Title :
0.18μ CMOS Gm-C digitally tuned filter for telecom receivers
Author :
D´Amico, Stefano ; Baschirotto, Andrea
Author_Institution :
Innovation Eng. Dept., Lecce Univ., Italy
Abstract :
The design of widely programmable low-pass second order Gm-C filter for telecom applications is presented. A digital tuning scheme is proposed for getting a frequency programmability range from 1 MHz to 40 MHz compensating the technological spread. The digital tuning circuitry can be turned off during signal processing. A 0.18 μm CMOS technology with a 1.8V power supply has been used for the filter design. A 62dB constant dynamic range is obtained for the filter programmability range by switching input transistors sizes and bias currents of each OTA of the filter.
Keywords :
CMOS analogue integrated circuits; active filters; circuit tuning; low-pass filters; operational amplifiers; programmable filters; radio receivers; 0.18 micron; 1 to 40 MHz; 1.8 V; CMOS Gm-C filter; OTA; digital tuning; dynamic range; frequency programmability; low-pass second-order filter; signal processing; telecom receiver; Capacitance; Circuit optimization; Cutoff frequency; Digital filters; MOSFETs; Mirrors; Quantization; Telecommunications; Transconductance; Tuning;
Conference_Titel :
Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on
Print_ISBN :
0-7803-7761-3
DOI :
10.1109/ISCAS.2003.1205608
