Mosfet Definition and 215 Threads

I was making a model of a NMOS transistor in Microcap. It was part of an assignment. I was supposed to make graph with changing value of V_{BS}. But after a certain value of V_{BS}, I got negative current. It came to my mind it is not possible. But, I couldn't think of a reason instantly, as to...

Hi I am trying to figure out how to determine the size of the resistors I need to put in line of the gate wire to turn on and off the mosfet in a circuit for an airsoft gun I have several mosfets laying around the 1 I want to use is a 50a 100v that said what size resistors do I need to put in...

is there a place where i could get a 2SJ295 power mosfet spice model? any recommendations would be greatly appreciated. thanks.

I would appreciate any reference or book recommendations you all may have as to how to convert a datasheet to a spice model, specifically Mosfets Thanks EF

Hello All, I was playing around with a small circuit that used a MOSFET to pulse power from my DC power supply into a small coil that I wound (I was messing around with BEMF in the coil). I was driving it with a small function generator, connecting the function gen's output directly to the gate...

Hi, I've been hearing people talk about using solid state switches/relays as replacements for relays on boards and I was wondering if someone could explain to me the difference between a solid state relay and something like a MOSFET or transistor. Why not just use one of those? Thanks, Jason O

What is the role of the oxide in MOSFETs?

I am having an issue with choosing an appropriate MOSFET (N-chan) for my purposes. I intend to use 5V logic to turn on/off a circuit which has roughly 4A flowing through the drain-source when on. However, I am having trouble figuring out how to find the properly-rated MOSFET to do this. The...

I'm doing logic gates using their basic components MOSFETs. I have no idea how to understand which is the source and drain of the transistor from a symbol diagram when given both the n type and the p type. I also cannot understand what happens when the source is connected to ground. Can someone...

What are the implications of connecting the bulk of a p-channel mosfet to a +Vdd. Up until now, we've only had examples where the bulk has been shorted to the source of the mosfet, or shorted to ground. I don't know how a bulk voltage changes the source voltage or the drain voltage. Thanks...

What does the arrow in the symbol of the MOSFET indicate? I skipped the lecture when we were told this :smile: and I can't figure out myself. I mean if it were after me, I would have put that arrow to indicate the direction of the electric field, but the arrow actually points the oposite way. So...

Hi, I'm new here. can somebody put here an a schematic of Class AB, D,G or T. I need an audio amplifier that work with bjt and mosfet simultaneously, i think that kind of amplifier is class g, but I'm not sure,for example i saw an 5000w amplifier with 2sc5200 and his pnp pair working with...

Hey guys and girls, Just letting you know some of the work that a few people here at IMEC have been working on. This really is a serious enhancement towards the development of organic transistors. Basically, what happens is the replacement of the metal/poly-silicon gate in a MOSFET by an...

Hi, I know how to bias a BJT transistor to operate in the active region, so that the amplifier circuit can operate as a small-signal amplifier. Two methods (i) Use biasing resistors to form a self-biasing circuit. (ii) Use diode biasing, coupled with biasing resistors. Qn1 However, how...

Hi Guys! well! i have designed a mosfet amplifier. This amplifier uses only MOSFET in its operation along with an input signal and capactors and resistors and VDD. I want to ask u one thing. The amplifier which i have designed takes 0.1V of AC signal as an input and provides a gain of...