OBT implementation on an OTA-C band-pass filter

Pablo Petrashin1,  Eduardo Romero2,  Gabriela Peretti2
1Universidad Católica de Córdoba, 2Universidad Tecnologica Nacional


In this work, we explore the ability of OBT for testing OTA-C filters with a more complex OTA configuration than in previously reported one. Adopting a second-order structure as a case study, we use of a non-linear block in the feedback loop in order to force the oscillations. The evaluation of the test quality is made by fault simulation. The simulation results shows that the filter present very good fault coverage values.