I have been looking over multiple designs for ideal diodes using FET transistors such as the circuits from these posts:

https://electronics.stackexchange.com/questions/290284/pmosfet-ideal-diode-for-24v

https://electronics.stackexchange.com/questions/223935/understanding-an-ideal-diode-made-from-a-p-channel-mosfet-and-pnp-transistors

and from this site: 

http://jiggerjuice.info/electronics/projects/power/ideal-diode.html

The part that I don't understand is why they use so many other components in their designs.  My question is if the following circuit I designed functions the same as the ones linked above. 

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![schematic](https://i.sstatic.net/gxIKk.png)

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The zener diode is being used to protect the gate terminal on the FET.

edit: for use as a high side half wave rectifier:
[![Ideal Diode][1]][1]
 


  [1]: https://i.sstatic.net/pJonl.jpg