A Novel Linearization Method of CMOS Drive Amplifier Using IMD Canceller

초록

A novel linearization method for CMOS drive amplifier using intermodulation distortion (IMD) canceller is presented. The IMD cancellation method is composed of a cascode main amplifier and a common- source IMD canceller. The additional common- source amplifier generates IMD3 signals with 180 phase difference against the IMD3 of the cascode main amplifier. The linear drive amplifier is designed and fabricated by CMOS 0.18 mu m process. The output IP(3) of +13 dBm is achieved with the power gain of +11.6 dB, the output P(1 dB) of +5.5 dBm, and the power-added efficiency of 21%.

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