The Temperature Insensitive and Electronic Tuning of Current-mode First-order Allpass Filters

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Kessarin Phuphanee
Khomgrit Doniesuan
Thitiporn Janda
Adirek Jantakun


This article presents the three circuits of current-mode first-order allpass filters which are electronically tunable and temperature insensitive. The proposed circuits provide separate elements which are CCII, CCTA, grounded resistor and grounded capacitor. The pole frequency and phase response can be tuned by input bias currents of CCTA. Furthermore, low impedances of input and high impedances of output that are advantageous for use in current-mode configuration. In addition, the proposed allpass filters are temperature insensitive and the sensitivities are low. The PSPICE program was used to corroborate the performances of the proposed allpass filters. They show a good results and according to theoretical.


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Author Biographies

Khomgrit Doniesuan, Rajamangala University of Technology Isan (Khon Kaen Campus)

Department of Electronics and Telecommunication Engineering, Faculty of Engineering

Rajamangala University of Technology Isan (Khon Kaen Campus)

Khonkaen Campus, Khonkaen, Thailand

Thitiporn Janda, Rajamangala University of Technology Isan (Khon Kaen Campus)

Department of Electronics and Telecommunication Engineering, Faculty of Technical Education

Rajamangala University of Technology Isan, Khonkaen Campus, Khonkaen, Thailand

Adirek Jantakun, Rajamangala University of Technology Isan (Khon Kaen Campus)

Department of Electronics and Telecommunication Engineering, Faculty of Engineering

Rajamangala University of Technology Isan, Khonkaen Campus, Khonkaen, Thailand


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