Title :
A 4th-order active-G/sub m/-RC reconfigurable (UMTS/WLAN) filter
Author :
D´Amico, Stefano ; Giannini, Vito ; Baschirotto, Andrea
Author_Institution :
Dept. of Innovation Eng., Lecce Univ.
fDate :
7/1/2006 12:00:00 AM
Abstract :
A fourth-order low-pass continuous-time filter for a UMTS/WLAN receiver of a reconfigurable terminal is presented. The filter uses the cascade of two Active-Gm-RC biquad cells. A single opamp is used for each biquad and its unity-gain-bandwidth is comparable to the filter cut-off frequency. Thus, the opamp power consumption is strongly reduced w.r.t. other closed-loop filter configurations. The cut-off frequency deviation due to the technological spread, aging and temperature variation is adjusted by an on-chip tuning circuit. The device in a 0.13 mum CMOS technology occupies a 0.9 mm2 area and it consumes 3.4 mW and 11 4.2 mW for the UMTS and WLAN, respectively. The full chip has been designed using an automatic design tool, which is validated by the agreement between the experimental results and the expected performance
Keywords :
3G mobile communication; CMOS integrated circuits; biquadratic filters; circuit tuning; continuous time filters; low-pass filters; wireless LAN; 0.13 micron; 114.2 mW; 3.4 mW; CMOS technology; UMTS receiver; WLAN receiver; automatic design tool; closed-loop filter configurations; continuous-time filter; fourth-order low-pass filter; reconfigurable receiver; single opamp; tuning circuit; 3G mobile communication; Active filters; Aging; Baseband; CMOS technology; Cutoff frequency; Energy consumption; Linearity; Temperature; Wireless LAN; Analog filter; UMTS; WLAN; reconfigurable receiver;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2006.873676
