Talk Something about Impedance PCB
Considerable signal reflection and falsification will occur, thus resulting in design failures if there is no impedance control in the PCB. Normal signals, such as PCI bus, pci-e bus, USB, Ethernet, DDR memory, LVDS signal, etc. also require impedance control. Finally, PCB design will be achieved by impedance control and it can put forward for PCB technology. After talking with PCB manufacturers and combining with the use of EDA software, the trace with impedance control can be made according to the integrity of signal. Different routing methods can be calculated to obtain the corresponding impedance. Microstrip line It is composed of a ribbon conductor and ground plane, with dielectric in the middle. If the dielectric constant of the dielectric, the width of the line, and the distance to the ground plane are controllable, the characteristic impedance of the dielectric is also controllable, and the accuracy is less than + / -5%. Stripline A strip is a strip of copper between tw...