Bias modulation active linearization for broadband amplifiers

A power amplification method for broadband data communication over a path in a communication network while maintaining low distortion gain performance, the power amplification method comprising:

• amplifying an input signal using a differential pair arrangement of first and second transistors;
• varying a bias current to the first and second transistors of the differential pair in correspondence with the input signal amplitude including varying at the frequency of the input signal;
• and
• variably degenerating a gain of the first and second transistors of the differential pair to stabilize the gain of the power amplifier circuit with the bias current varying at the frequency of the input signal.

A power amplification circuit for broadband data communication over a path in a communication network while maintaining low distortion gain performance, the power amplification circuit comprising:

• means for amplifying an input signal;
• means for varying a bias current in correspondence with the input signal amplitude including varying at the frequency of the input signal;
• and
• means for variably degenerating a gain of the first and second transistors of the differential pair to stabilize the gain of the power amplifier circuit with the bias current varying at the frequency of the input signal.