User`s guide

6
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14 Analo
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Behavioral Modelin
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Inte
g
rator and Differentiator
The integrator and differentiator parts are described below.
INTEG
The INTEG part implements a simple integrator. A current
source/capacitor implementation is used to provide support for
setting the initial condition.
DIFFER
The DIFFER part implements a simple differentiator. A voltage
source/capacitor implementation is used. The DIFFER part
provides one input and one output.
Table Look-Up Parts
TABLE and FTABLE parts provide a lookup table that is used
to correlate an input and an output based on a set of data points.
These parts are described below and on the following pages.
TABLE
The TABLE part allows the response to be defined by a table of
one to five values. Each row contains an input and a
corresponding output value. Linear interpolation is performed
between entries.
For values outside the table’s range, the device’s output is a
constant with a value equal to the entry with the smallest (or
largest) input. This characteristic can be used to impose an upper
and lower limit on the output. The TABLE part provides one
input and one output.
IC initial condition of the integrator output
GAIN gain value
GAIN gain value
ROWn is an (input, output) pair; by default, up to five
triplets are allowed where n=1, 2, 3, 4, or 5
If more than five values are
required, the symbol can be
customized throu
g
h the symbol
editor. Insert additional row
variables into the template usin
g
the same form as the first five,
and add ROW
n attributes as
needed to the list of attributes.