3.10  Voltage Controlled Resistor

3.10.1  Syntax

Preferred syntax:
.VCR label n+ n– nc+ nc– expression
Alternate syntax:
Gxxxxxxx n+ n– VCR nc+ nc– expression

3.10.2  Purpose

Voltage controlled resistor.

3.10.3  Comments

N+ and n– are the positive and negative element (output) nodes, respectively. Nc+ and nc– are the positive and negative controlling nodes, respectively. Value is the transfactor in ohms per volt.

The simulator will faithfully give you a negative resistor if it seems appropriate. Usually, this part is used with a behavioral modeling function, like PWL, which allows you to specify a table of resistance vs. voltage.