Patent ID: 8878598
Filing Date: 2014-11-04
Classification: G05F

Abstract:
1. A sensing module, comprising: a sensing device, comprising a first output node, a second output node, a first reference terminal and a second reference terminal, for generating a sensing signal based on received pressure, wherein there is an equivalent impedance between the first reference terminal and the second reference terminal, and the sensing signal is a voltage difference between the first output node and the second output node; a voltage generating device, for generating a reference voltage signal; a compensating device, coupled between the second reference terminal and a voltage reference terminal; and a voltage controlling device, respectively coupled to the first reference terminal, the second reference terminal, and the voltage generating device, for outputting a first voltage signal to the first reference terminal based on the reference voltage signal and a cross voltage of the compensating device; wherein a sensitivity of the sensing device is a first function of temperature, the equivalent impedance is a second function of temperature, an impedance of the compensating device is a third function of temperature, a value of the reference voltage signal is a fourth function of temperature, the first function of temperature negatively correlates to the fourth function of temperature, and the second function of temperature positively correlates to the third function of temperature.