Oscillation-Based Test in OTA-C filters: A case study

Abstract

In this work, we explore the ability of OscillationBased Test (OBT) for testing OTA-C filters. Adopting a secondorder band pass filter as a case study, we present a scheme that uses a non linear characteristic in the feedback loop. The effectiveness of the strategy is qualified by means of fault simulation.

On Oscillation Based filter testing

“…For example for a band-pass filter harmonic terms will appear in the oscillation frequency due to the finite quality factor. Knowing these, adaptations of active filters has been implemented, verified and exhaustively discussed in [14] - [16].…”