一种高性能的金属探测门信号处理电路的设计

设计了基于正交解调和窄带滤波技术的信号处理电路,它使用模拟开关作为乘法器,实现解调,并使用一种性能优异的窄带滤波电路对解调结果进行滤波和放大.整个电路具有高增益、高灵敏度、强抗干扰能力、低成本等优点,可有效提高金属探测门的性能.

Design of High Performance Signal Processing Part of Walk Through Metal Detector

This paper described the design of signal processing part circuit based on amplitude demodulation and narrowband filtering technology.A analog switch was used to demodulate and a high prerformance narrowband filter was used to process demodulation results.The whole design had many features, such as high gain, high sensitivity, high anti-jamming ability, low cost, and so on. It could improve the performance of walk through metal detector significantly.