Cell biasing and balancing in E-cell based single-ended log filters

Sergio Callegari, Gianluca Setti

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations


Log domain (or instantaneous companding) filtering is a recent appealing paradigm for designing integrable, high-frequency, low-voltage, continuous-time filters. A nonlinear transconductor known as E-cell is the single building block needed for realizing filters of any complexity. Nevertheless, the problem of biasing all the E-cells at proper DC operating points has not yet been systematically solved. Aim of this contribution is to address this topic and to propose a generally applicable mapping which systematically provides proper bias levels. Furthermore, the proposed mapping balances the E-cell branch currents at the DC operating point, allowing overall improved operation.
Original languageEnglish (US)
Title of host publicationProceedings of the IEEE International Conference on Electronics, Circuits, and Systems
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages4
ISBN (Print)0780350081
StatePublished - Jan 1 1998
Externally publishedYes


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