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本文研究图数转换仪手扶跟踪系统中,低噪声低电平高精度同步相敏检波系统最佳探测滤波和信息传递问题。文中根据双极晶体管差分输入线性运算放大器等效噪声电阻与电导的频谱响应曲线,提出按重要信号抗干扰低噪声最佳频谱响应组合带通滤波器的设计准则和最佳探测滤波信息传递条件。用低电平高精度同步相敏检波开关——差分输入滤波器复现系统控制信号。理论分析与实践表明,二者吻合很好。最后列表与加拿大同类系统主通道主要性能做了简要对比,对比结果说明,本文系统的主要性能要比加拿大的好。
This paper studies the problem of the best detection filtering and information transmission in the handheld tracking system of the digraph converter with low noise and low level, high precision synchronous phase sensitive detection system. According to the spectral response curves of the equivalent noise resistance and the conductance of the BOP differential input linear operational amplifier, the design criteria and the optimal detection filtering information transmission conditions for the combination of band-pass filter with anti-jamming and low-noise best spectral response are proposed. Using low-level high-precision synchronous phase-sensitive detection switch - differential input filter system control signal reproduction. Theoretical analysis and practice show that the two are in good agreement. The final list is a brief comparison with the main performance of the main channel of similar system in Canada. The comparison results show that the main performance of this system is better than that of Canada.