Digital Temperature Sensors and Calibration Thereo

专利名称：Digital Temperature Sensors and Calibration

Thereof

发明人：Michiel A.P. Pertijs,Johan H. Huijsing申请号：US11575303申请日：20050915

公开号：US20080069176A1公开日：20080320

专利附图：

摘要：A method for calibrating a digital temperature sensor circuit, the circuitcomprising an analogue temperature sensing means, an internal reference voltagesource and an analogue-to-digital converter (ADC). The ADC is arranged to receiverespective signals from the analogue temperature sensing means and the referencevoltage source and output a digital signal indicative of the ambient temperature. Themethod comprises the steps of determining the value of the internal reference voltageoutputted by the reference voltage source, comparing it with the desired referencevoltage value, and adjusting the reference voltage source in response to the result of thecomparison step. Such an electrical voltage mode calibration can significantly reduceproduction costs, as it can be performed much faster than a traditional thermalcalibration. The method can be applied to a sensor that produces a PTAT voltage that

has to be compared to a temperature-independent bandgap reference voltage.

申请人：Michiel A.P. Pertijs,Johan H. Huijsing

地址：Delft NL,Schipluiden NL

国籍：NL,NL

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