基于单个CCCCTA接地回转器的系统综合

为综合基于CCCCTA的接地回转器，根据CCCCTA的零-镜模型和接地回转器的节点导纳矩阵，利用节点导纳矩阵扩展法，我们实现了4个相互等效的接地回转器。导出的回转器具有两个特点，一个是通过调节CCCCTA的偏置电流，可以电控调节回转器的参数； 另一个特点是电路仅使用单个CCCCTA。作为一个例子，通过使用导出的回转器之一，我们实现了一个极点频率为1.274MHz、品质因素为4的带通滤波器。计算机仿真证明所导出的电路正确有效。

Systematic Synthesis of Grounded Gyrator Using Single CCCCTA

In order to synthesize the grounded gyrator employing current controlled current conveyor transconductance amplifiers (CCCCTAs), according to eight alternative nodal admittance matrix (NAM) expansion equations as well as 16 nullor-mirror models for the CCCCTA, Four alternative gyrators employing single CCCCTA are received by NAM expansion method. The derived grounded gyrators enjoy two features; one is that its parameter can be tuned through adjusting the bias currents of CCCCTAs, the other is only use of single CCCCTA component. As an example, a band-pass filter with fo=1.274MHz, Q=4 is realized by using one of the derived grounded gyrators. The computer simulations are included to verify the workability of the derived circuits.