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| DESIGNING HIGH-ORDER CURRENT MODE FILTER WITH LADDER STRUCTURE USITNG CCII GYRATOR |
| Wang Chunhua①②; Shen Guangdi①; Xu Chen①;Li Jianjun①; Shi Chen①; Guo Xia① |
| ①School of Electron. Info. and Control Eng., Beijing Polytechnic Univ. andBeijing Optoelectronic Technology Laboratory Beijing 100022 China;②College of Information Engineering Xiangtan University Xiangtan 411105 China |
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Abstract This paper presents a new method of designing high-order CCII filter.The method is synthesizing input immittance of passive ladder network by CCII gyrators and realizing high-order current mode CCII nlter.The paper analyzes non-ideal character of CCII and gives out the compensation method. Compared with other similar circuits, the designed circuit using this method has simpler structure and fewer number of CCIIs. Design example of 6-th order Butterworth filter and its computer PSPICE imitation results before compensation and after compensation are also given.
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Received: 14 April 1999
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2001, Vol. 23 
