I have been looking for a solution to "disconnect" an ethernet cable from a port without physically disconnecting it.
I'm doing this since I want to reduce power consumption in a project I'm working on which includes an FPGA with an ethernet port. Physically disconnecting the ethernet cable is the only way of turning of the ethernet port on the FPGA, which consumes a pretty large amount of power.
I haven't found anyone doing something similar when looking for an answer. I might have a solution and were just wondering if it's viable or if someone has a better one.
What is the drawback of simply letting the ethernet cable going through a transistor? If the switch activity is low, the parasitics of the MOSFET shouldn't be a problem, or am I wrong here?