Patent ID: 8624661

Claim:
An apparatus for generating an electrical current having a non-linear relationship to temperature, the apparatus comprising: a first current generator having a first current which is directly proportional to the quadratic of absolute temperature; a first multiplier that is coupled to the first current generator so as to receive the first current and that receives a first control signal, wherein the amplitude of the first current is modified by the first control signal so as to generate a first modified current; a second current generator having a second current which is complementary to the quadratic of absolute temperature; a second multiplier that is coupled to the second current generator so as to receive the second current and that receives a second control signal, wherein the amplitude of the second current is modified by the second control signal so as to generate a second modified current; and a current summing node that is coupled to the first multiplier and the second multiplier, wherein the current summing node outputs the sum of the first and second modified currents.