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Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

Preamp - ground plane and returning current
Preamp - ground plane and returning current
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Old 4th August 2020, 01:59 PM   #11
ggerla is offline ggerla  Italy
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Quote:
Originally Posted by analog_sa View Post
Lesion spells with one "s". Otherwise, you're spot on
I created a new word... in the middle between lesson and lesion... mistery of mind...
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Old 4th August 2020, 06:24 PM   #12
ggerla is offline ggerla  Italy
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Originally Posted by rayma View Post
I think the overall functional block placement on this board will be ok. Leave all the parts where they are for now.

For a start, remove all the traces from the audio circuits, and then try to route their power supply +/- connections
on the component side in the most direct manner. Then when you next add the audio circuit traces on the component side,
you can use some of the resistors as jumpers if that would be useful.

Don't forget you can swap op amps within a package if that would be more convenient. Where necessary,
the breaks in the ground plane for some of the audio circuit connections that must be on the bottom side
will be small, since these traces will be much shorter than the long power supply traces.
So I moved some component to have space for power rails.
As you can see I reduced the number of wires on the bottom layer and only in few case they are under signal wires.
Do you think that I'm on the right way?
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Old 4th August 2020, 07:12 PM   #13
rayma is offline rayma  United States
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This is certainly better, and when to stop is your call. What is essentially a single-sided board
will always be challenging, for so many components.

Last edited by rayma; 4th August 2020 at 07:17 PM.
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Old 4th August 2020, 09:30 PM   #14
ggerla is offline ggerla  Italy
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I also improved all connections on the top to avoid to use bottom layer.
Some wires more long but that are just for mute...
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Old 5th August 2020, 05:50 PM   #15
Nico Ras is offline Nico Ras  South Africa
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Quote:
Originally Posted by analog_sa View Post
Lesion spells with one "s". Otherwise, you're spot on
OOPS! He was offended and insulted. Guess you cannot beat them all. He probably assumed, that I meant not take note from others. Guess a lot to learn.

HEY BUDDY, I AM TERRIBLY SORRY FOR MY COMMENT DOUBLE POSTED AND ALL!
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Old 5th August 2020, 05:54 PM   #16
rayma is offline rayma  United States
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Quote:
Originally Posted by ggerla View Post
I also improved all connections on the top to avoid to use bottom layer.
Some wires more long but that are just for mute...
Think you're getting the hang of it. Be sure to run a design check. Manual routing is best for audio,
but verify all the net connections.

Last edited by rayma; 5th August 2020 at 06:08 PM.
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Old 5th August 2020, 08:21 PM   #17
ggerla is offline ggerla  Italy
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Yes, of course.
I configured design rules and the clearance is 0.152mm.
Why are you asking me?
I think due to the attached image... right?
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Old 6th August 2020, 12:03 PM   #18
Nico Ras is offline Nico Ras  South Africa
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Quote:
Originally Posted by rayma View Post
Think you're getting the hang of it. Be sure to run a design check. Manual routing is best for audio,
but verify all the net connections.
Make no mistake moan, ggerla is not ignorant! I made that mistake. All he wanted was an opinion on his ground plane. The auto router obviously has EMI/RFI and every thing else under control.
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Last edited by Nico Ras; 6th August 2020 at 12:06 PM.
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Old 6th August 2020, 01:23 PM   #19
ggerla is offline ggerla  Italy
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Originally Posted by rayma View Post
Think you're getting the hang of it.
And finally, after a lot of rework, I routed all signal wires on top layer without ground plane breaks under them.
There are only 4 short wires on the bottom layer and all are under power rails.
Wdyt?
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Old 6th August 2020, 02:56 PM   #20
ggerla is offline ggerla  Italy
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I think that after this I can stop...
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