引言数字积分检波和滤波由Hewlett-Packard在1978年提出。后来有许多论文讨论了它们的优点和问题，但由于工艺水平的限制却没有真正的实现。现在出现了许多专用DSP，如完全可编程的单片合成器、正交混频器、低通滤波器等等，似乎工艺限制已经消失了。但事实并非如此。这些IC并 Introduction Digital integral detection and filtering was proposed by Hewlett-Packard in 1978. Many papers later discussed their merits and problems, but none of them have been truly realized due to technological limitations. There have now been many specialized DSPs such as fully programmable monolithic synthesizers, quadrature mixers, low-pass filters, etc., and it appears that the process limitations have disappeared. but it is not the truth. These ICs are