Chapter 4 Characteristics Measurement
Curve Tracer CS-3000 Series Instruction Manual
4-29
■
Measurement procedure
After step (19) in Section 4.1.3.1, I
D
vs. V
DS
characteristics is displayed.
(1) Press CURSOR key.
(2) Press F2 key on the right of the submenu "DOT."
(3) Rotate FUNCTION knob to move DOT to an arbitrary measurement point.
To move the cursor position (index), press FUNCTION knob.
VERT (current) value and HORIZ (voltage) value at the cursor position (index) are displayed.
gm
=
trans conductance as the result of cursor measurement is displayed on the lower part of
the screen.
(4) Rotate FUNCTION knob to move DOT to an arbitrary measurement point (ON resistance).
(5) On the cursor menu, press F3 on the right of the submenu "fLINE."
(6) Rotate FUNCTION knob so that the gradient of fLINE cursor is tangential to the characteristics
curve.
ON resistance value for FET at the arbitrary measurement point (position: index) is displayed in
the readout of CURSOR (f:1/grad).
gm
=
trans conductance
DOT cursor
Gradient of cursor line:
V
DS
/I
D
=
resistance (1/grad)
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