Title :
Low voltage LC-ladder Gm-C low-pass filters with 42-215 MHz tunable range
Author :
Otin, Aránzazu ; Aldea, Concepción ; Celma, Santiago
Author_Institution :
Dept. of Electron. & Commun. Eng., Zaragoza Univ., Spain
fDate :
28 Aug.-2 Sept. 2005
Abstract :
In this paper we report 3rd-order Gm-C filters based on fully-balanced pseudo-differential continuous-time transconductors for applications in low-voltage systems over VHF range. By using a 0.35 μm standard CMOS process, two low-pass filter approximations (Butterworth and Elliptic) have been implemented with a cut-off frequency programmability from 42 to 215 MHz, which confirm the feasibility of the proposed strategy in applications such as data storage systems and IF strips. The filters consume less than 3.8 mW from a 2 V supply. The measured dynamic range was 53 dB at THD of 1%. The estimated active area of the filter is 0.074 mm2.
Keywords :
Butterworth filters; CMOS integrated circuits; UHF filters; VHF filters; conductors (electric); continuous time filters; disc drives; elliptic filters; ladder filters; low-pass filters; low-power electronics; programmable circuits; 0.35 micron; 2 V; 3.8 MW; 42 to 215 MHz; Butterworth filters; CMOS process; Gm-C low-pass filters; VHF range; cut-off frequency programmability; data storage system; elliptic filters; low voltage LC-ladder filters; pseudo-differential continuous-time transconductors; CMOS process; CMOS technology; Digital filters; Dynamic range; Frequency; Low pass filters; Low voltage; Power harmonic filters; Transconductors; VHF circuits;
Conference_Titel :
Circuit Theory and Design, 2005. Proceedings of the 2005 European Conference on
Print_ISBN :
0-7803-9066-0
DOI :
10.1109/ECCTD.2005.1522956
