3.3 Trans-capacitor
3.3.1 Syntax
Device
.tcapacitor label n+ n– nc+ nc– value
.tcapacitor label n+ n– nc+ nc– expression
.tcapacitor label n+ n– nc+ nc– value
{IV=initial-voltage}
.tcapacitor label n+ n– model {L=length}
{W=width} {IC=initial-voltage}
Model (optional)
.model mname C {args}
.model mname TABLE {args}
3.3.2 Purpose
Trans-capacitor, or charge transfer device.
3.3.3 Comments
N+ and n– are the positive and negative element nodes,
respectively. Nc+ and nc– are the positive and negative
controlling nodes, respectively.
This device places a charge between the output nodes that depends on
the voltage on its input nodes. If you parallel the input with the
output, it becomes an ordinary capacitor. While the use of this
device may appear straightforward, be careful. It is easy to use it
in an unstable way.
All options, expressions, models, and probes that apply to ordinary
capacitors can also be used here.
It is used internally in some transistor models.
3.3.4 Probes
All probes that apply to ordinary capacitors also apply here.