Patent ID: 8093925
Filing Date: 2012-01-10
Classification: B60R,G05F

Abstract:
1. An apparatus comprising: a first terminal; a second terminal; a first resistor that is coupled to the first terminal, wherein the first resistor includes a first set of metal resistors coupled in parallel with one another; a second resistor that is coupled to the first terminal, wherein the second resistor includes a second set of metal resistors coupled in series with one another, wherein each metal resistor from each of the first and second sets of metal resistors has substantially the same temperature coefficient; a current source that is coupled to the second resistor; an amplifier having inputs and an output, wherein the inputs of the amplifier are coupled to each of the first and second resistors; and a transistor having a first passive electrode, a second passive electrode, and a control electrode, wherein the first passive electrode is coupled to the first resistor, and wherein the second passive electrode is coupled to the second terminal, and wherein the control electrode is coupled to the output of the amplifier.