Final answer:
To detect avalanche breakdown in a diode, monitor for a sudden increase in current at a specific reverse bias voltage using a curve-tracing analysis or a source-measure unit, and keep an eye on the temperature as it can affect breakdown voltage.
Step-by-step explanation:
To detect avalanche breakdown in a diode, you must monitor the diode’s operating conditions closely, specifically its voltage and current characteristics. The key indicator of avalanche breakdown is a sudden increase in current flow through the diode at a particular reverse bias voltage, known as the breakdown voltage. To detect this, you can carry out a reverse bias test using a source-measure unit (SMU) or perform a curve-tracing analysis, where you gradually increase the reverse voltage until the characteristic sharp increase in current is observed, indicating the onset of avalanche breakdown.
It is also important to monitor the temperature of the diode because thermal factors can influence the breakdown voltage and the occurrence of avalanche breakdown. Sophisticated diagnostic tools like Oscilloscopes can be used to detect any rapid changes in current or shifts in the diode’s operating conditions that may suggest a breakdown event.