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Fault-tolerant A/D converter using analogue voting

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3 Author(s)
Askari, S. ; Center for Integrated Circuits & Syst., Univ. of Texas at Dallas, Richardson, TX, USA ; Nourani, M. ; Namazi, A.

Analogue and digital circuits are both prone to failure because of device degradations, transient upsets and large parametric variations. Redundancy techniques, such as N-tuple modular redundancy, have been widely used to correct faulty behaviour of components and achieve high reliability for digital circuits. In this study, the authors propose a redundancy based fault-tolerant methodology for analogue circuits. In particular, the authors focus on highly reliable analogue-to-digital converter, which is a critical component in many mixed-signal systems. The authors methodology employs redundant analogue blocks and chooses the best result using an innovative analogue voter. Simulation results are reported to verify the concepts, measure the system's reliability and trade off reliability against cost and power.

Published in:

Circuits, Devices & Systems, IET  (Volume:5 ,  Issue: 6 )