your reference. Here must first explain the following steps are for the Linux system, not for WinCE. Perhaps you will notice that now do embedded people, people who do linux research is far more than people who do WinCE, many…
The advantage of the immersion gold process is that the color deposited on the surface of the printed circuit is very stable, the brightness is very good, the coating is very flat, and the solderability is very good. The thickness of the gold in the immersion gold is generally 1-3 Uinch, so the thickness of…
Explore the leading flexible circuit board manufacturers shaping innovative solutions. Discover their capabilities in design flexibility, space reduction, and lightweight construction, essential for advancing modern technology and product development.
Electromagnetic compatibility design often uses various control techniques. In general, the closer to the EMI source, the lower the cost of implementing EM control. Integrated circuit chips on PCBs are the primary source of energy for EMI, thereby simplifying EMI control in PCBs and system-level designs with a deep understanding of the internal features of…
First, the role of driving The operation of any computer system is the result of collaboration between hardware and software in the system. Software without hardware is a paragon, while hardware without software is just a pile of scrap metal. Hardware is the underlying foundations, a platform where all software can run, and the code…
The main reason for the peak current is: The T3 and T4 tubes of the output stage are turned on at the same time in the short design. In the process of the NAND gate switching from low output level to high output level, the negative jump of the input voltage generates a large reverse…
Printed circuit boards (PCBs) are convenient thin sheets used to house interconnected electrical components in a simple, convenient and economical manner. They are used as a physical support for mounting and connecting different electrical components. PCBs are made of fiberglass, composite epoxy or any other composite material with a metal coated surface. They have an…
Simple Meaning of Nouns The via cover oil, ie the solder ring of the via, is covered with ink. Through-hole windowing: The through-hole (via) solder ring exposed (as exposed as a component pad) on the tin, generally can be used to debug the measurement signal, the disadvantage is likely to cause a short circuit. Via…
As the I / O port output time, the output low 0 output high for the high configuration (not 5V, equivalent to the floating state, that is, P0 port can not really output high). Current is supplied to the load to which it is connected, so a resistor connected to VCC must be connected to…
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…
The wiring is an extremely important part of the PCB design and it will directly affect the performance of the PCB board. In the PCB design process, layout engineers all have their own understanding of the layout, but all layout engineers are consistent in how to improve the efficiency of wiring, so that not only…
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