Patent ID: 8371749
Filing Date: 2013-02-12
Classification: G01K

Abstract:
1. A temperature sensor comprising: a compare subject voltage output unit for outputting a reference voltage having a constant value irrespective of a change of an external temperature and a third temperature voltage that decreases in response to an increase of an external temperature; a temperature range decision unit for comparing the reference voltage and the third temperature voltage and outputting an enable signal, wherein the enable signal indicates whether the external temperature is higher or lower than a predetermined temperature; and a temperature signal output unit having a plurality of high temperature outputs and a plurality of low temperature outputs, each of the high temperature outputs corresponding to a specific high temperature signal of corresponding plurality of high temperature signals and each of the low temperature outputs corresponding to a specific low temperature signal of a corresponding plurality of low temperature signals, the temperature signal output unit outputting one of the high and low temperature signals in response to the enable signal, wherein each of the high and low temperature signals are indicative of whether the external temperature lies in a high temperature range or in a low temperature range, respectively, wherein the temperature range decision unit is connected to the high and low temperature outputs and modifies the third temperature voltage in response to the temperature signal outputted by the temperature signal output unit.