To provide you with effective skills to improve PCB design spread rate and design efficiency: 1, determine the number of PCB layers, 2, design rules and restrictions, 3, component layout, 4, fan out design, 5, manual wiring and key signal processing, 6, a
In high-speed logic and circuit design, for some key signals, such as clock, control signals, to add the source end matching resistance, so that the signal will be reflected back from the load end, because the source impedance matching, the reflected sign
PCB design engineers need to master a wide range of knowledge system, including electrical theory, component performance, digital circuit and analog circuit, PCBA processing process and DFM manufacturability theory, schematic drawing and Layout.
Drawing pads with filler blocks can pass DRC inspection when designing lines, but it is not feasible for machining. Therefore, similar pads cannot directly generate solder resistance data.
PCBA refers to a machining process, and the process on PCB board has been completed before it is calculated as PCBA. PCB refers to a blank printed circuit board without any parts, that is, PCBA is a finished board, PCB is a bare board.
A large area of the power layer can make wiring easy, but this structure often leads to deterioration of system performance. Connecting all the power leads together on a large plane cannot avoid noise transmission between pins.
pad according to pad, this is the plug-in hole, via you have two choices, if you provide the original file, you can choose when placing the order, if you provide the gerber file, please check whether the gerber file meets your requirements!
All switching power supplies on the circuit board have the same components and similar current path sensitivity.
Key signals such as analog small signal, high-speed signal, clock signal and synchronization signal are routed first, and the devices with the most complex connection relationship on the board are routed first.
The fact that there are few restrictions on where components can be placed and no "infallible" rules doesn't mean you can do whatever you want.
In any switching power supply design, the physical design of the PCB board is the last link. If the design method is not correct, the PCB may radiate excessive electromagnetic interference, causing the power supply to work unstable.
The preliminary preparation contains the preparatory component library and schematic diagram. Before PCB planning, the schematic SCH component library and PCB component packaging library should be prepared first.
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