What is shielding and which signal types need it?

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amitabh262002

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what is shielding and which types of signals need this???????????
 

Re: Shielding

shielding is a layout technique to protect sensitive signal lines from cross talk. The line is usually wired with two parallel lines and these lines are normall connected to lower potential.
 

Re: Shielding

shielding is used to preventing the corruption of our signal of interest.... signals with low noise immunity are to be shielded.....
 

Shielding

Critical signal need shielding for the following:

1. Electronic field interference 2. Crosstalk interference 3. Noise disturbance
 

Re: Shielding

One of the situations where shielding is required is when say in M1, the bias lines are connected and you have a clock signal crossing the line in M3. Then the usual practice is to draw a M2 layer around the overlapping area and ground it. By this, the switching noise from the clocks are shorted to ground and the bias lines are 'shielded' from the noise/crosstalk...

hope this helps...
 

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