Noise-Cancelling CMOS Active Inductor and Its Application in RF Band-Pass Filter Design

Abstract EN

A CMOS active inductor with thermal noise cancelling is proposed.

The noise of the transistor in the feed-forward stage of the proposed architecture is cancelled by using a feedback stage with a degeneration resistor to reduce the noise contribution to the input.

Simulation results using 90 nm CMOS process show that noise reduction by 80% has been achieved.

The maximum resonant frequency and the quality factor obtained are 3.8 GHz and 405, respectively.

An RF band-pass filter has been designed based on the proposed noise cancelling active inductor.

Tuned at 3.46 GHz, the filter features total power consumption of 1.4 mW, low noise figure of 5 dB, and IIP3 of −10.29 dBm.