A charge-based winner-take-all (WTA) circuit is proposed. This WTA circuit is a min-net capable of selecting the minimum value among its input nodes and gives only one low voltage for the corresponding output node. The chargebased circuit uses a power supply of 3 V, with low power dissipation due to the lack of static DC current involved. The WTA circuit is used in associative neural networks.
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He et al. (1993) studied this question.