PCB design printed wire width should follow the law
For the signal transmission between the integrated blocks on a printed circuit board, the situation of Td Trd should be avoided. The larger the printed circuit board, the less fast the system speed
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The basic rules of PCB board layout and wiring are described in detail
The output terminals of high-speed CMOS circuits have considerable load capacity, that is, quite large output value. If the output end of a gate is led to the input terminal with quite high input impedance through a very long line, the reflection problem
Discussion on PCB design of switching power supply
For the research and development of switching power supply, PCB design occupies a very important position. A poor PCB, poor EMC performance, output noise, weak anti-interference ability, even the basic function has defects.
Protel DXP drawing process of PCB board
DRC should always be done when manually adjusting because sometimes some lines break. Each wiring layer can be printed out separately to facilitate rewiring.
Impedance matching in high speed PCB design
Characteristic impedance is related to PCB wire layer, PCB material (dielectric constant), wire width, distance between wire and plane and other factors, and has nothing to do with wire length.
The FPC connector is used to connect the LCD screen to the driver circuit (PCB)
The PCB should be inserted into the chassis. Do not install the PCB in the open position or inside joints.
The common preventive measures against ESD in PCB board design are analyzed
ESD sensitive circuits should be placed near the center of the circuit, so that other circuits can provide some shielding for them.
PCB has advantages and disadvantages of lead spray tin and lead-free spray tin
PCB waste water is divided into cleaning waste water, ink waste water, complexing waste water, concentrated acid waste water, concentrated alkali waste water.
What is the relationship between SMD, SMT and BOM in PCB SMT patch processing?
Package of integrated circuits in which the input and output points are tin balls arranged in a grid pattern on the underside of the component.
Talk about the basic principles of PCB layering design
The power circuit and control signal circuit components need to be connected to different ground layers, which are generally connected through a single point.
Five methods to improve the quality of PCB circuit boards for vehicles are recommended
Attention should be paid to the wiring of signal lines under magnetic beads, between pads and those that may come into contact with magnetic beads. Some magnetic beads conduct electricity quite well and may produce unexpected conductive paths.
Use multilayer PCBS where possible
Adjacent to these connection points, a pad or mounting hole for mounting is placed between the case ground and the circuit ground. These ground connections can be cut open with a blade to keep the circuit open, or a jump with a magnetic bead/high frequenc
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