CAJ | 학술논문

通过级联积分器单元的方式，设计了一种基于电流传输跨导放大器（CCTA）的可级联的电流模式多功能高阶滤波结构。通过选择合适的输入电流，该结构能够同时实现低通、带通、高通和带阻等功能，其品质因素Q和角频率ω0都可以通过调整CCTA的偏置电流（ IB ）来实现电调谐。此n阶滤波器仅仅包含n个CCTA和n个接地电容，具有最少的有源和无源器件数目，电路结构简单，非常适合制作全集成IC。最后采用PSPICE仿真验证了所设计电路的性能。
통과급련적분기단원적방식，설계료일충기우전류전수과도방대기（CCTA）적가급련적전류모식다공능고계려파결구。통과선택합괄적수입전류，해결구능구동시실현저통、대통、고통화대조등공능，기품질인소Q화각빈솔ω0도가이통과조정CCTA적편치전류（ IB ）래실현전조해。차n계려파기부부포함n개CCTA화n개접지전용，구유최소적유원화무원기건수목，전로결구간단，비상괄합제작전집성IC。최후채용PSPICE방진험증료소설계전로적성능。
A cascadable current-mode multifunction filter using CCTA is proposed. By properly selecting the applied input currents;it can simultaneously realize low-pass, band-pass, all-pass, and high-pass and band-reject responses from one topology without any component matching conditions. Both of the parameter ω0 and Q can be tuned electronically inde-pendently over a wide range by varying the bias current( IB )of the CCTA without affecting each other. Additionally, the proposed nth-order filter is only composed by n CCTAs and n grounded capacitors. So the configuration has the least number of passive and active components;the proposed configuration enjoys having simple structure, and it is highly suit-able for IC implementation. The realized circuits are simulated with SPICE to exhibit its performance.