Abstract
The current conveyor is a newly introduced promising circuit building block. In this paper, its history has been traced since its invention in 1968 and the present state of affairs is reviewed. At present the tendency is to replace as many operational amplifier circuits by their current conveyor versions as possible. Analog computation, gyrators, mutators, inductor simulation, frequency dependent negative resistance, transfer function realization, various types of filters, RC oscillators etc. are some main fields where current conveyor has proved its usefulness. Also there are some circuits which are not possible using operational amplifiers, so current conveyor is only choice available for these circuits. Now-a-days one criterion of success of a new circuit is that it sould be possible to obtain its integrated circuit form. Contemporary circuits have been tested on this criteria and suggestions for future research have been given.
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