HP 4155A - Page 29

Getting Started
Analyzing the Results
8. Select
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
TANGENT MODE secondary softkey. The line becomes tangent to the
o marker of the Y1 curve.
TANGENT
MODE
secondary
softkey
A tangent
Marker o
Threshold voltage (Vth)
Read the X-axis intercept value of the tangent line
. This is the threshold
voltage (Vth). In the example above, Vth is 935 mV.
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