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Cars > tingyuya’s Garage > Blog > Personalized printing circuit board ground connection design need to pay attention to four basic common sense

 

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Personalized printing circuit board ground connection design need to pay attention to four basic common sense

By tingyuya

??Personalized printing circuit board ground connection design need to pay attention to four basic common sense
??custom pcb manufacturer ?In the electronic products, the ground is one of the important ways to control interference. If the grounding and shielding the right combination, can solve most interference, grounding in electronic equipment structure is systematically, casing, analog ground and digital ground. Should pay attention to in the design of the time, some:
1 in low frequency circuits, frequency signal is less than 1MHz, the influence of inductance smaller wiring and device it between the grounding circuit, and the formation of the circulation on the interference influence, the one point grounding. When the signal frequency is more than 1MHz, ground impedance becomes very large, at this time should be as far as possible to reduce the low ground impedance, should use the nearest multipoint earthing. When the working frequency is 1 ~ 10MHz, if the use of one point grounding, the grounding wire length should not be more than 1/20 wavelength, or should be used multi-point grounding.
circuit board manufacturing companies http://www.ib...ring-Services
??2 digital and analog circuit to separate circuit board both high speed logic circuit, and a linear circuit, should make them apart, both of the ground don't mix, respectively connected to ground and power supply. To increase the grounding area to linear circuit.
??3 to bold ground if the ground is very fine, the ground potential is varied with the variation of current timing signal level, the electronic device instability, bad anti-noise performance. Therefore shall the earth as bold, make it through three located in the allowable current printed circuit board. If possible, grounding wire width should be greater than 3mm.
??4 the grounding wire form a closed loop design consists only of digital circuit printed circuit board of the grounding system, the grounding wire into a closed loop can significantly improve the anti-noise ability. The reason is that there are a lot of integrated circuit components: printed circuit board, especially in case of power consumption component, due to grounding wire thickness limit, will have a greater potential difference in the node, decrease the noise resisting ability, if the ground structure into a loop, it will narrow the potential difference, increase the electron equipment ability to resist noise.
This article from: ibuonline circuit board manufacturing companies, cheap pcb manufacture, All Rights Reserved

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Cars > tingyuya’s Garage > Blog > Personalized printing circuit board ground connection design need to pay attention to four basic common sense

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