Memristor Crossbar Based Winner Take All Circuit Design for Self-organization

Self-organizing mechanism is an important feature of the human perception system. It is an unsupervised learning process which does not require labeled data. In this paper, we have designed a novel mixed signal architecture for training a self-organizing system. A memristor(1) crossbar is utilized for higher synaptic weight density and parallel analog operation. The system essentially implements the winner take all learning algorithm. A novel neuron circuit is designed for the winning neuron detection and lateral inhibition operations. Our experimental results show that the proposed system can self-organize based on unlabeled training data.