found a short circuit phenomenon. Take a board to cut the line (especially suitable for single/double board), after cutting the line, each part of the function block is powered separately, and gradually eliminated.
In principle, right-angle wiring will cause the line width of the transmission line to change, resulting in impedance discontinuity. In fact, not only right Angle wiring, ton Angle, acute Angle wiring may cause impedance changes.
In circuit board design, we are usually very concerned about the quality of the signal, but sometimes we usually limit the research on the signal line, and the power and ground as the ambition of the situation to deal with, although this can make the ques
For those devices that are easy to produce noise, small current circuits, large current circuit switching circuits, etc., should try to keep it away from the logic control circuit and storage circuit (ROM, RAM) of the single chip computer, if possible, th
What is the circuit and load impedance? Whether there is space to place magnetic beads on the PCB board. The first three can be judged by observing the impedance frequency curve provided by the manufacturer.
Through the above analysis of the parasitic characteristics of the hole, we can see that in high-speed PCB design, seemingly simple holes often bring great negative effects to the design of the circuit.
Each PCB board is basically composed of the aperture hole layer, DRILL layer, line layer, solder mask layer, character layer, in the CAM350, each load layer will be separated by a different color, so that we can operate.
Add a blank signal layer near the center of the PCB stack. This approach minimizes layering unbalance and improves PCB quality. First, the odd-numbered layer is routed, and then a blank signal layer is added to mark the remaining layers.
PCB production process is more complex, it involves a wide range of processes, from simple machining to complex machining, there are ordinary chemical reactions and photochemical electrochemical thermochemistry and other processes, computer-aided design C
To sum up, to choose an excellent PCB design company, you need to consider the strength of the company, customer reputation, service quality and price, after-sales service and other aspects. In the selection, you can according to their actual needs and bu
The tip of the solder joint may also be related to the poor connection between the leading end of the Component and the PCB pad. If the connection is poor, it will lead to the internal solder joint is not tight enough, and when the solder joint experience
The layout and welding method are also one of the key factors to prevent the bending and warping of PCBA plate after passing through the welding furnace. For example, in a complex assembly process, welding must begin at both ends of the PCB to control the
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