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Registered Member #2694
Joined: Mon Feb 22 2010, 11:52PM
Location: Russia, Volgograd (Stalingrad).
Posts: 97
Hi, guys. Need your help. Who knows autorouter with good autoplacement, that will analyse first a shortest signal route's path between all parts? I know diptrace, but it just put parts in square form and after that make a holy bunch of looong routes.
Registered Member #2939
Joined: Fri Jun 25 2010, 04:25AM
Location:
Posts: 615
I have yet to find an autorouter that I liked - they all seem to make a huge mess. Proper placement and routing requires understanding of the circuit and how it functions - it is not just a 'join the dots' process.
Registered Member #72
Joined: Thu Feb 09 2006, 08:29AM
Location: UK St. Albans
Posts: 1659
The important thing is that in some designs, connecting wires are components, and in some they aren't. An autorouter can only infer wires, not components.
In an RF circuit, low noise audio, or medium or high speed logic, long wires are inductors, shared grounds are mutual coupling points, parallel tracks are capacitors or transformers. There's no way an autorouter can do the sensible things with those.
Registered Member #5258
Joined: Sun Jun 10 2012, 10:15PM
Location: Missouri - USA
Posts: 119
Another vote for not using an auto-router, no good will come of it. The closest thing to auto-routing that is worth anything is a "follow me" function that routes and inserts vias, etc on it's own as you trace out the path for it to follow.
If you must use an auto-router (laziness, not caring about signal layout, etc) at least set up classes if your program supports them. This allows you to define parameters for each signal class such as clearance and trace width to name a few.
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Autorouter advise
