Conference Paper

Practical implementation of CCTA based on commercial CCII and OTA

Fac. of Ind. Technol., Suan Sunandha Rajabhat Univ., Bangkok
DOI: 10.1109/ISPACS.2009.4806670 Conference: Intelligent Signal Processing and Communications Systems, 2008. ISPACS 2008. International Symposium on
Source: IEEE Xplore

ABSTRACT This article presents a basic current-mode building block for analog signal processing, namely current conveyor transconductance amplifier (CCTA) using the commercially available ICs. The performances are examined through PSPICE simulations and experiment, displaying usabilities of the new active element. The description includes some examples as a voltage-mode universal biquad filter, a grounded inductance, a current-mode multiplier and oscillator. They occupy only a single CCTA.

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    ABSTRACT: A configuration is derived from signal flow graphs. A series of different order current-mode multifunction filters based on CCTAs can be obtained from the configuration. All the derived filters can simultaneously realize five primary responses from same topology. Both ω0 and Q can be tuned electronically independently over a wide range. Additionally, the configuration can be easily cascaded to obtain an nth-order filter which is only composed by n CCTAs and n grounded capacitors. The proposed configuration has simple structure, and is highly suitable for IC implementation. The realized circuits are simulated with SPICE to exhibit the performance.
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    ABSTRACT: This paper presents Differential Voltage current conveyor transconductance amplifier (DVCCTA) voltage mode wave active filter. This method emulates reflected and incident wave for basic building block i.e. series inductor which may then be configured for other passive element realization. The functionality of the proposed method is verified for a 4th order low pass prototype filter using SPICE simulation with 0.25µm TSMC CMOS technology parameters.
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