Unknown (to me) symbol

ClydeCrashKop said:

Does he use pipe tees and other plumbing fixtures to make connections in the rest of that schematic?

Click to expand...

Yes!
He only has the fluid control parts library for AutoCad!
The only device that jives is the Diode/Check-valve!
And it is backwards for electronic circuits!

Buk said:

Yes. The same symbol is used in a whole bunch of different circuit (pseudo) schematics that I'm looking at; hence I didn't want to post a complete circuit as I don't want the discussion to be about any particular circuit.

I think the only interpretation is "a generic mosfet suitable for your specs for a circuit of this type".

Which is fair enough, but as I'd never seen half of the variations of mosfet symbols (enhanced bulk ujt etc.), I thought it worth asking just in case it was some obscure, but clearly defined animal.

Click to expand...

the silicon must be doped with unobtainium...

unclejed613 said:

the silicon must be doped with unobtainium...

Click to expand...

Wow. You found a datasheet.

Buk said:

Wow. You found a datasheet.

Click to expand...

nice website for smps

Buk said:

Wow. You found a datasheet.

Click to expand...

In that webpage, the symbol is just being used to represent a generic MOSFET. It's not suppose to represent a particular device. The circuits don't show anything connected to the gate, because that webpage is about the high-current parts of each converter, and the maths around that.

The circuits are not finished designs, they are just an indication of the topology of several types of converter.

Circuit diagrams omit detail in order to make the principle understandable. For instance, a circuit diagram will rarely show which wires have to take higher current, and if all the design details are added to a circuit diagram it will often become difficult to understand.

I think it is a good choice of symbol as it doesn't imply N or P type, and leaves the circuit diagram clearer for better understanding of the topologies.

Diver300 said:

In that webpage, the symbol is just being used to represent a generic MOSFET.

Click to expand...

Indeed. That's the same conclusion I drew:

Buk said:

I think the only interpretation is "a generic mosfet suitable for your specs for a circuit of this type".

Click to expand...

But I posted because I wanted to be sure that I wasn't missing something.

Diver300 said:

I think it is a good choice of symbol as it doesn't imply N or P type, and leaves the circuit diagram clearer for better understanding of the topologies.

Click to expand...

Agreed.

MacIntoshCZ said:

nice website for smps

Click to expand...

Very useful. If only I could make a simulation of the circuit work.

Diver300 said:

I think it is a good choice of symbol as it doesn't imply N or P type, and leaves the circuit diagram clearer for better understanding of the topologies.

Click to expand...

a lot of explanations of SMPS theory simply use SPST switches in place of the transistor.