Keithley S530

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
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