Preferred syntax:
.VCG label n+ n- nc+ nc- expression
Alternate syntax:
Gxxxxxxx n+ n- VCG nc+ nc- expression
Voltage controlled admittance.
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 mhos per volt.
The simulator will faithfully give you a negative admittance if it
seems appropriate. Usually, this part is used with a behavioral
modeling function, like PWL, which allows you to specify a table of
admittance vs. voltage.