Technique for crosstalk reduction

A radio communication device, comprising:

• an integrated circuit having a first controlled oscillator and a second controlled oscillator;
• and
• an arrangement for reducing a crosstalk signal generated by the first controlled oscillator to the second controlled oscillator, the arrangement comprising:
• a first crosstalk detector adapted to detect the crosstalk signal generated by the first controlled oscillator (CO) to the second controlled oscillator (CO);
• a first crosstalk cancellation circuit adapted to generate a cancellation signal having an amplitude substantially the same as that of the crosstalk signal and a phase substantially opposite to that of the crosstalk signal;
• and
• a first cancellation signal injector adapted to introduce the cancellation signal into the second CO, wherein
• the first crosstalk detector comprises:
• a mixer stage adapted to produce a mixed signal (m1(t)) by mixing a clock signal (S1(t)) generated by the second CO with a signal having a fixed relationship with the clock signal (S1(t)) generated by the second CO;
• a filter adapted to filter the mixed signal (m1(t)) to produce a filtered signal;
• a signal converter adapted to down-convert the filtered signal into a signal (m2(t)) which is an indication for the crosstalk signal.