Nth-order current transfer function synthesis using DVCCs: signal-flow graph approach

A general synthesis method for the realisation of nth-order current transfer function is derived from signal-flow graph. From the proposed method, a novel configuration of nth-order current-mode universal filter using differential voltage current conveyors (DVCCs) and multiple outputs DVCC (MODVCC)...

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Bibliographic Details
Published in:International journal of electronics 2013-04, Vol.100 (4), p.482-496
Main Authors: Jiang, Jinguang, Zhou, Xifeng, Xu, Weilin
Format: Article
Language:English
Subjects:
Circuits
CMOS
current-mode
DVCC
Electric currents
Electrical equipment
Electronics
filter
Graphs
MODVCC
Signal processing
signal-flow graph
Simulation
Synthesis
Transfer functions
Voltage
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Description
Summary:A general synthesis method for the realisation of nth-order current transfer function is derived from signal-flow graph. From the proposed method, a novel configuration of nth-order current-mode universal filter using differential voltage current conveyors (DVCCs) and multiple outputs DVCC (MODVCC) is obtained. The number of active elements in the configuration is reduced to n + 1, which is a significant reduction in comparison with the previously reported methods. The proposed circuits employ the features of multifunctional, smallest number elements, simple in structure, easy to be cascaded and convenient for integration. As examples, a biquadratic filter and other four different orders filters are realised in 0.18 µm CMOS process. Simulation results are given to demonstrate the effectiveness of the schemes. The simulation results are found to be in good agreement with the theory.
ISSN:0020-7217
1362-3060
DOI:10.1080/00207217.2012.713019