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Realization of nth-order transfer functions using current conveyors

✍ Scribed by Fuat Anday; Ece Olcay Gunes

Publisher
John Wiley and Sons
Year
1992
Tongue
English
Weight
160 KB
Volume
20
Category
Article
ISSN
0098-9886

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✦ Synopsis

A number of current conveyor (CCII) active first-and second-order filter circuits have appeared in the literature. '-" However, little work has been done'"I2 on the realization of nth-order filters using CCII.

In this work the signal flow graph procedure is applied to the design of nth-order voltage transfer functions, and a general nth-order circuit with the element values expressed in terms of the nth-order transfer function coefficients is proposed.

Consider the subnetwork shown in Figure l(a). Using the defining equation for the second-generation current conveyor, l 3 it can be shown that the subgraph in Figure l(b) corresponds to the subnetwork in

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LE'ITERS TO THE EDITOR and W I&) =exp ( x cos ot) cos not dot 2 1 -\* is the modified Bessel function of the first kind. It must be noted that, in practice, the amplitude can be controlled by R1. In the experimental circuit the different component values are, R =2.7 k, Rc=27 k, RE= 100 k, R1 = 5 k,