Inverter type power amplifier

An inverter type power amplifier comprising:

• a first stage of power amplifier comprising a first transistor, a second transistor and a feedback resistor, wherein the feedback transistor comprises a first terminal connected to an input port and a second terminal connected to an output port;
• a second stage of power amplifier comprising a first transistor, a second transistor and a feedback resistor, wherein the feedback resistor comprises a first terminal connected to an input port and a second terminal connected to an output port, and the second stage of power amplifier is connected to the first stage of power amplifier in series;
• a third stage of power amplifier comprising a first transistor and a second transistor, wherein the third stage of power amplifier is connected to the second stage of power amplifier in series;
• a first AC blocking block comprising a first terminal connected to the input port of the first stage of power amplifier and a second terminal connected to the first transistor of the third stage of power amplifier;
• and
• a second AC blocking block comprising a first terminal connected to the input port of the second stage of power amplifier and a second terminal connected to the second transistor of the third stage of power amplifier.

An inverter type power amplifier comprising:

• a first transistor including a gate to which an AC type of input signal is applied through an input port, a first terminal of the first transistor connected a power source voltage, and a second terminal of the first transistor connected to a first output port;
• a second transistor including a gate through which the input signal is applied thereto, a first terminal of the second transistor connected to a ground, and a second terminal of the second transistor connected to the first output port;
• a feedback resistor including a first terminal connected to the input port and a second terminal connected to the first output port;
• and
• an AC blocking block including a first terminal and a second terminal, the first terminal of the AC blocking block connected to the first output port and the second terminal of the AC blocking block connected to a second output port, wherein
• the AC blocking block blocks alternating current (AC) applied to the gate of the first transistor through the input port and only direct current (DC) is outputted to the second output port without additional bias circuit.