Patent ID: 6133616
Filing Date: 2000-10-17
Classification: G01K,H01L

Abstract:
A temperature sensor for a MOSgated device; said MOSgated device having a semiconductor die which has first and second power electrodes and a gate electrode for controlling conduction between said first and second power electrodes; said temperature sensor comprising at least one diode junction which said first and second terminals on opposite sides of a P/N junction and which is thermally coupled to said die where by said at least one diode junction is at substantially the same temperature as said die and a current source for causing a fixed current flow in the forward conduction direction of said P/N junction; a first and a second intentional capacitor; said first intentional capacitor coupling said first P/N junction terminal to said first power electrode; said second intentional capacitor being connected across said first and second terminals of said P/N junction; whereby electrical noise at said first power electrode is isolated from the forward voltage drop across said P/N junction which forward drop is caused by forward current through said P/N junction from said current source.