Novel Pulse-Width-Modulated Current-Mode Defuzzifier for the Fuzzy Control of Switching DC-DC Converters
نویسندگان
چکیده
In this communication, the authors propose a current-mode analog circuit solution for the defuzzifying step required for the fuzzyknowledge-based control (FKBC) of switching DC-DC converters. Considering the modulation of pulse widths which is needed for the control of switched power plants, the division operation at the output layer of a fuzzy inference controller takes advantage of the implicit signal-to-time conversion in the PWM process. This theoretical aspect is complemented with the proposal of a high-speed current-mode division circuit, which allows a wide range of switching frequencies. The PWM division circuit is preceded by a switched-current integrator to obtain a full defuzzifier. HSPICE layout-extracted transistor-level simulations for a standard CMOS 0.8μm technology verify the functionality of both the proposed defuzzifying method and circuit.
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