Power amplifier circuit

A power amplifier comprising:

• an input that receives a first input signal having a first phase and a second input signal having a second phase that is opposite to the first phase;
• a first transistor that includes a source that is supplied with a first voltage, and a gate that receives the first input signal from the input;
• a second transistor that includes a source that is supplied with the first voltage, and a gate that receives the second input signal from the input;
• a first neutralizer that is connected between the gate of the second transistor and a drain of the first transistor and neutralizes a parasitic element;
• a second neutralizer that is connected between the gate of the first transistor and a drain of the second transistor and neutralizes a parasitic element;
• N third transistors that are cascode-connected to the drain of the first transistor, N being an integer equal to or higher than 1;
• N fourth transistors that are cascode-connected to the drain of the second transistor;
• and
• an output that is connected to a drain of a N-th third transistor from among the N third transistors and a drain of a N-th fourth transistor from among the N fourth transistors and outputs a first output signal having a third phase and a second output signal having a fourth phase that is opposite to the third phase.