Enables the transmembrane transfer of a cation by a voltage-gated channel. A cation is a positively charged ion. A voltage-gated channel is a channel whose open state is dependent on the voltage across the membrane in which it is embedded.
voltage-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential
voltage-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential