Anyone knows what kind of transistor is it?

yuxiaojian01 · Jun 25, 2014

Hi all,
do you know what is the name of this transistor? It should be a NMOS transistor, but why is there a small rectangular of the symbol? What is the meaning of it? what is the difference between it and the normal NMOS transistor?
Thank you!

chemelec · Jun 26, 2014

Where did you find this?

Possibly show the Schematic from were it came.

Audioguru · Jun 26, 2014

Google images shows many symbols for Mosfets but none look like that one. I think somebody made it up.

yuxiaojian01 · Jun 26, 2014

chemelec said:
Where did you find this?

Possibly show the Schematic from were it came.

Thank you for your reply. I got it from a paper, it's in the attachment. I think it's a HV Mosfet, but I'm not sure.

Robert Qi · Jun 26, 2014

It should be a HV NMOS. The small rectangular of the symbol just shows the nonsymmetry characteritic of the HV NMOS.

erikl · Jun 26, 2014

yuxiaojian01 said:
View attachment 106678

I think it's the symbol of a lightly doped drain (LDD) HV transistor (feasible both with NMOS & PMOS). The small rectangle depicts the drain.

yuxiaojian01 · Jun 26, 2014

erikl said:
I think it's the symbol of a lightly doped drain (LDD) HV transistor (feasible both with NMOS & PMOS). The small rectangle depicts the drain.

Thank you erikl, that solves the question.

Anyone knows what kind of transistor is it?

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