PCB routing methods, techniques , experience sharing
PCB layout design ( a )
PCB layout design ( a ) In today's highly competitive market for battery-powered , since the cost index restrictions , designers often use double-sided . Although multilayer ( layer 4 , 6 and 8-layer layer ) scheme has obvious advantages in size, noise and performance, cost pressure is prompting engineers to rethink their routing strategy , using double-sided . In this article, we will discuss the proper use and misuse of automatic routing capabilities , and without a ground plane current loop design strategies , as well as recommendations for dual-panel component layout. Advantages and disadvantages of automatic routing and analog circuit design layout considerations PCB, often want to use the automatic routing. Typically , pure digital circuit board ( in particular, a relatively low signal level , the circuit density is relatively small ) by an automatic wiring is not a problem . However , in the design of analog, mixed- signal or high-speed circuit board , if the use of automatic routing software routing tool , there may be some problems , and possibly even lead to serious circuit performance issues. For example, Figure 1 shows the top of an automatic double-sided wiring design . Underlying this dual panel shown in Figure 2 , the circuit schematic of the wiring layers shown in Figure 3a and Figure 3b.
This mixed-signal circuit design board, after careful consideration , the device is placed on the board by hand , in order to......
Experience in PCB wiring _ download
