On the one hand, by controlling the high level voltage applied in the grid *, there is a channel between the source and drain, and the electrons flow from the source to the drain through the channel, and the direction of the current is from the drain to t
The lines form "copper roots" on both sides after etching, and the copper roots narrow the line spacing, resulting in printed circuit boards that do not meet the requirements of Party A, and may even be rejected.
prepare the component library of schematic SCH and the component library of PCB. Component library can use protel (many electronic veteran birds have protel at that time
PCB board is printed with solder paste, installed with electronic components, and then fixed by reflow welding.
Fanyi PCB design Company to military quality PCB design requirement PCB design can not be arbitrary, there are certain rules. Fanyi circuit military quality PCB design has the following requirements
The Bonding line, C4 bump and solder ball connect the chip, package and PCB together. The whole power supply system should ensure that each integrated circuit device provides stable voltage within the normal range.
Another technique is to lay a ground wire between the two lines. The ground wire is low impedance, and adding such another wire will weaken the electric field that causes the interference!
The parallel computer technology of multi-CPU improves the computing speed of the system to a great extent, breaking through the limit of the processing speed of single CPU.
The voltage at different points of the same wire may be different, especially when the current is high.
The crystal oscillator, as we often say, is the quartz crystal oscillator and the quartz crystal resonator.
In order to facilitate production, PCB circuit board plate generally needs to design Mark point, V groove, process edge.
Generally speaking, many engineers pay more attention to forward crosstalk, but this is the wrong thinking.
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