User`s guide

Agilent EasyEXPERT User’s Guide Vol. 1, Edition 1 4- 49
Function Details
SMU/PG Selector
SMU/PG Selector
Not available for the B1505A. Agilent 16440A SMU/PGU selector (B1500A-A04)
provides the built-in switching capability to select a measurement path connected to
the Output port. See
Figure 4-23 for the simplified circuit diagram of the selector.
The selector has the channels CH 1 and CH 2 which provide the following
conditions. It can be controlled by using the SMU/PG Selector tab screen of the
Configuration window. See
“SMU/PG Selector” on page 1-69.
CH 1 Open (no connection), SMU connect, PGU connect, and PGU open
CH 2 Open (no connection), SMU connect, and PGU connect
The PGU open is available only for the CH 1, and is made by keeping the PGU side
mechanical relay close and opening the semiconductor relay. This is effective for
frequent switching applications because the semiconductor relay is more durable
than mechanical relays. The PGU open can be set by using the Advanced Setup
window of the Measurement Setup. See
“Advanced Setup Window” on page 2-53.
Figure 4-23 SMU/PG Selector Circuit Diagram and Connections
The selector must be connected to the B1500A through the Digital I/O connector
and the Agilent 16445A Selector Adapter. Up to two selectors can be used by
connecting the selector control cable between the CONTROL Output connector of
the first selector and the CONTROL Input connector of the second selector.
AC power
16440A Selector #2 for DUT terminals 3 and 4
B1500A Digital I/O
DUT terminal 1
SMU #1 Force
PGU #1 or others
DUT terminal 2
SMU #2 Force
PGU #2 or others
16445A Selector Adapter
16440A Selector #1
Output
SMU Input
PGU Input
Output
SMU Input
PGU Input
16440A Selector
2
Mechanical relay
Semiconductor relay
1
2
CONTROL
Input
Output
CONTROL
Input
Output
CONTROL
Input
Output
1
1
1
1
Input
Output
Input
Input
Output
Input
CH 1
CH 2
CH 1
CH 2
CH 1
CH 2