Agilent Technologies B1500A Training Manual page 78

SMU/PG Selector
Easy to switch between SMU and PGU
●
Solid state relay
●
Channel 1
Channel 2
The selector has two channels as shown above. Each channel has two ports (SMU and PGU).
External pulse generators can also be connected. The connectors are Triax for SMUs and outputs,
and BNC for PGUs.
Up to two selectors (four channels) may be required for some reliability tests such as Flash
EEPROM.
As a special design for Flash memory, a solid state relay was added to float the drain. This
eliminates wear and tear of millions of closures that would occur with a mechanical relay.
16440A Selector
Input SMU
SW1
Input PGU
SW3
SW2
Input SMU
SW1
Input PGU
SW2
✓ Flash Memory Test
✓ Transistor photomos
12-18
To DUT
To DUT
SW1 & SW2 : Mechanical Relay
SW3: Solid State Relay
Module 12
Miscellaneous Operations