Inductor arrangements

Integrated circuitry having one or more layers and comprising an inductor arrangement, the inductor arrangement comprising:

• a first pair of driven inductors configured to produce magnetic fields which are substantially in antiphase, and arranged relative to one another so that their magnetic fields substantially cancel one another at a first null line between those inductors;
• and
• a second pair of driven inductors configured to produce magnetic fields which are substantially in antiphase, and arranged relative to one another so that their magnetic fields substantially cancel one another at a second null line between those inductors,
• wherein the pairs of driven inductors are arranged relative to one another so that the first and second null lines intersect one another, with the first pair of driven inductors located substantially on the second null line and the second pair of inductors located substantially on the first null line,
• wherein the first and second pairs of inductors are formed in the same layer of the integrated circuitry,
• wherein the inductors of the first and second pairs all have the same size and number of turns as each other,
• wherein the driven inductors of the first and second pairs are differential inductors,
• wherein one of the driven inductors of the first pair includes a first centre-tap node, and the other of the driven inductors of the first pair includes a third centre-tap node,
• wherein one of the driven inductors of the second pair includes a second centre-tap node, and the other of the driven inductors of the second pair includes a fourth centre-tap node, and
• wherein the driven inductors of the first pair are centre-tapped with the first and third centre-tap nodes of the driven inductors of the first pair being electrically connected together, and the driven inductors of the second pair are centre-tapped with the second and fourth centre-tap nodes of the driven inductors of the second pair being electrically connected together.