In order to extract weak signals from the strong noise better and to meet the needs of industrial development

practical projects utilizing the technology of synchronous heterodyne

design a weak signal detection device based on STM32F107 VC microcontroller as the control unit and MC1496 as the core of detection.According to the requirement of the detection precision of the weak signal detection device

analyze error sources of the detection device and propose the solution to reduce error. It is verified by the measured data. The experimental results show that the device can realize the identification and detection of different frequency signals and it has high precision.