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Oscillation test strategy for analog filters by monitoring output voltage and supply current

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4 Author(s)
Hu, Geng ; Department of Automation, Tsinghua University, Beijing 100084, China ; Wang, Hong ; Hu, Mei ; Yang, Shiyuan

A test strategy for analog filters was proposed. The output voltage and supply current of the circuit were monitored when using the oscillation test technique. The frequency, average value, maximum value and amplitude of both output voltage and supply current were taken as test parameters. Tolerance bands of test parameters were analyzed. Fault detectabilities of test parameters were compared and combined, and optimal parameter sets were derived. Experimental results show that both the output voltage and supply current give significant contribution to fault detection. Considering catastrophic, single and double parametric faults, the fault coverage in testing the benchmark circuit can be raised from 90.60% for traditional voltageonly oscillation test strategy to 97.2% by monitoring both output voltage and current parameters.

Published in:

Tsinghua Science and Technology  (Volume:12 ,  Issue: S1 )

Date of Publication:

July 2007

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