| 摘要 |
A temperature sensor circuit in accordance with an embodiment of the present invention includes 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 includes 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, 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. The temperature sensor circuit also includes 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 to 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.
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