DocumentCode :
349781
Title :
Cell biasing and balancing in E-cell based single-ended log filters
Author :
Callegari, Sergio ; Setti, Gianluca
Author_Institution :
Dipt. di Elettronica Inf. e Sistemistica, Bologna Univ., Italy
Volume :
2
fYear :
1998
fDate :
1998
Firstpage :
377
Abstract :
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
Keywords :
continuous time filters; low-power electronics; nonlinear filters; state-space methods; DC operating point; E-cell; cell balancing; cell biasing; high-frequency low-voltage continuous-time filter; instantaneous companding filtering; log domain filtering; nonlinear transconductor; single-ended log filter; state space mapping; Costs; Electronic mail; Filtering; Hearing aids; Nonlinear filters; Operational amplifiers; State-space methods; Transconductors; Tunable circuits and devices; Voltage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electronics, Circuits and Systems, 1998 IEEE International Conference on
Conference_Location :
Lisboa
Print_ISBN :
0-7803-5008-1
Type :
conf
DOI :
10.1109/ICECS.1998.814903
Filename :
814903
Link To Document :
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