Help with circuit components

Thread Starter

Ali250

Joined Aug 6, 2014
1
I'm trying to interface an RJ-45 connector with a standalone ENC28J60 ethernet controller IC and the manufacturer provided the attached circuit diagram in the datasheet.

I've encircled the bits I need some help with. Firstly the symbol at the bottom is something I've never seen before. I'm guessing it's something similar to a ground but I'm not quite sure? Secondly what's the use of the 1:1 current transformers? Can I simply omit them since they aren't altering the current or voltage in anyway? Or are they a safety precaution to physically isolate the RJ-45 connector from the ethernet controller?

Thanks in advance.
 

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Lyncheese

Joined Jun 28, 2014
22
In my opinion, your guess is right.

I thought the same way.
The second ground symbol is different from another to show that it's the RJ-45 ground, not the main circuit ground.

The CT transformer simply just to make the insulation. And maybe to reduce the EMI/noise at the same time.

By the way, It's just my personal opinion. CMIIW.

Warm regards.
 
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