Patent ID: 9261415
Filing Date: 2016-02-16
CPC Classification: G01K,G05F

Claim Text:
1. A temperature sensor comprising: a proportional to absolute temperature (PTAT) current generator comprising a first current output configured to provide a first temperature dependent current; a first curvature compensation circuit configured to provide a first compensating current to an internal node of the PTAT current generator, wherein the first compensating current comprises a first non-linearity with respect to temperature, and a portion of the first non-linearity is present in the first temperature dependent current; and a second curvature compensation circuit configured to add a second compensating current to the first current output, the second compensating current comprising a second non-linearity with respect to temperature, wherein the second non-linearity in the second compensating current substantially cancels out the first non-linearity in the first temperature dependent current.