
S530/S540 KTE Linear Parametric Test Library (LPTLib) User's Manual
Section 3: LPTLib command reference
S530-900-01 Rev. E / September 2017
3-59
Example
float res1, res2;
.
.
conpin(GND, 2, 3, 0);
conpin(SMU1, 1, 0)
conpin(SMU2, 4, 0)
forcev(SMU1, .5)
trigil(SMU1, -1e-5) /* Set the trigger point for -10 mA. */
searchv(SMU2, 0.0, 3.0, 7, 2.0E-5, &res1) /* Increase */
/* voltage until trigger */
/* point occurs. Return results to res1. */
pulsev(SMU2, 20.0, 5e-1) /* Apply a 20 V pulse to the */
/* gate for 500 ms. */
searchv(SMU2, 0.0, 3.0, 7, 2.0E-5, &res2) /* Increase */
/* voltage until trigger */
/* point occurs. Return results */
/* to res2. */
This example measures the threshold voltage shift of an FET by calling two
searchv
commands:
1. The
searchv
command measures the gate voltage required to initiate a drain current of 10
μA.
2. The
searchv
command measures the gate voltage required to initiate a drain current of 10 μA
immediately after a 20 V pulse is applied to the gate.
Note that the second
searchv
command was called without reprogramming the
trigil
command. This
is possible because the clear trigger command (
clrtrg
) was not used.
Equation 7: FET threshold voltage
Also see
None