13: LPT library function reference Model 4200A-SCS Parameter Analyzer
13-82 4200A-901-01 Rev. C / February 2017
Example
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conpin(GND, 2, 3, 0);
conpin(SMU1, 1, 0);
conpin(SMU2, 4, 0);
forcev(SMU1, .5);
trigig(SMU1, +1.E-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, 5.E-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.
Also see
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