The diagnostic circuit comprises a comparator having a first input connected to the power device and a second input connected to a reference voltage generator. A signal generator is connected to the output of comparator so as to generate a diagnostic signal when comparator detects a current in the power...http://www.google.fr/patents/US5008771?utm_source=gb-gplus-shareBrevet US5008771 - Diagnostic circuit for units providing current control and protection against excessive heat dissipation for semiconductor power devices
Diagnostic circuit for units providing current control and protection ...