A system for mitigating a crosstalk signal in the output signal of a first controlled oscillator (30-1) resulting from crosstalk from a second controlled oscillator (30-2), the system comprising: a first phase-locked loop (26-1) comprising the first controlled oscillator (30-1) comprising a first resonant tank comprising an inductor (32-1) and one or more capacitors and adapted to provide an output signal at a first frequency; a second phase-locked loop (26-2) comprising the second controlled oscillator (30-2) comprising a second resonant tank comprising an inductor (32-2) and one or more capacitors and adapted to provide an output signal at a second frequency; and a compensation signal generator adapted to: generate a compensation signal at an offset frequency that is approximately equal to an offset between the first frequency and the second frequency; apply the compensation signal to the first controlled oscillator (30-1) by switching a capacitor of the one or more capacitors in the first resonant tank of the first controlled oscillator (30-1) such that the output signal of the first controlled oscillator is modulated by the compensation signal; wherein an amplitude and phase of the compensation signal are such that, when the compensation signal is applied to the first controlled oscillator (30-1), a crosstalk signal in the output signal of the first controlled oscillator (30-1) resulting from crosstalk from the second controlled oscillator (30-2) of the second phase locked loop (26-2) to the first controlled oscillator (30-1) of the first phase-locked loop(26-1) is mitigated. a first phase-locked loop (26-1) comprising the first controlled oscillator (30-1) comprising a first resonant tank comprising an inductor (32-1) and one or more capacitors and adapted to provide an output signal at a first frequency; a second phase-locked loop (26-2) comprising the second controlled oscillator (30-2) comprising a second resonant tank comprising an inductor (32-2) and one or more capacitors and adapted to provide an output signal at a second frequency; and a compensation signal generator adapted to: generate a compensation signal at an offset frequency that is approximately equal to an offset between the first frequency and the second frequency; apply the compensation signal to the first controlled oscillator (30-1) by switching a capacitor of the one or more capacitors in the first resonant tank of the first controlled oscillator (30-1) such that the output signal of the first controlled oscillator is modulated by the compensation signal; generate a compensation signal at an offset frequency that is approximately equal to an offset between the first frequency and the second frequency; apply the compensation signal to the first controlled oscillator (30-1) by switching a capacitor of the one or more capacitors in the first resonant tank of the first controlled oscillator (30-1) such that the output signal of the first controlled oscillator is modulated by the compensation signal; wherein an amplitude and phase of the compensation signal are such that, when the compensation signal is applied to the first controlled oscillator (30-1), a crosstalk signal in the output signal of the first controlled oscillator (30-1) resulting from crosstalk from the second controlled oscillator (30-2) of the second phase locked loop (26-2) to the first controlled oscillator (30-1) of the first phase-locked loop(26-1) is mitigated. <EOS>