3.8 Voltage Controlled Capacitor
3.8.1 Syntax
Preferred syntax:
.VCCAP label n+ n– nc+ nc– expression
Alternate syntax:
Gxxxxxxx n+ n– VCCAP nc+ nc– expression
3.8.2 Purpose
Voltage controlled capacitor.
3.8.3 Probes
All probes that apply to ordinary capacitors also apply here.
3.8.4 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
Farads per volt.
The simulator will faithfully give you a negative capacitor if it
seems appropriate. Usually, this part is used with a behavioral
modeling function, like PWL, which allows you to specify a table of
capacitance vs. voltage.