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A systematic design procedure for square-root-domain circuits based on the signal flow graph approach

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2 Author(s)
Psychalinos, C. ; Phys. Dept., Aristotle Univ. of Thessaloniki, Greece ; Vlassis, S.

A new systematic design procedure for square-root-domain (√x-domain) circuits, which is based on the signal flow graph (SFG) synthesis approach, is introduced in this paper. The SFG of the prototype system is modified, using a proposed set of operators, in such a way that √x-domain building blocks could be used for the corresponding implementations. For this purpose, new √x-domain integrator circuits have been proposed which were constructed from new current-mode geometric-mean and multiplier/divider circuits. The main advantages of the proposed circuits are the accuracy due to immunity to the body effect, low circuit complexity and potential for low-voltage operation. As an example, a fifth-order Chebyshev low-pass filter was designed using the proposed technique. Simulation results confirm the validity of the proposed design technique and the high performance of the proposed circuits.

Published in:

Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on  (Volume:49 ,  Issue: 12 )

Date of Publication:

Dec 2002

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