Section 3: Test subroutine library reference
S530 Parametric Test System Test Subroutine Library User's Manual
3-12
S530-907-01 Rev. A / September 2015
Details
This subroutine sweeps the collector-base voltage from
vcbstart
to
vcbstop
while monitoring the
collector current with the emitter open. When the programmed current level (
ipgm
) is reached, the
last collector-base voltage increment is returned as
BVCBO1
.
If a positive substrate pin is specified, the substrate is grounded. If a positive substrate pin is not
specified, the substrate is left floating.
The
udelay
parameter should be programmed to approximate c *
vcbmax
/
ipgm
, where c =
junction capacitance of the device under test.
V/I polarities
The polarities of
vcbmin
,
vcbmax
, and
ipgm
are determined by device type.
Source-measure units (SMUs)
SMU1: Forces V
CB
, programmed current limit = 1.25 *
ipgm
, measures collector current (I
CBO
)
Example
Result = bvcbo1(e, b, c, sub, vcbmin, vcbmax, nstep, ipgm, udelay, type);
Schematic
