R. Eskandari - Faculty of Electrical Engineering, Sahand University of Technology, Tabriz, Iran
A. Ebrahimi - Faculty of Electrical Engineering, Sahand University of Technology, Tabriz, Iran
H. Faraji - Faculty of Electrical Engineering, Sahand University of Technology, Tabriz, Iran

An area-efficient wideband receiver front-end for multi-standard receivers is presented. To handle large input signal levels, dual gain modes are employed in the LNA stage. For input signals lower than -۱۷.۵ dBm, a noise-canceling balun CG-CS LNA is employed. The LNA features a local feedback loop to reduce power consumption. For input signals in the range of from -۱۷.۵ to -۵.۲ dBm, the CG-CS LNA is bypassed with a balun unit-gain inverter stage. The proposed front-end shows better than -۱۲ dB input matching for both gain modes in the frequency range of ۰.۴-۳.۴ GHz. Due to the lack of off-chip balun, the proposed front-end consumes low area. Moreover, the full differential structure leads to enhanced linearity performance. The post-layout simulation results in RF CMOS ۰.۱۸ µm process shows the conversion gain of ۲۴.۵/۱۳.۰۶ dB in HG/LG modes. The minimum DSB NF is ۳.۷۷/۹.۸۴ dB, and the third input intercept point (IIP۳) is -۷.۲۹/-۱.۸ dBm. The circuit dissipates ۱۲.۹۳ mW with an active area of ۰.۰۷۳ mm۲.

receiver front-end, balun LNA, low area, noise-canceling, wideband, inductor less