Tektronix Keithley 4225-PMU User Manual

Model 4200A
-SCS Pulse Card (PGU and PMU) User's Manual Section 8:
Testing flash memory
4200A-PMU-900-01 Rev. B March 2023 8-3
Nonaxial stress on the bulkhead connectors on the SMU or pulse cards could cause damage
to the cards installed in the 4200A-SCS chassis. Pre-torque the connections to prevent
this damage.
To remove the triaxial-to-SMA adapter from a SMU, pull on the knurled silver portion of the connector
to release the latches from the SMU connector.
Failure to fully disengage the triaxial-to-SMA adapter latches may result in damage to the
adapter and the SMU.
Programming and erasing flash memory
A floating gate (FG) transistor is a modified field-effect transistor with an additional floating gate. The
FG transistor is the basic storage structure for data in nonvolatile memory. The floating gate stores
charge, which represents data in memory.
The control gate (CG) reads, programs, and erases the FG transistor. The presence of charge on the
gate shifts the voltage threshold (V
T
) to a higher voltage, as shown in the following figure.
Figure 153: Cross section of a floating gate transistor in the erased and programmed states
The control gate (CG) reads, programs, and erases the FG transistor. The presence of charge on the
gate shifts the voltage threshold (V
T
) to a higher voltage, as shown below.

Tektronix Keithley 4225-PMU Specifications

General

Brand	Tektronix
Model	Keithley 4225-PMU
Category	Computer Hardware
Language	English