Title :
A fully differential CMOS integrated 4th order reconfigurable GM-C lowpass filter for mobile communication
Author :
Stehr, Uwe ; Henkel, Frank ; Dallüge, Lutz ; Waldow, Peter
Author_Institution :
IMST GmbH, Kamp-Lintfort, Germany
Abstract :
A fully reconfigurable channel select filter is presented which is used as a part of a multi mode direct conversion receiver. The filter supports different modes including GSM, IS-95, and UMTS. A 4th order Butterworth filter is realized in a gn C filter topology. The filter circuit is implemented in a standard 0.35 μm CMOS process. The filter is able to handle large input signals up to 600mVpp at a supply voltage of 2.7V. The circuit has a low current consumption of 620μA, whereas the needed die size is only 530520μm.
Keywords :
3G mobile communication; CMOS analogue integrated circuits; biquadratic filters; cellular radio; circuit feedback; circuit tuning; low-pass filters; transceivers; 2.7 V; Butterworth filter; GM-C lowpass filter; GSM; IS-95; OTA circuits; UMTS; WCDMA; bias circuit; biquad circuit realization; common-mode feedback circuit; fourth-order filter; fully differential CMOS integrated filter; mobile communication; multimode direct conversion receiver; reconfigurable channel select filter; tuning range; 3G mobile communication; Band pass filters; Circuit topology; Communication standards; Frequency; GSM; Low pass filters; Mobile communication; Multiaccess communication; Voltage;
Conference_Titel :
Electronics, Circuits and Systems, 2003. ICECS 2003. Proceedings of the 2003 10th IEEE International Conference on
Print_ISBN :
0-7803-8163-7
DOI :
10.1109/ICECS.2003.1301997
