From the point of view of function, the hole can be divided into two categories: one is used as an electrical connection between the layers; The second is used for fixing or positioning devices. If from the process, through the hole is generally divided i
This article is a summary of the author's experience in the actual development, hoping to help many RF IC developers shorten the development cycle, avoid unnecessary detours, save manpower and financial resources
where the capacitor in the circuit to AC current obstruction effect is called capacitive reactance, inductance in the circuit to AC current obstruction effect is called inductive reactance, capacitance and inductance in the circuit to AC current caused by
With the success of high-speed PCB design, the contribution to EMI has been paid more and more attention. Almost 60% EMI problems can be controlled and solved by high-speed PCB. I have done EMI design for 4 years, and I have some ideas to communicate with
Nowadays PCB design time is getting shorter, smaller and smaller board space, higher and higher device density, extremely demanding layout rules and large size components make the designer's job more difficult.
layout designers must ensure that their work is fully documented and that the final product is ready to be included in the main electronic system of their design.
manufacturing technology and system complexity and other key factors have many conflicting requirements, PCB board laminated design is generally considered in various aspects of the key factors after a compromise decision. High - speed digital circuits an
Poor insulation of copper wire will lead to arc between copper wire and copper wire. Too close between the copper trace and the path, it is easy to short-circuit risk; The lack of thickness of the circuit board can lead to bending and breaking.
If there are a lot of key signals on the PCB to do impedance, you can attach a separate document, will be impedance control line display, and explain the value and error to do, circuit board factory will adjust the control of these "important signal&...
The other is ground (or low potential) noise, that is, ground noise caused by the potential difference between ground wires in various parts of the system or by the presence of ground impedance.
high speed circuit design technology has become the electronic system designers must take the design means. The controllability of the design process can only be achieved by using the design techniques of high speed circuit designers.
n electronic product that does not conform to EMC specifications is not an acceptable electronic design. In addition to meeting market functional requirements, design products must also adopt appropriate design techniques to prevent or relieve EMI effects
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