Title :
A Linearization Technique for RF Receiver Front-End Using Second-Order-Intermodulation Injection
Author :
Lou, Shuzuo ; Luong, Howard C.
Author_Institution :
Hong Kong Univ. of Sci. & Technol, Hong Kong
Abstract :
A linearization technique is proposed in which low-frequency second-order-intermodulation (IM2) is generated and injected to suppress the third-order intermodulation (IM3). The proposed linearization technique is applied to both a low-noise amplifier (LNA) and a down-conversion mixer in an RF receiver front-end (RFE) working at 900 MHz. Fabricated in a 0.18 mum CMOS process and operated at 1.5 V supply with a total current of 13.1 mA, the RFE delivers 22 dB gain with 5.3 dB noise figure (NF). The linearization technique achieves around 20 dB IM3 suppression and improves the RFE´s IIP3 from -10.4 dBm to 0.2 dBm without gain reduction and noise penalty while requiring only an extra current of 0.1 mA.
Keywords :
CMOS integrated circuits; UHF amplifiers; UHF integrated circuits; UHF mixers; intermodulation; linearisation techniques; low noise amplifiers; radio receivers; CMOS process; RF receiver front-end; current 13.1 mA; down-conversion mixer; frequency 900 MHz; gain 22 dB; linearization technique; low-noise amplifier; noise figure 5.3 dB; second-order-intermodulation injection; size 0.18 mum; voltage 1.5 V; CMOS technology; Feedforward systems; Linearity; Linearization techniques; Low-noise amplifiers; Noise cancellation; Noise figure; Noise measurement; Noise reduction; Radio frequency; ${rm IIP}_{3}$ ; ${rm IM}_{3}$ cancellation; High linearity; RF front-end; intermodulation; linearization; low power;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2008.2004531
