We've covered in a digital electronics class the floating gate mos used to construct EPROMs.
I have searched in the circuitikz documentation but I've found no way of drawing it.

I am pretty new to tikz in general, I don't really know how to create it.
In class we have used the following symbol, but I don't really care if an equivalent symbol is used.

[![FGmos](https://i.stack.imgur.com/DzQUa.png)](https://i.stack.imgur.com/DzQUa.png)

Could you please help me drawing it?
Thanks in advance for any help!