Keithley S530 User Manual

Section 3: Test subroutine library reference S530 Parametric Test System Test Subroutine Library User's Manual
3-46 S530-907-01 Rev. A / September 2015
Source-measure units (SMUs)
 SMU1: Forces vds, maximum current limit, measures IDS
 SMU2: Sweeps V
GS
, maximum current limit
 SM3: Forces vbs, default current limit
Example
idvsvg(d, g, s, sub, vlow, vhigh, vds, vbs, npts, &id, &vg);
Schematic
isubmx
This subroutine finds peak substrate current at drain-source voltage (V
DS
) and finds substrate bias voltage (V
BS
).
Usage
void isubmx(int d, int g, int s, int sub, double vds, double vbs, double vlow,
double vhigh, int npts, double *ismax, double *vgmax)
d
Input
The drain pin of the device
g
Input
The gate pin of the device
s
Input
The source pin of the device
sub
Input
The substrate pin of the device
vds
Input
The forced drain voltage, in volts
vbs
Input
Substrate bias, in volts
vlow
Input
The start of the gate voltage (V
GS
) sweep
vhigh
Input
The end of the V
GS
sweep
npts
Input
The number of points in the sweep
ismax
Output
Peak substrate current:
 -1.0 = Substrate not specified
 +4.0E+21 = Measured drain current (I
DS
) is within 98 % of the
drain current limit (200 mA)
vgmax
Output
V
GS
at ismax

Keithley S530 Specifications

General

Brand	Keithley
Model	S530
Category	Test Equipment
Language	English