[sdiy] Eurorack Grounding Question

[Vladimir Pantelic]

and here is another link:

http://site.ieee.org/phoenix-emcs/files/2015/06/PCB-Design-link.pdf


On 2020-12-31 11:48, Ben Stuyts wrote:
> Here are a couple of good app notes if you want to read up on it:
> 
> Grounding in mixed-signal systems demystified pt 1 & 2:
> https://www.ti.com/lit/an/slyt499/slyt499.pdf
> https://www.ti.com/lit/an/slyt512/slyt512.pdf
> 
> PCB Design Guidelines For Reduced EMI:
> https://www.ti.com/lit/an/szza009/szza009.pdf
> 
> Ben
> 
> 
>> On 31 Dec 2020, at 09:01, Steven Cook via Synth-diy <synth-diy at synth-diy.org 
>> <mailto:synth-diy at synth-diy.org>> wrote:
>>
>> Thank you for these answers. I think I'll go with Tony's recommendation. The 
>> reason I have input jacks connected to the digital ground is simply that they 
>> are connected to the microcontroller (via transistors and reverse voltage 
>> protection diodes), so I assumed that the jacks should be also - I'll change that.
>>
>> I have a couple of follow-up questions:
>>
>> 1. If I have a ground fill on the PCBs, which ground should it be connected to?
>>
>> 2. Which ground should the DAC be connected to?
>>
>> ------ Original Message ------
>> From: "Steven Cook via Synth-diy" <synth-diy at synth-diy.org 
>> <mailto:synth-diy at synth-diy.org>>
>> To: Synth-diy at synth-diy.org <mailto:Synth-diy at synth-diy.org>
>> Sent: 29/12/2020 09:30:46
>> Subject: [sdiy] Eurorack Grounding Question
>>
>>> Hi, I'm designing a Eurorack module which uses a microcontroller. The PCB has 
>>> separate analogue and digital grounds joined at the power input header, but 
>>> I've realised since designing it that both grounds will also be shorted 
>>> together by the front panel as there are input jacks connected to the digital 
>>> ground and output jacks connected to the analogue ground. I assume this would 
>>> create an ground loop. Would I be better off not bothering with separate grounds?
>>>
>>> Regards,
>>>
>>> Steven Cook
>>>
>>>
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>>
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