Why should I design 4 layer PCB

[Guillermo Parada M]

Hello all:

Why should I design a PCB for a low speed embedded system using more than
two layers, ei four layers.

There are reasons for design a four layer PCB in a low speed embedded
systems?


Thanks.

 

[Guy Macon]

Guillermo Parada M <gapm@vtr.net> says...

Why should I design a PCB for a low speed embedded system using more than
two layers, ei four layers.

There are reasons for design a four layer PCB in a low speed embedded
systems?

Low level signals that need a quiet ground.

Can't route it with only two layers.

Need to reduce EMI.


--
Guy Macon, Electronics Engineer & Project Manager for hire.
Remember Doc Brown from the _Back to the Future_ movies? Do you
have an "impossible" engineering project that only someone like
Doc Brown can solve? My resume is at http://www.guymacon.com/

 

[CBarn24050]

Why should I design a PCB for a low speed embedded system using more than
two layers, ei four layers.

High density surface mount means you often run out of space if you only have 2
layers. If you keep to dips and spread them out you can often get away with 1
layer.