techniques are provided for compensating for variations in capacitance of capacitors used in resonant circuits , particularly varactors used in voltage - controlled oscillators . indications of actual varactor capacitances are used to determine which of several inductances to use in the resonant circuit with the varactor . the inductances may be composed of a bondwire inductance , and may also be composed of one or more coil inductors . based on the determined capacitance indication , a bondwire is connected from a common bondpad to a selected bondpad to complete the resonant tank circuit such that an lc product of the tank circuit is within a desired or acceptable lc product range .