Synthesis of a current mode second order band pass filter using the Genetic Algorithm

In this paper we present a synthesis of the current mode second order band pass filter constituted by current conveyor circuits. For that, the optimal sizing of CMOS positive second-generation Current Conveyors (CCII+) using a nature-inspired algorithm called Genetic Algorithm (GA) is presented, this technique has been employed to obtain the optimal physical dimensions of the constituent PMOS and NMOS transistors of the CCII+, that provide to this circuit the best performances. The optimized CCII+ configuration is used as a building block of the current mode second order band pass filter. A comparison between the performances reached by the GA and others Meta-heuristics from literature was made in this article. PSPICE simulation is used to validate the obtained results/performances.

I. Introduction

Current mode circuits have been receiving a huge attention in analog signal processing and the most useful block for high frequency current mode applications is the current conveyor, this latter has evolved from first generation to second generation. The first generation current conveyor (CCI) was proposed by Smith and Sedra in 1968 [1] and the second generation (CCII) is an extension of their first generation introduced by the same two authors in 1970 [2].