Any process that activates or increases the frequency, rate or extent of cyclic nucleotide-gated ion channel activity.
Synonyms:
exact_synonym:
activation of cyclic nucleotide activated ion channel activity; positive regulation of cyclic nucleotide activated ion channel activity; up regulation of cyclic nucleotide activated ion channel activity; up regulation of cyclic nucleotide gated ion channel activity; upregulation of cyclic nucleotide activated ion channel activity; upregulation of cyclic nucleotide gated ion channel activity
narrow_synonym:
activation of cyclic nucleotide-gated ion channel activity