Active inductor and associated amplifying circuit

An amplifying circuit, comprising:

• a first transistor, wherein a gate terminal of the first transistor receives a first input signal, and a drain terminal of the first transistor generates a first output signal;
• a first active inductor connected between a first voltage source and the drain terminal of the first transistor;
• and
• a first bias current source connected between a second voltage source and a source terminal of the first transistor,
• wherein the first active inductor comprises a second transistor, a third transistor, a first capacitor, a first resistor, a second resistor and a second bias current source, wherein a source terminal of the second transistor is connected to the first voltage source, a first terminal of the first capacitor is connected to the source terminal of the second transistor, a second terminal of the first capacitor is connected to a gate terminal of the second transistor, a drain terminal of the third transistor is connected to the source terminal of the second transistor, a gate terminal of the third transistor is connected to a drain terminal of the second transistor, a first terminal of the first resistor is connected to the drain terminal of the second transistor, a second terminal of the first resistor is connected to the drain terminal of the first transistor, a first terminal of the second resistor is connected to a source terminal of the third transistor, a second terminal of the second resistor is connected to the gate terminal of the first transistor, a first terminal of the second bias current source is connected to the second terminal of the second resistor, and a second terminal of the second bias current source is connected to a second voltage source.