A low flicker noise direct conversion receiver for IEEE 802.11g wireless LAN using differential active inductor

In this paper, a low flicker-noise, 2.4GHz direct onversion receiver (DCR) has been designed. A dynamic current injection (DCI) technique has been utilized in addition with a tuning inductor in the mixing stage. The tuning inductor has been replaced by a differential active inductor circuit, which gives the same inductance, with less chip size and high quality factor. The DCR has been designed in a TSMC 0.18µm 1P6M CMOS process for wireless LAN 802.11g applications. The proposed DCR achieves 6.7dB SSB-NF, 34dB conversion gain, -13.5dBm IIP3, and flicker noise (1/f) corner frequency of 30kHz with 137.5mW power consumption from 1.8V supply voltage.

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