Patent ID: 8783949
Filing Date: 2014-07-22
Classification: G01K

Abstract:
1. A temperature sensor circuit, comprising: a current reference circuit coupled to a pair of current sources having a ratio of geometries between them, the current reference circuit configured to provide a first reference current and a second reference current, where the first reference current is larger than the second reference current by an amount determined by the ratio of geometries, wherein the current reference circuit comprises: a differential sensing path circuit coupled to the current reference circuit, the differential sensing path circuit including at least one pair of oppositely-sized bipolar transistors or diodes, the differential sensing path circuit configured to bias a first bipolar transistor or diode with the first reference current and to bias a second bipolar transistor or diode with the second reference current, where the first bipolar transistor or diode has a smaller cross-sectional area than a cross-sectional area of the second bipolar transistor or diode.