Agilent Technologies B1500A

Agilent B1500 VXIplug&play Driver User’s Guide, Edition 3 4-49
Programming Examples for C++ Users
CV Sweep Measurement
CV Sweep Measurement
Table 4-18 explains example subprogram that performs capacitance-voltage (CV)
sweep measurement. This example measures MOSFET gate-substrate capacitance
by using the multi frequency capacitance measurement unit (MFCMU) and a
SMU/CMU unify unit (SCUU).
To perform the example subprogram shown in Table 4-18, you need the following
setup.
• Insert the following line to the program (at the top of the program).
#include <windows.h>
• Insert the subprograms shown in Table 4-15 and Table 4-16 to the program
(between the check_err subprogram and the perform_meas subprogram).
• phase_compen subprogram
• open_corr subprogram
Measurement
Result Example
Vg (V), Cp (pF), C_st, G (uS), G_st, OSC (mV), Osc_st, DC (V),
Dc_st, Time (s)
-5.00, 6.202100, 0, 26.875410,0, 0.028928, 0, -4.766712,0,
0.068000
-4.50, 6.087977, 0, 27.947160,0, 0.028788, 0, -4.278384,0,
0.099200
-4.00, 5.865161, 0, 28.995180,0, 0.028624, 0, -3.791224,0,
0.130200
-3.50, 5.519113, 0, 29.811330,0, 0.028439, 0, -3.306136,0,
0.163800
-3.00, 5.015963, 0, 29.972460,0, 0.028244, 0, -2.823224,0,
0.195300
-2.50, 4.357405, 0, 28.915330,0, 0.028053, 0, -2.343864,0,
0.226800
-2.00, 3.573436, 0, 25.794280,0, 0.027879, 0, -1.868600,0,
0.258800
-1.50, 2.755418, 0, 19.721990,0, 0.027746, 0, -1.395728,0,
0.300200
-1.00, 2.050863, 0, 9.591391,0, 0.027686, 0, -0.926856,0, 0.339600
-0.50, 1.693124, 0, -1.083336,0, 0.027855, 0, -0.462352,0,
0.379000
0.00, 1.670888, 0, -1.539810,0, 0.027799, 0, 0.000008,0, 0.418600
0.50, 1.676428, 0, -1.631684,0, 0.027893, 0, 0.462584,0, 0.458000
1.00, 1.683344, 0, -1.567104,0, 0.028070, 0, 0.929184,0, 0.497400
1.50, 1.679261, 0, -1.447587,0, 0.028251, 0, 1.399624,0, 0.538800
2.00, 1.672819, 0, -1.343502,0, 0.028426, 0, 1.873040,0, 0.580200
2.50, 1.674055, 0, -1.170644,0, 0.028597, 0, 2.348496,0, 0.618800
3.00, 1.668154, 0, -1.003915,0, 0.028753, 0, 2.827728,0, 0.657000
3.50, 1.671890, 0, -0.661217,0, 0.028886, 0, 3.309432,0, 0.698400
4.00, 1.671370, 0, -0.057262,0, 0.028993, 0, 3.792928,0, 0.737800
4.50, 1.661781, 0, 0.952458,0, 0.029073, 0, 4.277680,0, 0.779400
5.00, 1.635690, 0, 2.552799,0, 0.029128, 0, 4.763176,0, 0.821000