Capacitance spread reduction technique for low-cost switched-capacitor filters implementation

Capacitance spread reduction technique for low-cost switched-capacitor filters implementation

This paper proposes a technique to reduce capacitance spread in switched-capacitor filters. The proposed technique is based on a simple charge distribution and a partial charge transfer techniques, and is applicable to various integrator topologies. Simulation results show that the proposed techniqu...

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Bibliographic Details
Published in:2009 European Conference on Circuit Theory and Design pp. 37 - 40
Main Authors: Retdian, Nicodimus, Takagi, Katsuyuki, Takagi, Shigetaka
Format: Conference Proceeding
Language:English
Published: IEEE 01-08-2009
Subjects:
Active filters
Capacitors
Clocks
Communication switching
Cutoff frequency
Low pass filters
Parasitic capacitance
Passive filters
Topology
Transfer functions
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Summary:This paper proposes a technique to reduce capacitance spread in switched-capacitor filters. The proposed technique is based on a simple charge distribution and a partial charge transfer techniques, and is applicable to various integrator topologies. Simulation results show that the proposed technique reduces the total capacitance by 70%, which is a significant reduction of filter area. Furthermore, an integrator implemented by the proposed technique is found to be insensitive to parasitic capacitances.
DOI:10.1109/ECCTD.2009.5275138