A new low voltage linearization technique employing plurality of CCII coupled pairs

In this paper a new highly linear transconductor consisting of N second order current conveyors (CCII) coupled pairs with linearization resistors was designed for low-voltage operation. By applying variable offset voltages to these CCII coupled pairs, the linearity of the resulted transconductor can be substantially improved. We show that the type and the dynamic range of the obtained transconductor depend on the value of linearization resistors that are used. Thus, depending on the value of the linearization resistors used, a ldquotanhrdquo type behavior transconductor can be obtained, for which the linear input range is inversely proportional to gain or a ldquosinhrdquo type behavior, for which the linear input range is directly proportional to gain. This represents an advantage for various applications in the field of communications. The simulations performed in 0.18 mum bipolar technology confirm the theoretical results.