Where can I find a basic block diagram with descriptions for a typical 10/100BASE-T PHY output driver stage?
I also wonder whether all drivers use "current-mode" outputs that lead to voltage across the external termination resistors (it seems so, because most of the time I see applications with termination resistors to VDD or GND) or are there devices that use voltage output? Why is current output the better choice? It it easier to steer current sources than voltage sources? (and therefore easier to create the different voltage levels)