qiushidaren wrote on Jun 23rd, 2010, 7:01am:I wonder how does this kind of MOSFET work, which has an unusual gate structure?
This is a very common dual-gate MOSFET.
qiushidaren wrote on Jun 23rd, 2010, 7:01am:Can it be equivalent to any normal MOSFET structure, and what is its purpose by doing so?
It is equivalent to "Cascode Connected MOSFET".