Patent ID: 9097592
Filing Date: 2015-08-04
Classification: G01K

Abstract:
1. A sensing device, comprising: circuitry configured to apply a voltage to a thermistor; a first sense resistor; a first current mirror configured to mirror a first current flowing through the thermistor through said first sense resistor; circuitry configured to apply said voltage to a reference resistor; a second sense resistor; a second current mirror configured to mirror a second current flowing through the reference resistor through said second sense resistor; a comparator configured to compare voltages on said first and second sense resistors to generate a comparison signal; and output circuitry configured to receive the comparison signal and to generate an output signal representative of a difference between a temperature of an environment of the thermistor and a reference temperature, wherein a mirroring ratio of the second current mirror is configured to vary based on the output signal.