An integrated circuit for preventing unwanted oscillation modes, the integrated circuit comprising: electronic circuitry of a first oscillator (220, 240); a first inductor (225, 245) configured for use in an LC tank of the first oscillator, wherein the LC tank of the first oscillator comprises a first capacitance; electronic circuitry of a second oscillator (220, 240); a second inductor (225, 245) configured for use in an LC tank of the second oscillator, the second inductor being loosely coupled to the first inductor, and wherein the LC tank of the second oscillator comprises a second capacitance; an oscillator control module for the second oscillator, the oscillator control module for the second oscillator being configured to switch a third capacitance into or out of the LC tank of the second oscillator when the second oscillator is inactive, wherein switching the third capacitance causes an oscillation mode of the LC tank of the first oscillator to change from a first mode to a second mode characterized in that either the tuning frequency band of the second oscillator is below the tuning frequency band of the first oscillator and the resonant frequency of the LC tank of the second oscillator is above the lowest resonant frequency of the first oscillator, or the tuning frequency band of the second oscillator is above the tuning frequency band of the first oscillator and the resonant frequency of the LC tank of the second oscillator is below the highest resonant frequency of the first oscillator. electronic circuitry of a first oscillator (220, 240); a first inductor (225, 245) configured for use in an LC tank of the first oscillator, wherein the LC tank of the first oscillator comprises a first capacitance; electronic circuitry of a second oscillator (220, 240); a second inductor (225, 245) configured for use in an LC tank of the second oscillator, the second inductor being loosely coupled to the first inductor, and wherein the LC tank of the second oscillator comprises a second capacitance; an oscillator control module for the second oscillator, the oscillator control module for the second oscillator being configured to switch a third capacitance into or out of the LC tank of the second oscillator when the second oscillator is inactive, wherein switching the third capacitance causes an oscillation mode of the LC tank of the first oscillator to change from a first mode to a second mode characterized in that either the tuning frequency band of the second oscillator is below the tuning frequency band of the first oscillator and the resonant frequency of the LC tank of the second oscillator is above the lowest resonant frequency of the first oscillator, or the tuning frequency band of the second oscillator is above the tuning frequency band of the first oscillator and the resonant frequency of the LC tank of the second oscillator is below the highest resonant frequency of the first oscillator. the tuning frequency band of the second oscillator is below the tuning frequency band of the first oscillator and the resonant frequency of the LC tank of the second oscillator is above the lowest resonant frequency of the first oscillator, or the tuning frequency band of the second oscillator is above the tuning frequency band of the first oscillator and the resonant frequency of the LC tank of the second oscillator is below the highest resonant frequency of the first oscillator.