Analysis and design of the receding horizon constrained optimization for class-D amplifier driving signals

Jwu-Sheng Hu, Keng Yuan Chen*

*Corresponding author for this work

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

This paper reports the analysis and design method of receding finite horizon constrained optimization approaches to generate driving signals for digital amplifiers. The performance of a digital amplifier that is based on power MOSFETs highly depends on the modulator that modulates the reference signal into binary sequences. The concept of receding finite horizon constrained optimization modulator is to generate the binary output in the sense that the power of filtered error is minimized. The stability analysis of this nonlinear feedback system is derived in detail and the method to estimate the bound of filtered error of the high dimensional quantization is proposed. A second order system with horizon length one and two is designed to produce a 1.5-bit constrained output. Simulation results demonstrate the accuracy of the analysis.

Original languageEnglish
Pages (from-to)1511-1525
Number of pages15
JournalDigital Signal Processing: A Review Journal
Volume20
Issue number6
DOIs
StatePublished - 1 Jan 2010

Keywords

  • Amplifiers
  • Digital filter
  • Modulation
  • Quantization
  • Receding horizon quadratic optimal control

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