Multi-phase amplifier circuits and methods for generating an amplified output signal

A method for generating an amplified output signal, the method comprising:

• generating a plurality of phase signals;
• and
• providing the plurality of phase signals to a plurality of inductors,
• wherein a first pair of inductors have a first inductive coupling that is different from an inductive coupling of a second pair of inductors by a first coupling difference, wherein a plurality of first phase signals comprising a first phase difference of less than about 180° are provided to the first pair of inductors and a plurality of second phase signals comprising the first phase difference are provided to the second pair of inductors,
• wherein a third pair of inductors have an inductive coupling that is different from an inductive coupling of a fourth pair of inductors by a second coupling difference, wherein a plurality of third phase signals comprising a second phase difference of about 180° are provided to the third pair of inductors and a plurality of fourth phase signals comprising the second phase difference are provided to the fourth pair of inductors,
• wherein an absolute value of the first coupling difference is smaller than or equal to an absolute value of the second coupling difference.

A method for generating an amplified output signal, the method comprising:

• generating a plurality of phase signals;
• and
• providing the plurality of phase signals to a plurality of inductors,
• wherein a first phase signal is provided to a first inductor of the plurality of inductors, a second phase signal is provided to a second inductor of the plurality of inductors and a third phase signal is provided to a third inductor of the plurality of inductors, wherein a phase difference between the first phase signal and the second phase signal is about 180° and a phase difference between the first phase signal and the third phase signal is larger than about 180° , wherein an inductive coupling between the first inductor and the second inductor is smaller than an inductive coupling between the first inductor and the third inductor.