MULTI-INPUT VOLTAGE AND CURRENT-MODE MIN/MAX CIRCUITS
Iluminada Baturone, A. Barriga, J. L. Huertas-Díaz · DIGITAL.CSIC (Spanish National Research Council (CSIC)) · 1994
.-- This paper presents briefly a review of the different algorithms and hardware implementations for multi-input min/max operators. This allow us to show how a clever utilization of MOS devices leads to very simple current and voltage-mode min/max circuits. I. INTRODUCTION Minimum and maximum operators are typically employed to define the sentence connectives in any kind of fuzzy controller. In a Mamdani's controller they also define the fuzzy implication and aggregation mechanism. Before the development of fuzzy hardware, minimum/maximum circuits were already required in signal analysis (to perform operations such as median or normalization). Artificial neural networks that are trained with unsupervised learning also utilize them. In these applications it is not necessary to know the activity level of the dominating neuron but only to identify it. In general, multiple minimum or maximum operations have to be realized. When only two-input operators are available, they are placed ser...