1. Home About Us Products Equipment Technology Quality Quotes News
Hots: PCB Manufacture | PCBA Manufacture | PCB Printed Circuit Board | Rigid Board |
>> News >> News
Products Category
PCB
Printed circuit board manufacturability - Ground Design
HDI Board
RayMing PCB - www.raypcb.com
AIuminum Board
PCBA Printed circuit board manufacturability - Ground Design
At present electronic equipment and systems for all types of electronic equipment continue to be the main printed
Contact Us
circuit board assembly methods. Practice has proved that, even if the circuit schematic design is correct, properly
Tel: 0086-0755-27348087
printed circuit board design, the reliability of electronic equipment will also adversely affected. For example, if the
Fax: 0086-0755-27348087
boards of two thin parallel lines are very close, it will delay the formation of the signal waveform, the formation of
E-mail: Sales@raypcb.com
the transmission line terminal reflection noise. Therefore, in the design of printed circuit board, they should note that
MSN: Raypcb@hotmail.com
with the right approach.
PDFmyURL.com

2. with the right approach.
Skype: Raypcb
Ground Design
Equipment
In electronic devices, grounding is an important method to control interference. If proper grounding and shielding
can be used in combination, can solve most of the interference problem. General structure of electronic equipment in
a systematic ground, chassis ground (shield ground), digital ground (logic ground) and analog land. The design of the
ground should note the following:
1. Correct choice of single and multi-point grounding grounding
In the low-frequency circuit, the signal frequency is less than 1MHz, its inductance between the wiring and
devices less affected, while the grounding circuit loop formed by a greater impact on the interference and thus point
PTH pre-scrubbing machine
grounding should be used. When the signal frequency is greater than 10MHz, the ground impedance becomes large,
and you should try to reduce the ground impedance should be used more ground nearby. When the operating
frequency 1 ~ 10MHz, if using a little ground, the ground wire length should not exceed the wavelength of 1 / 20, or
multi-point grounding should be used.
2. The separation of digital circuits and analog circuits
Both high-speed logic circuit board, another linear circuit, should make them separate as far as possible, while the
ground do not mix the two were connected with the supply-side ground. Linear circuit to try to increase the ground
area.
3. As bold ground
If the ground is very small, ground potential is with the current changes, resulting in electronic equipment, the
timing signal level instability, anti-noise performance deterioration. Therefore, as grounding wire should be bold, to
make it through three in the printed circuit board to allow current. If possible, ground line width should be greater
than 3mm.
4. Will constitute a closed loop grounding wire
Design of digital circuits consisting only of the printed circuit board ground system, the ground wire made of
closed loop can significantly improve the resistance to noise. The reason is: a lot of printed circuit board integrated
circuit components, especially in case of power when the number of components, due to the thickness of ground
constraints, will end on the ground have a greater potential difference, caused by decreased resistance to noise that
if ground structure into a loop, it will reduce the potential difference and improve the noise immunity of electronic
equipment
PDFmyURL.com

3. RayMing PCB - www.raypcb.com
Related Content Related Content
PCB PCB
About Us
About Us HDI Board
HDI Board AIuminum Board
AIuminum Board
About us | Contact us | Certificate | SiteMap |
Copyright Rayming all Rights Reserved.
PDFmyURL.com