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PSpice User Guide Analog behavioral modeling October 2019 347 Product Version 17.4-2019 © 1999-2019 All Rights Reserved. ABM expression parts The expression parts are shown in Table 6-3. These parts can be customized to perform a variety of functions depending on your requirements. Each of these parts has a set of four expression building block properties of the form: EXPn where n = 1, 2, 3, or 4. During netlist generation, the complete expression is formed by concatenating the building block expressions in numeric order, thus defining the transfer function. Hence, the first expression fragment should be assigned to the EXP1 property, the second fragment to EXP2, and so on. Expression properties can be defined using a combination of arithmetic operators and input designators. You may use any of the standard PSpice arithmetic operators (see Table 3-3 on page 164) within an expression statement. You may also use the EXPn properties as variables to represent nets or constants. The following examples illustrate a variety of ABM expression part applications. Table 6-3 ABM expression parts Part Inputs Output ABM none V ABM1 1 V ABM2 2 V ABM3 3 V ABM/I none I ABM1/I 1 I ABM2/I 2 I ABM3/I 3 I