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Modeling >> Semiconductor Devices >> How does this kind of double gate MOSFET work?
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Message started by qiushidaren on Jun 23^rd, 2010, 7:01am

Title: How does this kind of double gate MOSFET work?
Post by qiushidaren on Jun 23^rd, 2010, 7:01am

Hi gurus,

I wonder how does this kind of MOSFET work, which has an unusual gate structure? Can it be equivalent to any normal MOSFET structure, and what is its purpose by doing so? Thank you in advance.

-Terry

Title: Re: How does this kind of double gate MOSFET work?
Post by pancho_hideboo on Jun 23^rd, 2010, 7:11am

qiushidaren wrote on Jun 23^rd, 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 23^rd, 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".

Title: Re: How does this kind of double gate MOSFET work?
Post by qiushidaren on Jun 23^rd, 2010, 7:48am

Hi pancho_hideboo,

Could you please explain why this structure can be equivalent to cascode transistors, i can't figure it out, thank you.

-Terry

Title: Re: How does this kind of double gate MOSFET work?
Post by pancho_hideboo on Jun 23^rd, 2010, 7:59am

qiushidaren wrote on Jun 23^rd, 2010, 7:48am:

Could you please explain why this structure can be equivalent to cascode transistors,
i can't figure it out.

You can easily understand such things if you read any text book for beginner surely.
http://docs-asia.origin.electrocomponents.com/webdocs/0819/0900766b8081988d.pdf

Simple series connected two MOSFET.

S1-G1-(D1=S2)-G2-D2 --->> S1-G1-G2-D2

Title: Re: How does this kind of double gate MOSFET work?
Post by qiushidaren on Jun 23^rd, 2010, 8:15pm

Sorry, I just misread it yesterday, it is really simply, and thank you for not being bored by this kind of question.

pancho_hideboo wrote on Jun 23^rd, 2010, 7:59am:

qiushidaren wrote on Jun 23^rd, 2010, 7:48am:

Could you please explain why this structure can be equivalent to cascode transistors,
i can't figure it out.

Title: Re: How does this kind of double gate MOSFET work?
Post by pancho_hideboo on Jun 24^th, 2010, 5:44am

qiushidaren wrote on Jun 23^rd, 2010, 8:15pm:

thank you for not being bored　by this kind of question.

Did you think so ?
I was very bored by your question which is always too easy.

Title: Re: How does this kind of double gate MOSFET work?
Post by August West on Jun 24^th, 2010, 11:35am

Pancho,
You are really very rude.

August