Current Differencing Cascaded Transconductance Amplifier (CDCTA) and Its Applications on Current-Mode nth-Order Filters

被引：14

作者：

Xu, Jun ^{[1
,2
]}

Wang, Chunhua ^{[1
]}

Jin, Jie ^{[1
]}

机构：

[1] Hunan Univ, Coll Informat Sci & Engn, Changsha 410082, Hunan, Peoples R China

[2] Peoples Liberat Army, Unit 95316, Guangzhou 510900, Guangdong, Peoples R China

来源：

CIRCUITS SYSTEMS AND SIGNAL PROCESSING | 2013年 / 32卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Current-mode; CDTA; CDCTA; nth-Order filter; BUFFERED AMPLIFIER; OSCILLATOR; CDTA; REALIZATION; CCCDTAS;

D O I：

10.1007/s00034-013-9565-8

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this paper, a new active device, current differencing cascaded transconductance amplifier (CDCTA), has been presented. The proposed CDCTA simplifies the design of the current-mode filter circuit considerably, especially the design of high-order filter. Moreover, a current-mode nth-order filter based on the CDCTA is proposed in the paper. The proposed circuit, which adopts only an active component and n grounded capacitors, contains minimal active component and passive one. It enjoys the simple configuration and is suitable for integrated circuit (IC) fabrication. PSpice simulations for current-mode third-order filter based on this structure have also been conducted, and the results are in good agreement with the theoretical analysis. The influences of the CDCTA non-idealities are also discussed.

引用

页码：2047 / 2063

页数：17

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