Title :
A new approach of design of current-mode filters
Author :
Wu, Jie ; El-Masry, Ezz I.
Author_Institution :
Dept. of Electr. Eng., Tech. Univ. Nova Scotia, Halifax, NS, Canada
Abstract :
A new design approach of current-mode ( CM) filters is presented. The proposed method is based on simulating the RLC ladder networks using coupled-biquad structures. The loop and branch currents are used as variables to generate coupled-biquad transfer functions that are realized by CM circuits implementing OTAs with multiple outputs. Design of low-pass, band-pass, and high-pass filters with all-pole and elliptic responses are presented. The resulting CM structures only use grounded capacitors making it suitable for VLSI. To illustrate this approach, the implementation of a OTA-based 5th-order all-pole low-pass current-mode filter is designed and simulated in HSPICE
Keywords :
SPICE; VLSI; band-pass filters; biquadratic filters; circuit analysis computing; digital simulation; elliptic filters; high-pass filters; low-pass filters; operational amplifiers; HSPICE simulation; OTAs; RLC ladder network simulation; VLSI; all-pole response; band-pass filters; branch currents; coupled-biquad structures; current-mode filters; elliptic response; grounded capacitors; high-pass filters; loop currents; low-pass filters; multiple outputs; Active filters; Band pass filters; Capacitors; Circuit simulation; Coupling circuits; Equations; Low pass filters; Prototypes; RLC circuits; Transfer functions;
Conference_Titel :
Circuits and Systems, 1997. ISCAS '97., Proceedings of 1997 IEEE International Symposium on
Print_ISBN :
0-7803-3583-X
DOI :
10.1109/ISCAS.1997.608721
