Expfitb Formulator Function - Keithley 4200A-SCS Reference Manual

Model 4200A-SCS Parameter Analyzer Reference Manual

EXPFITB Formulator function

Performs an exponential fit. Fits the following exponential relationship to a specified range of values in two
columns (vectors): one column, VX, containing X values and the other column, VY, containing Y values:
Y = EXPFITA * e
Where EXPFITA and EXPFITB are fit constants.
Returns the value of the constant EXPFITB in the relationship above.
Usage
EXPFIT(VX, VY, STARTPOS, ENDPOS)
VX
VY
STARTPOS
ENDPOS
Details
If a VX or VY value at either STARTPOS or ENDPOS is an invalid number (that is, the value is #REF),
the function will not return a valid result.
Example
DIODEIDEALITY = 1/(EXPFITB(ANODEV, ANODEI, 2, LASTPOS(ANODEV))*0.0257)
Also see
EXPFITA
EXPFITB
4200A-901-01 Rev. C / February 2017
(EXPFITB * X)
The name of any column (vector) listed under Columns
The name of any column (vector) listed under Columns
For the range of X and Y values to be exponentially fitted, the row number (index) of
the starting values
For the range of X and Y values to be exponentially fitted, the row number (index) of
the ending values
(on page 6-248)
(on page 6-249)
Section 6: Clarius
6-249