Monitoring transistor degradation in power inverters through pole shifts

In a power inverter configuration with pull-up and pull-down transistors, ringing that occurs on the high-to-low and low-to-high transitions can be used to track aging and predict failures. As the transistors age or are damaged, changes in their equivalent resistance and capacitance can affect the frequency and damping factor of the characteristic ringing detected on the inverter´s output. The Matrix Pencil Method can be used to locate the poles associated with this ringing and detect shifts in position that indicate transistor degradation.