PSpice User Guide

PSpice User Guide

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PSpice User Guide Analog behavioral modeling October 2019 357 Product Version 17.4-2019 © 1999-2019 All Rights Reserved. device), for example, I(VSENSE). Voltage sources with a value of 0 are handy for sensing current for use in these expressions. Functions may be used in expressions, along with arithmetic operators (+, -, *, and /) and parentheses. Available built-in functions are summarized in Table 3-4 on page 164. The EVALUE and GVALUE parts are defined, in part, by the following properties (default values are shown): EVALUE EXPR V(%IN+, %IN-) GVALUE EXPR V(%IN+, %IN-) Sources are controlled by expressions which may contain voltages, currents, or both. The following examples illustrate customized EVALUE and GVALUE parts. Example 1 In the example of an EVALUE device shown in Figure 6-15, the output voltage is set to 5 volts times the square root of the voltage between pins %IN+ and %IN-. Figure 6-15 EVALUE part example. The property settings for this device are as follows: EXPR = 5v * SQRT(V(%IN+,%IN-))

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