2006•Unpublished venueRequires access

Design of a Discrete Pulse Frequency Modulation

Ping Luo

Abstract

A pulse frequency modulation (PFM) with discrete frequency is designed.Unlike conventional PFM,this modulation supplies only two frequencies and automatically switches frequency when changes in load are sensed.The modulation has a simple structure,high efficiency in light load and regular distribution of spectrum.A control circuit with this modulation is implemented on a Boost converter.The circuit is designed based on UMC's 0.5 μm CMOS process,and its performance has been verified by Hspice simulation.

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Key concepts: Pulse-frequency modulation, Modulation (music), Frequency modulation, Analog transmission, Electronic engineering, Pulse-width modulation, Pulse-amplitude modulation, Pulse-density modulation