Patent ID: 8860507

Claim:
An amplifier, comprising: a transformer, including a primary coil and a secondary coil, wherein the primary coil is utilized for receiving an input signal; and a first stage gain circuit, including a first input port, wherein the first input port is coupled to the primary coil, and the first stage gain circuit is utilized for applying a gain to the input signal to generate a first output; wherein the first stage gain circuit comprises a first transistor and a second transistor, and each of the first transistor and the second transistor includes a control electrode, a first electrode and a second electrode; and the first input port comprises: a first input terminal, coupled to a first terminal of the primary coil; and a second input terminal, coupled to a second terminal of the primary coil; wherein the first electrode of the first transistor and the first electrode of the second transistor serve as the first input terminal and the second input terminal, respectively.