Title :
Synthesis of follow-the-leader feedback log-domain filters
Author :
Wu, Jie ; El-Masry, Ezz I.
Author_Institution :
Dept. of Electr. & Comput. Eng., Dalhousie Univ., Halifax, NS, Canada
Abstract :
A systematic approach for the design of log-domain filters is presented. The filters´ structures are based on the inverse-follow-the-leader-feedback (IFLF) topology, therefore, they possess low sensitivity. To illustrate the proposed approach, seventh-order linear phase lowpass filters with tunable cutoff frequencies range from 100 kHz to 60 MHz are designed and simulated. Simulations´ results indicate that the filters provide a tunable bandwidth (f-3dB) that extends from 100 kHz to 200 MHz, equalization up to 16 dB and 14 dB, power dissipation of 7 mW and 12 mW for the single-ended and the balanced versions; respectively
Keywords :
active filters; circuit feedback; current-mode circuits; linear phase filters; low-pass filters; network synthesis; 100 kHz to 200 MHz; 100 kHz to 60 MHz; 12 mW; 7 mW; current-mode circuit; inverse-follow-the-leader feedback topology; linear phase low-pass filter; log-domain filter; network synthesis; Bandwidth; Circuit topology; Dynamic range; Feedback; Frequency; Impedance; Nonlinear filters; Signal processing; Tunable circuits and devices; Voltage;
Conference_Titel :
Electronics, Circuits and Systems, 1998 IEEE International Conference on
Conference_Location :
Lisboa
Print_ISBN :
0-7803-5008-1
DOI :
10.1109/ICECS.1998.814904
