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Synthesis of log-domain filter with well-defined operating point
Zhan Xu; El-Masry, E.I.;
Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on
Volume 1,
23-26 May 2004
Page(s):I
-
1000-3 Vol.1
Abstract:
A new systematic approach for the design of nth order log-domain filters is presented. By eliminating the bias uncertainty, proper working condition is guaranteed for log-domain CMOS realization. This approach is based on the inverse-follow-the-leader-feedback (IFLF) topology and DC negative feedbacks are introduced to define the bias condition. To illustrate the proposed approach, a fourth order low-pass filter is designed and simulated in HSPICE.
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