Voltage-mode universal filter with one input and five outputs using DDCCTAs and all-grounded passive components

被引:30
作者
Channumsin, Orapin [1 ]
Pukkalanun, Tattaya [1 ]
Tangsrirat, Worapong [1 ]
机构
[1] KMITL, Fac Engn, Bangkok 10520, Thailand
关键词
Differential difference current conveyor; transconductance amplifier (DDCCTA); Universal filter; Voltage-mode circuit; BIQUADRATIC-FILTERS; ROBUST;
D O I
10.1016/j.mejo.2012.05.002
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
This paper presents a versatile voltage-mode universal active filter with one input and five output terminals. The proposed circuit is based on using the recently reported active building block, namely differential difference current conveyor transconductance amplifier (DDCCTA). It employs two DDCCTAs as active elements together with two resistors and two capacitors as passive elements, which are all grounded. The circuit simultaneously realizes all the five standard biquadratic filter functions; i.e., lowpass (LP), bandpass (BP), highpass (HP), bandstop (BS) and allpass (AP), without changing circuit topology. The proposed circuit also has the advantage of high-input impedance terminal, and exhibits electronic tunability of its important parameters through the bias current of the DDCCTA as well as low sensitivity performance. PSPICE simulations using 0.5 mu m MIETEC CMOS process are used to validate the theoretical predictions. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:555 / 561
页数:7
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