Precision human body temperature measurement based on thermistor sensor
An analog front end, with a new temperature calibration method, for an accurate temperature measurement of a human body has been presented. The discussed AFE consists of a current reference, a precision current source, a programmable gain amplifier, a voltage source proportional to absolute temperature and on chip temperature calibration resistor. Human body temperature can be measured in the range from +25 degC to +45 degC at the operating temperature of an IC in the range from 40 degC to +125 degC with 0.1 degC precision. The presented analog front end consumes no more than 180 uW and was designed in UMC CMOS 130 nm technology.
2016 IEEE 19th International Symposium on Design and Diagnostics of Electronic Circuits Systems (DDECS)