About jinkang

jinkang · 2012-09-18

Posted on September 18, 2012 at 17:34Hi thereI am using the Ethernet Transceiver ST802RT1A to make my own PCB board following the design of STEVAL-PCC012V1 (http://www.st.com/internet/evalboard/product/250577.jsp) except one thing - I changed the ma...

jinkang · 2012-09-21

Posted on September 21, 2012 at 12:16It could be the impedance matching problem. But now the problem is the transformers and jacks with ratio 1.414:1 recommended by STM in UM0819 User Manual are not available on the market, not even from Digikey, Mo...

jinkang · 2012-09-19

Posted on September 20, 2012 at 00:37Ok, I will try to use the original one, at least one with the same turn ratio. But I am wondering what is the direct effect of choosing a different turn ratio?? Is that a change of the voltage and current, so tha...

jinkang · 2012-09-18

Posted on September 18, 2012 at 18:32One thing to correct, the magnetic jack I use has a turn ratio of 1CT:1. Any clue of this problem??

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Output voltage problem with ST802RT1A

Re: Output voltage problem with ST802RT1A

Re: Output voltage problem with ST802RT1A

Re: Output voltage problem with ST802RT1A