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A novel switched capacitor frequency tuning technique for continuous-time Gm-C filters

 

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Opened Access A novel switched capacitor frequency tuning technique for continuous-time Gm-C filters
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Author: Sánchez Rodríguez, Trinidad
Muñoz Chavero, Fernando
Torralba Silgado, Antonio Jesús
González Carvajal, Ramón
Department: Universidad de Sevilla. Departamento de Ingeniería Electrónica
Date: 2009
Published in: XXIV Conference on Design of Circuits and Integrated Systems: Zaragoza, 18-20 de noviembre 2009
Document type: Presentation
Abstract: A novel approach for the automatic frequency tuning of Continuous Time Filters is presented. This approach is based on a switched capacitor circuit and only needs three capacitors, some switches and a replica transconductor to adjust the pole frequency of the filter. Despite the simplicity of the scheme, the accuracy of the proposed system is under 1% of frequency error. To evaluate the idea a version of the circuit has been designed in a 0.5 µm CMOS technology with a 3.3 V power supply and simulation results are provided.
Size: 163.9Kb
Format: PDF

URI: http://hdl.handle.net/11441/23450

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