| Noun | 1. | characterisic function - (electronics) graph showing how a particular characteristic of a device varies with other parameters electronics - the branch of physics that deals with the emission and effects of electrons and with the use of electronic devices graph, graphical record - a visual representation of the relations between certain quantities plotted with reference to a set of axes frequency-response characteristic, frequency-response curve - (electronics) a graph of frequency response with signal amplitude or gain plotted against frequency |