Title :
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
fDate :
11/1/1998 12:00:00 AM
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;
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
