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一近十多年来随着半导体器件的发展和广泛应用,负阻抗变换器模型的实现已是可能。电路设计者为了达到预期目的,可以直接、简便地应用这些模型进行电路设计。有一类有源滤波器就是利用负阻抗变换器(NIC)与RC网络联接而成的。另一类有源滤波器则是用负阻抗变换器与有耗LG网络链接以达到补偿元件损耗的目的。文献[5]指出纯电抗四端网络终接负阻时自然频率可由p平面左半平面移到右半平面。用有耗LC元件实现给定网络函数时,可以预畸网络函数的极点(自然频率)到右半平面然后进行综合。这样就涉及
For more than a decade, with the development and widespread application of semiconductor devices, the realization of a negative impedance converter model is already possible. Circuit designers can directly and easily apply these models for circuit design in order to achieve their intended purpose. One type of active filter is the use of negative impedance converter (NIC) and RC network connection made. Another type of active filter is the use of negative impedance converter and lossy LG network link in order to achieve the purpose of compensation for component losses. The literature [5] pointed out that the natural frequency of the pure reactance four-terminal network negative termination can be shifted from the left half of the p-plane to the right half-plane. When a given network function is implemented with a dissipative LC element, the poles (natural frequencies) of the network function can be prediagnosed to the right-half plane and then synthesized. This involves