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Consideration of Integrated Low-Frequency Low-Pass Notch Filter Employing CCII Based Capacitance Multipliers

Fujihiko MATSUMOTO, Hinano OHTSU

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Summary :

In a field of biomedical engineering, not only low-pass filters for high frequency elimination but also notch filters for suppressing powerline interference are necessary to process low-frequency biosignals. For integration of low-frequency filters, chip implementation of large capacitances is major difficulty. As methods to enhance capacitances with small chip area, use of capacitance multipliers is effective. This letter describes design consideration of integrated low-frequency low-pass notch filter employing capacitance multipliers. Two main points are presented. Firstly, a new floating capacitance multiplier is proposed. Secondly, a technique to reduce the number of capacitance multipliers is proposed. By this technique, power consumption is reduced. The proposed techniques are applied a 3rd order low-pass notch filter. Simulation results show the effectiveness of the proposed techniques.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E107-A No.1 pp.114-118
Publication Date
2024/01/01
Publicized
2023/07/19
Online ISSN
1745-1337
DOI
10.1587/transfun.2023KEL0001
Type of Manuscript
Special Section LETTER (Special Section on Circuits and Systems)
Category

Authors

Fujihiko MATSUMOTO
  National Defense Academy
Hinano OHTSU
  National Defense Academy

Keyword