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

Author(s): Santosh Vema Krishnamurthy | Kamal El-Sankary | Ezz El-Masry

Journal: International Journal of Microwave Science and Technology
ISSN 1687-5826

Volume: 2010;
Date: 2010;
Original page

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.
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