基于单个VDTA浮地回转器的系统综合法

为了得到单个VDTA浮地回转器，首先给出了VDTA的16个奇异模型，再根据节点导纳矩阵扩展法，系统综合了基于电压差分跨导放大器（VDTA）的浮地回转器，该回转器使用1个VDTA和一个接地电容，而且容易集成。通过调节的VDTA偏置电流，电路的参数能电控调节。最后，为了证实导出电路的可实现性，利用回转器构造了一个二阶通用滤波器，其极点频率fo=159 kHz，品质因数Q=1。MULTISIM仿真结果与理论一致。

Systematic Synthesis Approach of Floating Gyrator Using Single VDTA

To gain a floating gyrator using single VDTA, after presenting 16 pathological models of VDTA, the floating gyrator using single VDTA has systematically been synthesized by means of the nodal admittance matrix expansion method. The synthesized floating gyrator circuit employs only a VDTA and a grounded capacitor. It is desirable for IC implementation and its parameter can be electronically tuned through tuning bias currents of the VDTA. Finally, as an example, the MULTISIM simulation results of a second-order universal filter with fo=159 kHz and Q=1, constructed by using the floating gyrator, are presented to verify the realizability of the derived circuit.