An Online Evolvable Chebyshev Filter Based on Immune Genetic Algorithm

ANEHP-Alpha, a new analog evolvable hardware (EHW) platform based on AN231E04 field programmable analog array (FPAA) device is described and a fourth-order Chebyshev filter is evolved on it. AN231E04 is one of the latest models of the FPAA series based on switched capacitor technology from Anadigm Corporation. Reaping the benefit of its flexible dynamic reconfiguration ability and function-level design method, we can evolve more practical and larger-scale circuits. ANEHP-Alpha is a reliable intrinsic evolvable hardware platform with high performance. Immune genetic algorithm (IGA) is adopted to serve as the main evolutionary algorithm unit and a fast pre-evaluation and bad individual elimination method is employed, which highly increases the speed of evolution and ensures the devices against damage induced by illegal individuals. In the experiment, the evolved fourth-order Chebyshev filter acquires superior performance to that of classical ones, which shows the feasibility and efficiency of ANEHP-Alpha to design optimized practical analog systems.

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