Impedance Control of PCB: As circuit design becomes increa singly complex and high-speed, how to ensure the integrity of various signals (especially high-speed signals), that is, to ensure signal quality, has becomes a problem. At this point, will take advantage of transmission line theory to...
Dongguan Pinsheng Electronics Co.,Ltd was established in 1993 , which was a UL, ISO9001 and ISO/TS16949 certificated company with 24 years experience in PCB manufacturing.
Through stable cooperation with domestic and oversea customers, PS has grown to a group with 3 department for production of rigid, flex and quick turn delivery department. Our products are widely used in consumer products, communication, industrial control, automotive, computers and lighting etc..
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Impedance Control of PCB
As circuit design becomes increasingly complex and high-speed, how to ensure the integrity of various signals (especially high-speed signals), that is, to ensure signal quality, has becomes a problem.
At this point, will take advantage of transmission line theory to analyze. Control signal characteristic impedance matching becomes the key point. Non-strict impedance control will cause considerable signal reflections and signal distortions, leading to design failures.
Common signals such as PCI bus, PCI-E bus, USB, Ethernet, DDR memory, LVDS signals, etc., all require impedance control. Impedance control ultimately needs to be realized through PCB design, and higher requirements for PCB board technology.
To make sure the quality of signal in complex design, we need to control the resistance and reactance of an electrical circuit.
The impedance of a PCB is largely determined by the following parameters:
• Distance of signal layer and potential
• Conductor geometry
• Copper thickness
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