Hi guys i had an idea for shielding an lm317 circuit im drawing.
When i try to keep the return path as tight as possible i end up with a bus ground, and with most of the vcc vee traces exposed.
I can turn the bus ground into a plane and cover all the exposed traces but i understand such ground enlargement comes with its own set of tradeoffs.
Or, i can make a seperate plane for the same purpose and tie that directly to the chassis+ earth.
This earth layer does include shielding return path for ei transformers and is coupled with ac traces tho. Would all these added noises be detrimental to what im trying to do? Wouldnt it 'bleed' thru the power traces and make their way into the active circuit?
What if i was to use this shield method for the input trace of 317 and not its output?
When i try to keep the return path as tight as possible i end up with a bus ground, and with most of the vcc vee traces exposed.
I can turn the bus ground into a plane and cover all the exposed traces but i understand such ground enlargement comes with its own set of tradeoffs.
Or, i can make a seperate plane for the same purpose and tie that directly to the chassis+ earth.
This earth layer does include shielding return path for ei transformers and is coupled with ac traces tho. Would all these added noises be detrimental to what im trying to do? Wouldnt it 'bleed' thru the power traces and make their way into the active circuit?
What if i was to use this shield method for the input trace of 317 and not its output?
Last edited by a moderator: