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

Volume

1

fYear

2005

fDate

28 Aug.-2 Sept. 2005

Abstract

In this paper we report 3^rd-order G_m-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;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuit Theory and Design, 2005. Proceedings of the 2005 European Conference on

Print_ISBN

0-7803-9066-0

Type

conf

DOI

10.1109/ECCTD.2005.1522956

Filename

1522956