Title :
Novel pulse-width-modulated current-mode analog defuzzifier for the fuzzy control of switching DC-DC converters
Author :
Alarcon, E. ; Poveda, A. ; Madrenas, I. ; Vidal, E. ; Gomariz, S. ; Guinjoan, F.
Author_Institution :
Dept. d´´Enginyeria Electron., Univ. Politecnica de Catalunya, Barcelona, Spain
Abstract :
In this communication, the authors propose a current-mode analog circuit solution for the defuzzying step required for the fuzzy-knowledge-based control (FKBC) of switching DC-DC converters. Considering the modulation of pulse widths 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 0.8 μm technology verify the functionality of both the proposed defuzzifying method and circuit
Keywords :
CMOS analogue integrated circuits; DC-DC power convertors; PWM power convertors; SPICE; circuit simulation; current-mode circuits; fuzzy control; integrating circuits; switched current circuits; 0.8 micron; HSPICE layout-extracted transistor-level simulations; current-mode analog circuit; fuzzy control; fuzzy inference controller; implicit signal-to-time conversion; pulse-width-modulated current-mode analog defuzzifier; standard CMOS technology; switched-current integrator; switching DC-DC converters; switching frequencies; Analog circuits; CMOS technology; Communication switching; Communication system control; DC-DC power converters; Power generation; Pulse width modulation; Space vector pulse width modulation; Switching circuits; Switching converters;
Conference_Titel :
Circuits and Systems, 1999. 42nd Midwest Symposium on
Conference_Location :
Las Cruces, NM
Print_ISBN :
0-7803-5491-5
DOI :
10.1109/MWSCAS.1999.867300
