SENSING SYSTEM USING POSITIVE FEEDBACK

摘要

According to an embodiment of the present invention, a sensing system comprises: an actuator which applies stimulation to a detection material; a photodetector which outputs an electric signal having a snapback form by corresponding to an optical reaction formed in accordance with a concentration of the detection material when a stimulation is applied; an amplifier which amplifies the electric signal outputted from the photodetector, applying the amplified electric signal to an optical actuator through a positive feedback; a detection part which detects the detection material by receiving the electric signal; and a voltage clamping element connected to the photodetector in parallel, clamping both ends of the photodetector to allow the voltage on both ends of the photodetector to be not out of a predetermined voltage value.