Ambient light elimination circuit and elimination method

The invention discloses an ambient light elimination circuit and elimination method. The ambient light elimination circuit comprises a light source acquisition module, a current processing module, an integration module and a sampling hold circuit, the light source acquisition module is used for acquiring target light and ambient light and converting the target light and the ambient light into current signals; the current processing module is used for processing the current signal; the integration module is used for carrying out integration on the processed current signal to obtain an integration voltage representing the related light acquired by the light source acquisition module, and outputting a differential voltage obtained by the integration voltage; the sample hold circuit holds and outputs the differential voltage. According to the invention, the influence of ambient light can be weakened, the detected data are more real, and the detection precision can be improved. 本发明揭示了一种环境光消除电路及消除方法，所述环境光消除电路包括光源采集