1. Four quadrants MOSFET graph
Low loss ideal diode circuits use MOSFETs in opposite direction to create the ideal diode. Here we must know that, in contrast to bipolar transistors, MOSFETs conduct in two directions. Nevertheless it is weird that only one quadrant is shown at the manufacturers MOSFET characteristic curves. I haven’t found four quadrants MOSFET graphs, so I have done measurements and created such a chart myself. Note that in the reverse direction the body diode is active.
Here is a 4 quadrants graph of an IRFP140 MOSFET. The range is limited, it is only for showing the behaviour in the reverse direction.
Here is a 1 quadrant MOSFET graph from the manufacturer.
2. Ideal diode circuit example
There are many components available to create ideal diodes. To find applications Google “ideal diodes ic”.