Patent ID: 7914205

Claim:
A temperature sensor circuit comprising: a temperature sensing element operable to provide a temperature voltage that is linearly related to the absolute temperature of the circuit, the temperature sensing element comprising: a first bi-polar junction transistor and a second bipolar junction transistor connected between a supply voltage and a common ground, wherein the base of first bipolar junction transistor is connected to the base of the second bipolar junction transistor each bipolar junction transistor; a first resistor connected between an emitter of the first bipolar junction transistor and the common ground; and a second resistor connected between the common ground and a first node, wherein the temperature voltage is provided to the first node across the second resistor; a current supply element operable to supply a common current to a collector of the first bipolar junction transistor, the second bipolar junction transistor and the second resistor, respectively; an early voltage element operable to compensate for variations in voltage; a base current element operable to provide a steady base current to the bases of the first and second bipolar junction transistors; a channel modulation element operable to compensate for channel modulation; and a leakage element operable to compensate for epi-substrate leakage between the circuit and a substrate on which it is formed.