Title :
A current-mode FIR-filter-based receiver front-end for blocker filtering
Author :
Duksoo Kim ; Byungjoon Kim ; Junhyuk Choi ; Sangwook Nam
Author_Institution :
Sch. of Electr. Eng. & INMC, Seoul Nat. Univ., Seoul, South Korea
Abstract :
A digital RF receiver front-end employing a FIR(Finite Impulse Response) filter is proposed for SAW-less receiver architecture, where the large out-of-band interferer can be rejected selectively by using a scalable frequency response property of FIR filter. The FIR filter, followed by the transconductor stage and current-commutating passive mixer, operates in current domain to improve the linearity. Also, the clock generator circuit can be simplified by making the FIR filter operate with 8-phase clock signal. The designed receiver front-end is fabricated using UMC 0.13 μm CMOS process. The chip shows unwanted blocker rejection over 80 dB, with good linearity of +3.94 dB IIP3.
Keywords :
CMOS digital integrated circuits; FIR filters; current-mode circuits; frequency response; integrated circuit design; integrated circuit manufacture; integrated circuit technology; mixers (circuits); passive filters; radio receivers; signal generators; 8-phase clock signal generator circuit; SAW-less receiver architecture; UMC CMOS process; blocker filtering; current-commutating passive mixer; current-mode FIR-filter-based receiver front-end; digital RF receiver front-end; finite impulse response filter; out-of-band interferer; scalable frequency response property; size 0.13 mum; transconductor stage; Clocks; Finite impulse response filters; Frequency measurement; Microwave filters; Mixers; Radio frequency; Receivers; FIR filter; blocker filtering; digital RF; linearity; receiver front-end;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2013 Asia-Pacific
Conference_Location :
Seoul
DOI :
10.1109/APMC.2013.6694843
