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A predictive oscillation-based test (POBT) strategy, combined with supply current monitoring, is proposed as an alternative to the specification-based test of analog circuits. According to our simulation results, the combination of both techniques is excellent in predicting the main performance parameters of a CMOS operational amplifier (OpAmp) (dc gain, bandwidth, and slew rate) from test observables...
Two different CMOS circuits has been used to check the predictive oscillation based test (POBT) approach, combined with supply current monitoring technique. These circuits are a two stage op amp and a biquad filter composed by two transconductance amplifiers (OTA). The combination of both techniques has given excellent results in predicting the main performance parameters of the circuits as DC gain,...
In this paper we present a new tool to improve analog circuits test. This tool is based on measuring not only frequency or voltage, but also the transferred charge during a period while the circuit under test is configured as an oscillator. To prove the technique, fault diagnosis and parameter prediction have been tried. Simulations have been performed on an opamp considering process variations in...
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