Cambridge Silicon Radio Limited

Maxime Vignasse

Pasquale Lamanna

Giuseppe Gramegna

An apparatus for propagating local oscillator signals in a circuit, the apparatus comprising two pairs of lines carrying respectively differential in-phase and quadrature signals. The lines are arranged such that in at least one region along their length one of each pair of lines crosses the other of the pair to create a twist. The twist(s) in each respective pair of lines is offset from the twist(s) in the other pair of lines such that the portion of their length over which the in-phase lines magnetically couple to the quadrature lines with a positive coupling coefficient is substantially equal to the portion of their length over which the in-phase lines magnetically couple to the quadrature lines with a negative coupling coefficient.

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Villeneuve-Loubet, France

Maxime Vignasse