Design of current-mode ladder filters using coupled-biquads

Author

Wu, Jie ; El-Masry, Ezz I.

Author_Institution

Dept. of Electr. & Comput. Eng., Dalhousie Univ., Halifax, NS, Canada

Volume

45

Issue

11

fYear

1998

fDate

11/1/1998 12:00:00 AM

Firstpage

1445

Lastpage

1454

Abstract

A new design approach for current-mode (CM) filters is presented. The proposed method is based on simulating RLC ladder networks using coupled-biquad structures. The loop-and branch-currents are used as variables to generate transfer functions. These functions are realized by CM circuits implementing multiple output CMOS OTA´s. The resulting CM structures use only grounded capacitors making them suitable for VLSI. To demonstrate the proposed approach, a low-pass and a band-pass ladder filter were designed and simulated using HSPICE

Keywords

SPICE; VLSI; band-pass filters; biquadratic filters; circuit CAD; circuit simulation; coupled circuits; current-mode circuits; ladder filters; low-pass filters; operational amplifiers; transfer functions; HSPICE; RLC ladder network simulation; VLSI; band-pass filter; coupled-biquads; current-mode ladder filters; grounded capacitors; loop-and-branch currents; low-pass filter; multiple output CMOS OTAs; transfer functions; Active filters; Band pass filters; Capacitors; Circuit simulation; Design methodology; Impedance; RLC circuits; Transfer functions; Virtual prototyping; Voltage;

fLanguage

English

Journal_Title

Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1057-7130

Type

jour

DOI

10.1109/82.735356

Filename

735356