TECHNIQUE FOR CROSSTALK REDUCTION

摘要

A technique for cancelling or reducing crosstalk signals between controlled oscillators in an integrated circuit is provided. The technique involves an arrangement adapted to reduce a crosstalk signal generated by a first controlled oscillator to a second oscillator both comprised in the integrated circuit, wherein both controlled oscillators are configured to output a respective clock signal. The arrangement comprises a detector adapted to detect the crosstalk signal generated by the first controlled oscillator to the second controlled oscillator, a 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 cancellation signal injector adapted to introduce the cancellation signal into the second controlled oscillator.

主权项

1. An arrangement for reducing crosstalk between a first controlled oscillator and a second controlled oscillator, the arrangement comprising:
a first crosstalk detector adapted to detect a 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 DC signal (m2(t)); andan output for outputting the DC (m2(t)) signal as an indication for the crosstalk signal.