The development, application, and prospects of winner-take-all circuits

The winner-take-all (WTA) circuit is a major invention in the field of electronic information and was originally proposed by Lazzaro et al. This circuit is capable of recognizing and selecting the strongest signal among multiple inputs while suppressing the others. After decades of development since the initial version, the accuracy, speed, and scalability of WTA circuits have been enhanced, rendering them still highly significant today. However, this circuit still has some issues, such as the inability to distinguish the strongest signals and severe energy consumption. This article focuses on the basic characteristics such as signal selection, analog and digital implementation, scalability, speed and precision, power consumption and applications like neural networks, image processing, telecommunications circuits, and prospects of WTA circuits, with a particular emphasis on their applications in neural networks, image processing, and telecommunication communication. This article studies the classic designs of various WTA circuits, conducts a comprehensive literature review, and compares and analyzes the designs, ultimately contributing to advancements that benefit researchers and engineers in related fields.