Patent ID: 7443176

Claim:
An integrated circuit temperature sensor, comprising: a scaling circuit operable to scale a voltage across the base-emitter of a bipolar transistor of the integrated circuit and a delta voltage across the base-emitter of a bipolar transistor of the integrated circuit to lie within a voltage reference range less than a supply voltage when the sensor is exposed to a temperature within an expected operating temperature range; a first multiplexer having first and second inputs coupled to receive the scaled voltage across the base-emitter of the bipolar transistor of the integrated circuit and the scaled delta voltage across the base-emitter of the bipolar transistor of the integrated circuit, the first multiplexer selecting one of the scaled voltages at the first and second inputs for output responsive to a mode signal; and a comparator operable to compare the voltage output from the first multiplexer against a reference voltage and generate an output signal responsive thereto.