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A Method of Transformation from Symbolic Transfer Function to Active-RC Circuit by Admittance Matrix Expansion

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1 Author(s)
Haigh, D.G. ; Dept. of Electr. & Electron. Eng., Imperial Coll., London

Active-RC circuits containing 2-terminal linear passive elements and ideal transistors or operational amplifiers are derived from symbolic voltage or current transfer functions by admittance matrix transformations without any prior assumption concerning circuit architecture or topology. Since the method is a reversal of symbolic circuit analysis by Gaussian elimination applied to a circuit nodal admittance matrix, it can generate all circuits using the specified elements that possess a given symbolic transfer function. The method is useful for synthesis of low-order circuits, such as those used for cascade implementation, for deriving alternative circuits with the same transfer function as an existing circuit or for realizing unusual transfer functions, as may arise, for example, where a transfer function is required that contains specific tuning parameters

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Circuits and Systems I: Regular Papers, IEEE Transactions on  (Volume:53 ,  Issue: 12 )