Patent ID: 9588170
Date: 2017-03-07
CPC Classifications: G01R,H01L,H03K

Claim:
1. A saturation edge detection circuit for testing a saturation level in an insulated gate bipolar transistor (“IGBT”), the circuit comprising: a first input operable to receive an on signal; a second input coupled to an IGBT driver circuit; and an output coupled to a control electrode of the IGBT, the output operable to indicate a change in a state of a saturation voltage associated with the IGBT during operation of the IGBT; a first latch having a first input coupled to a supply voltage and a second input coupled to an output of a comparator, the comparator being part of the IGBT driver circuit; a second latch having a first input coupled to an output of the first latch, and a second input operable to receive a delayed on signal.