The basic properties of the translinear operational current amplifier (TOCA), a versatile active element which has been introduced recently, are described. This differential-input active device is used in conjunction with passive RC block-elements to obtain the standard configurations of new current transfer functions. The active sensitivities have been considered in order to determine the domain suitable to filtering applications. A circuit prototype with adjustable values for the current transfers was implemented. Experimental results which confirm the theoretical analysis are given.
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Fabre et al. (1987) studied this question.
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