...础元件，在小型化、集成化方面却发展缓慢．尤其是电感，在集成电路中很难实现．人们一般用回转器和电容组合或引入频变负阻(FDNR)的有源模拟方法来代替实际电感．但这种用有源模拟办法实现的电感不稳定，极其灵敏，而且受频率限制，不能应用在高频段．
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A detailed description of the theory and application of FDNR filter is made in this paper.
本文对FDNR滤波器的有关理论和应用问题作了较为详细的介绍。
As an example, a resonant loop is composed of forward differential FDNR circuit. The experiments show that the characteristics of its frequency response coincide with the theoretical analysis.
作为文中的一个例子，用FD - FDNR电路组成一个谐振回路，实验表明其频响特性与理论分析相一致。
A novel realization of floating FDNR proposed in the paper has advantages such as fewer passive and active elements, lower sensitivity, good stability, no need of adjustment, easy realization.
本文提出的浮地频变负阻新电路具有有源和无源元件少、灵敏度低、稳定性好、无需调整和易于实现等优点。
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