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Stability properties of some RC active realisations

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2 Author(s)
Mikhael, W.B. ; Sir George Williams University, Department of Electrical Engineering, Montreal, Canada ; Bhattacharyya, B.B.

Some stability properties of a recently reported minimal-capacitor low-sensitivity RC active realisation of voltage transfer functions are investigated. It is shown that the realisation can attain a low-frequency unstable mode of operation. Five new circuits are derived from the original, using the theory of singular elements. Only two of these circuits are shown to be free from low-frequency unstable modes. The two new stable structures retain all the attractive features of the original realisation.

Published in:

Electronics Letters  (Volume:8 ,  Issue: 11 )