Amplifier high linearization method based on offset cancellation technique

A novel structure based on cancellation was presented for linearizing amplifiers. This robust circuit compensates high order nonlinearity by 4-phase offset signals. A third order specified example was illustrated. Theoretically, the third order nonlinearity would be totally eliminated when using the proposed arrangement. It is especially designed for large swing signals and low power application. An on chip filter for MEMS sensor interface verified the principle. In practice, it was observed that the total harmonic distortion level was reduced up to 13.5 db.