Idss TOSHIBA Field Effect Transistor Silicon N Channel MOS Type?

[merlin el mago]

How to measure Idss TOSHIBA Field Effect Transistor Silicon N Channel MOS Type K982 & J148, attached datasheets.

Using the jig of this link readings measures 0 Idss Transistor matching

TIA
Felipe

 

[merlin el mago]

Forgot to attach the datasheets.😱

 

[Zung]

Wrong jig, it's for JFET's.
A NMOS needs a positive voltage at the gate to conduct, reverse for PMOS. Use this jig instead.

 

[merlin el mago]

Thanks, in the link there are two ways (input & output): attached schematics, used for regulators Q17-18 K982 & Q22-23 J148 and for driver for Borbely power amp Q5-6 J148, wich metod have I to use and what VGS it's best suited?

 

[Zung]

K982 is a N-Channel, left
J148 is a P-Channel, right
The absolute value of Vgs is probably not too important as long as it's within spec's.

 

[merlin el mago]

Thank you again.

 

[Mark Tillotson]

In general MOSFETs are enhancement mode (there a few exceptions), JFETs are always depletion mode by their nature.


For MOSFETs Vgs device variability is a fact of life, and it changes with age and use too due to ion migration effects (modern devices are a lot better for this).