Title :
A 1.2V-21dBm OIP3 4th-order active-gm-RC reconfigurable (UMTS/WLAN) filter with on-chip tuning designed with an automatic tool
Author :
D´Amico, S. ; Giannini, V. ; Baschirotto, A.
Author_Institution :
Dept. of Innovation Eng., Lecce Univ., Italy
Abstract :
A 4th order low-pass continuous-time filter for a UMTS/WLAN receiver of a reconfigurable terminal is presented. The filter uses two active-gm-RC biquad cells, where a single opamp is used for two poles and its unity-gain-bandwidth is comparable to the filter cut-off frequency. Thus, the opamp power consumption is strongly reduced with other closed-loop filter configuration. 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 0.13μm CMOS technology occupies a 0.9mm2 area and consumes 3.4mW and 14.2mW for the UMTS and WLAN, respectively. The full chip has been designed using an automatic design tool and the experimental results agree with the expected performance.
Keywords :
3G mobile communication; CMOS integrated circuits; RC circuits; biquadratic filters; circuit tuning; continuous time filters; low-pass filters; operational amplifiers; radio receivers; wireless LAN; 0.13 micron; 1.2 V; 14.2 mW; 3.4 mW; CMOS technology; UMTS/WLAN receiver; active-RC biquad cells; automatic design tool; closed-loop filter configuration; continuous-time filter; cut-off frequency deviation; fourth order low-pass filter; on-chip tuning circuit; opamp power consumption; unity-gain-bandwidth; 3G mobile communication; Aging; CMOS technology; Circuits; Cutoff frequency; Energy consumption; Filters; Linearity; Temperature; Wireless LAN;
Conference_Titel :
Solid-State Circuits Conference, 2005. ESSCIRC 2005. Proceedings of the 31st European
Print_ISBN :
0-7803-9205-1
DOI :
10.1109/ESSCIR.2005.1541623
