Of cource BrianGt has done excellent work in his LM4780 project and his opinion is important.
On the other hand it is difficult to ignore Upupa's suggestions.
Upupa prefers a double star (if i can call it that) ground a signal star and a power star with its center between the two big capacitors.
On the other hand it is difficult to ignore Upupa's suggestions.
Upupa prefers a double star (if i can call it that) ground a signal star and a power star with its center between the two big capacitors.
Upupa Epops said:To bill : Second version is still better . To Brian : Your version is way to unstability ( by output current are " modulated " input circuity - you must imagine, that ground line haven't zero resistance ).
I see what you are referring to, and I agree that the input ground path should go from the more central point. Is this better?
--
Brian
Attachments
http://www.cadsoftusa.com/
Google, use words like "eagle, pcb, cad"
http://www.google.se/search?hl=sv&q=eagle+pcb+cad&btnG=Google-sökning&meta=
Google, use words like "eagle, pcb, cad"
http://www.google.se/search?hl=sv&q=eagle+pcb+cad&btnG=Google-sökning&meta=
EAGLE Light Edition (freeware) limitations:
* The useable board area is limited to 100 x 80 mm (4 x 3.2 inches).
* Only two signal layers can be used (Top and Bottom).
* The schematic editor can only create one sheet.
http://www.cadsoftusa.com/
* The useable board area is limited to 100 x 80 mm (4 x 3.2 inches).
* Only two signal layers can be used (Top and Bottom).
* The schematic editor can only create one sheet.
http://www.cadsoftusa.com/
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