Weak signal acquisition circuit applied to single-channel lead salt photoelectric detector

The invention belongs to the technical field of infrared photoelectric signal acquisition, and mainly relates to a weak signal acquisition circuit system applied to a single-channel lead salt photoelectric detector, which is used for acquiring signals of the lead salt infrared photoelectric detector. The circuit comprises a voltage division matching resistor unit module, a blocking filter circuit unit module, a signal amplification circuit unit module, an analog-to-digital conversion unit module and a digital signal acquisition processing unit module. The invention provides a low-noise weak signal acquisition circuit which can be applied to a single-channel infrared photoelectric detector on the basis of the prior art. The weak photoelectric signals are filtered and amplified, so that the photoelectric signals are prevented from being interfered or even submerged by various loud noises. Therefore, by adopting the signal acquisition circuit system, the photoelectric signals can be better acquired and analyzed,