FAULT COVERAGE IMPROVEMENT OF LINEAR ANALOG CIRCUITS BASED ON ERROR SIGNAL ANALYSIS

Fault-tolerant design of analogue circuits is more difficult than that of digital circuits. Only a few fault-tolerant schemes for analogue c ircuits have been published. The continuous checksum-based technique i s a relatively new method for the design of fault-tolerant linear anal ogue circuits. It involves the use of an analogue checker to provide c oncurrent error detection. However, some faults in the passive element s cannot be detected if the checker has not been designed appropriatel y. This paper addresses the fault coverage issue in the continuous che cksum-based technique and proposes an error signal analysis based meth od for improving fault coverage of the checker. An example is given to highlight the contributions of this paper.