HP 4155A Programmer's Guide

Getting Started on Programming the HP 4155A/4156A
Example Application Setup for Vth Measurement
X-axis Y1-axis Y2-axis
NAME Vg SQRTId GRAD
SCALE LINEAR LINEAR LINEAR
MIN 0V 0 0
MAX 5V 200 m 80 m
GRID LINE PARAMETER DATAVARIABLES
ON ON VTH
BETA
The auto analysis functions are dened on DISPLAY: ANALYSIS SETUP page
as shown below. A tangent line (line 1) is drawn to \SQRTId versus Vg"
curve (Y1) at point where GRAD is maximum. VTH is the X-intercept of this
line. Also, the marker is moved to point where GRAD is maximum.
*LINE1: [TANGENT] line on [Y1] at a point where
[GRAD] = [MAX(GRAD)]
If you execute a single measurement, the two curves are drawn. Right after
the measurement, a tangent line is drawn as specied in DISPLA
Y: ANALYSIS
SETUP page, and resulting VTH and BETA values are displayed.
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HP 4155A Specifications

General

Brand	HP
Model	4155A
Category	Measuring Instruments
Language	English