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
When designing PCB, how to avoid errors: first, data input stage, second, post-layout inspection stage, third, post-wiring inspection stage
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.
Engineering software and online resources tend to be expensive, but can be very beneficial for professionals, students, and hobbyists.
Through hole is one of the important components of multi-layer PCB. From the perspective of function, through hole can be divided into two categories: one is the electrical connection between each layer; The second is the device fixing or positioning.
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.
PCB is also known as the Printed Circuit Board (Printed Circuit Board), it can realize the circuit connection between electronic components and function realization, is also an important part of the power supply circuit design.
Maintain the integrity of signal transmission and prevent the "ground projectile phenomenon" caused by the division of ground wire.
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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