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MOSFET Transistor Modes

Started by buckysde, November 02, 2010, 06:25:10 PM

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buckysde

What is an "Enhanced Mode" transistor and how does it differ from a non-Enhanced Mode one?

What difference could it have in a circuit?

stecykmi

it's usually called enhancement-mode. it deals with the physical fabrication of the device. most mosfets we deal with (bs170, 2n7000, etc) are enhancement-mode. i as far as i know, they're more common in industry as well. i never really seen depletion-mode devices, the compliment to enhancement-mode, in my studies.

the difference has to do with the switching voltage of the gate, as i understand it. i think the gate has to be brought high to cut off the channel.

i don't know how it would sound in a circuit, but they're not drop-in replacements for enhancement-mode devices. you'd have to design a circuits specifically for them.