Staircase Sweep With Pulsed Bias Measurement - Agilent Technologies B1500A User Manual

Table 3-11
Programming Examples for Visual Basic Users

Staircase Sweep with Pulsed Bias Measurement

Staircase Sweep with Pulsed Bias Measurement
Table 3-11 explains example subprograms that enable/disable measurement
channels (perform_meas), perform the staircase sweep with pulsed bias
measurement (sweep_meas), and save measurement result data into a file
(save_data). This example measures MOSFET Id-Vd characteristics.
Staircase Sweep with Pulsed Bias Measurement Example
Sub perform_meas(vi As Long, ret As Long)
Dim m(4) As Long
m(0) = 1
m(1) = 2
m(2) = 4
m(3) = 6
ret = agb1500_setSwitch(vi, m(3), 1)
ret = agb1500_setSwitch(vi, m(2), 1)
ret = agb1500_setSwitch(vi, m(1), 1)
ret = agb1500_setSwitch(vi, m(0), 1)
check_err vi, ret
sweep_meas vi, ret, m()
ret = agb1500_setSwitch(vi, agb1500_CH_ALL, 0)
check_err vi, ret
End Sub
Line
1 Beginning of the perform_meas subprogram.
3 to 7 Declares variables, and defines the value.
9 to 12 Enables measurement channels.
15 Calls the sweep_meas subprogram (next page) to perform
staircase sweep measurement.
17 Disables measurement channels.
13 and 18 Calls the check_err subprogram (shown in Table 3-1) to check if
an error status is returned for the previous line.
20 End of the perform_meas subprogram.
3-50 Agilent B1500 VXIplug&play Driver User's Guide, Edition 3
'SMU port numbers
'SMU1: drain
'SMU2: gate
'SMU4: source
'SMU6: substrate
Description
'1
'3
'9
'13
'15
'17
'20