Power amplifier circuits with dual-polarity

A cartesian transmitter comprising a first power amplifier circuits for amplifying an In-phase input signal and providing an In-phase output signal and a second power amplifier circuit for amplifying a Quadrature-phase signal and providing a Quadrature-phase output signal, each of the first and second power amplifier circuits comprising:

• a first transistor arrangement comprising a first terminal, a second terminal and a third terminal;
• a first inductor;
• a second inductor;
• and
• a third inductor coupled to a load;
• the first terminal of the first transistor arrangement is coupled to an input signal;
• the second terminal of the first transistor arrangement is coupled to a first supply voltage via the first inductor;
• the third terminal of the first transistor arrangement is coupled to a second supply voltage via the second inductor;
• the first and second inductors are coupled to the third inductor such that voltages over the first and second inductors are transformed to the load and added constructively at the load;
• the first and second supply voltages are modulated individually between a first voltage level and a second voltage level, the second voltage level being higher than the first voltage level;
• the first transistor arrangement is operating in a switching mode such that an output signal voltage with either a negative or positive amplitude proportional to the difference between the first and second supply voltages is created and provided to the load;
• the input signal for the first power amplifier circuit being the In-phase input signal;
• the input signal for the second power amplifier circuit being the Quadrature-phase signal;
• the output signal voltage of the for the first power amplifier circuit being circuit being a voltage of In-phase output signal;
• and
• the output signal voltage of the for the first power amplifier circuit being circuit being a voltage of the Quadrature-phase output signal.

A polar transmitter comprising a power amplifier circuit for amplifying an input signal and providing an output signal to a load, the power amplifier circuit comprising:

• a first transistor arrangement comprising a first terminal, a second terminal and a third terminal;
• a first inductor;
• a second inductor;
• and
• a third inductor coupled to the load;
• the first terminal of the first transistor arrangement is coupled to an input signal;
• the second terminal of the first transistor arrangement is coupled to a first supply voltage via the first inductor;
• the third terminal of the first transistor arrangement is coupled to a second supply voltage via the second inductor;
• the first and second inductors are coupled to the third inductor such that voltages over the first and second inductors are transformed to the load and added constructively at the load;
• the first and second supply voltages are modulated individually between a first voltage level and a second voltage level, the second voltage level being higher than the first voltage level;
• and
• the first transistor arrangement is operating in a switching mode such that the output signal voltage with either a negative or positive amplitude proportional to the difference between the first and second supply voltages is created and provided to the load.