Keithley 4200A-SCS - Page 1186

Model 4200A
-SCS Parameter Analyzer Reference Manual Appendix D: Using a Model 82 C-
V System
4200A-901-01 Rev. C / February 2017 D-45
CHF
Output; the measured array of high frequency capacitance values
CHF_ArrSize
This must be set to a value equal to the number of voltage steps in the sweep
or value = ((VSub_Stop
−
VSub_Start) / VSub_Step
−
1)
VSub
Output; the array of bias voltages used
VSub_ArrSize
This must be set to a value equal to the number of voltage steps in the sweep
or value = ((VSub_Stop
−
VSub_Start) / VSub_Step
−
1)
CQS
Output; the measured array of quasistatic capacitance values
CQS_ArrSize
This must be set to a value equal to the number of voltage steps in the sweep
or value = ((VSub_Stop − VSub_Start) / VSub_Step − 1)
G_or_R
Output; the array of measured conductance (G) or resistance (R) values
G_or_R_ArrSize
This must be set to a value equal to the number of voltage steps in the sweep
or value = ((VSub_Stop
−
VSub_Start) / VSub_Step
−
1)
QT
Output; the array of Q/T from 595 output for each measurement step
QT_ArrSize
This must be set to a value equal to the number of voltage steps in the sweep
or value = ((VSub_Stop
−
VSub_Start) / VSub_Step
−
1)
Details
This user module uses the 590 and 595 to perform simultaneous C-V measurements. The following
figure shows the default parameters for the SIMCVsweep82 user module.
Figure 609: SIMCVsweep82 user module
It performs a staircase sweep from −3 V to +3 V in 20 mV steps, as shown in cvsweep test
description (on page D-16).
You can make an offset correction measurement and use the cable compensation.
For details on quasistatic measurements, see Simultaneous C-V sweep (on page D-15).