Patent ID: 8400140

Claim:
A sensor system for receiving an input signal and applying a digital control signal to adjust an output sensitivity of a triggering signal within the sensor system, the input signal including a bias DC (direct current) and a fluctuation bias voltage, the sensor system comprising: a first voltage contact for providing a first comparison voltage based on the digital control signal, said first comparison voltage defining a standby voltage region; a normalized voltage contact for providing a reference voltage based on the digital control signal, said reference voltage being located within said standby voltage region; a normalized circuit coupled electrically to said normalized voltage contact for normalizing the bias DC into said reference voltage so as to normally adjusting synchronization of the fluctuation bias voltage with the bias DC, said normalized circuit includes a normalized operation unit coupled electrically to said normalized voltage contact and an input signal source for normalizing the bias DC into said reference voltage, said normalized circuit includes a first operation amplifier coupled electrically to an adjoining area between said input signal source and said normalized operation unit for amplifying the bias DC firstly and secondly by said normalized operation unit so as to normalize the bias DC into said reference voltage; and a comparison circuit coupled electrically to said normalized circuit and said first voltage contact for determining after normalizing the bias DC into said reference voltage whether the fluctuation bias voltage is located within said standby voltage region or not; wherein, when the fluctuation bias voltage is located outside of said standby voltage region, the sensor system outputs the triggering signal so as to adjust the digital control signal, where said first comparison voltage and said reference voltage are simultaneously adjusted, thereby achieving adjustment of the output sensitivity.