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Current-mode fully-programmable piece-wise-linear block for neuro-fuzzy applications

Current-mode fully-programmable piece-wise-linear block for neuro-fuzzy applications

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A new method to implement an arbitrary piece-wise-linear characteristic in current mode is presented. Each of the breaking points and each slope is separately controllable. As an example a block that implements an N-shaped piece-wise-linearity has been designed. The N-shaped block operates in the subthreshold region and uses only ten transistors. These characteristics make it especially suitable for large arrays of neuro-fuzzy systems where the number of transistors and power consumption per cell is an important concern. A prototype of this block has been fabricated in a 0.35 µm CMOS technology. The functionality and programmability of this circuit has been verified through experimental results.

References

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      • Y.H. Pao . (1989) Adaptive pattern recognition and neural networks.
    2. 2)
      • C.C. Enz , F. Krummenacher , E.A. Vittoz . An analytical MOS transistor model valid in all regions of operation and dedicated to low-voltage and low-current applications. Analog Integr. Circuits Signal Process. , 83 - 114
http://iet.metastore.ingenta.com/content/journals/10.1049/el_20020831
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