An electronic circuit has an inductor. The inductor comprises a first number of electrically conductive tracks (108, . . . ) in, or on, a substrate (105). The tracks are separated from one another. The inductor comprises a second number of electrically conductive wires (120, . . . ). The ends of each wire contacts two different ones of the tracks. Among the first number of tracks there is at least a specific track that is electrically isolated from the wires upon the wires having been connected. Such an inductor can be made using a standardized track configuration on a substrate, and selectively skipping one or more tracks in order to determine the inductance.