A 1.8 TO 4 GHZ RECEIVER FRONT-END WITH 250 MHZ BASEBAND BANDWIDTH FOR ADVANCED CELLULAR APPLICATIONS

Abstract

This paper presents a wide-band inductor-less receiver front-end with wide baseband bandwidth. A direct conversion receiver based on this structure is appropriate for a fifth-generation (5G) receiver or other wireless systems. The broadband receiver front-end includes a low-noise amplifier (LNA), a passive mixer, and a wide-band transimpedance amplifier (TIA). The LNA employs a complementary current-reuse common source amplifier combined with a low-current active feedback to achieve simultaneously low noise and high linearity. A current-reuse self-biasing TIA is proposed to obtain wide-band and quite-linear. The proposed receiver front-end is implemented in 28 nm CMOS process. It has a RF bandwidth of 2.2 GHz and a baseband bandwidth (BBBW) of 250 MHz. The noise figure (NF) is 5.5 dB and the conversion gain is larger than 15.9 dB with passband variations under 0.7 dB in BBBW of 250 MHz. The third-order input intercept point (IIP3) is 3 dBm at 2.3 GHz, whereas it consumes 75.2 mW at a 0.9-V supply and has an area of 0.053 mm².