inversion layer

May be wrong group. There doesn't appear to be a sci.weather group, so you may want

Effect on what?

Richard

It is a layer of air that is either warmer or colder than the layers above and below it. It will bend the radio waves. Also in the ocean water it is a layer of water that is warmer or colder than the water above and below it. The sonar used to search for submarines will bend and give a false indication of where the sub is if it even bounces off of it.

hot air trapped below cold air

cold wind aproaching hot ground flowing over the top of hills for example.

I think that's when air flows faster past an obstacle, but I'm not sure.

i'm sorry i was talking about FET's not weather....

Are you talking about the PN junction depletion region? If so, look here:

Well...yeah...

:-p

Tim

-- Deep Fryer: a very philosophical monk. Website:

Yes. Indeed you were. Quite frankly, I am somewhat amused at the responses to this question in this group.

Oh...The "body effect" is noted by the change in threshold voltage that occurs when the backgate/substrate connection of the mos is connected to a lower potential then its source (nmos case).

If the mos is an isolated structure, one can tie its local tank/well to its source. This minimises its Vt. If the structure is a non-isolated one, then this cant be done. In this case the effective Vt will be higher if the source is not at the substrate potential, e.g. in a nmos differential pair. Isolated mos use more area, so its a trade off as to how one designs the circuit. A higher Vt usually can result in less signal handling range.

The weather over here (London) is a bit drizzly and cold today though.

Kevin Aylward snipped-for-privacy@anasoft.co.uk