随着现代电子学中各种物理测量的深入,各种类型传感器出现,许多物理量都能转化成各式电量来测量。由于信号总是受到各种电磁噪声的干扰,常常是掩没在噪声中,因此微弱信号的检测在工程技术界,如Ⅹ衍射,核磁共振,生物医学,红外和激光信号检测中已受到广泛重视和研究。微机的出现又推动电子学蓬勃发展,各种微型化、智能化仪器相继产生,同样,微弱信号检测中采用微机后就能使用相 With the deepening of various physical measurements in modern electronics, various types of sensors appear and many physical quantities can be converted into various types of power to measure. Because the signal is always interfered with by all kinds of electromagnetic noise and often masked in the noise, the detection of the weak signal has been widely recognized in the field of engineering technology, such as X-ray diffraction, nuclear magnetic resonance, biomedicine, infrared and laser signal detection And research. The emergence of microcomputer and promote the vigorous development of electronics, all kinds of miniaturization, intelligent instruments have been produced, the same weak signal detection can be used after the computer phase