An oversampled digital PWM linearization technique for digital-to-analog conversion

Author

Jung, Jin-Whi ; Hawksford, Malcolm J.

Author_Institution

Dept. of Electron. & Electr. Eng., Univ. Coll. London, UK

Volume

51

Issue

9

fYear

2004

Firstpage

1781

Lastpage

1789

Abstract

An algorithmic-based linearization process for uniformly sampled digital pulsewidth modulation (PWM) is described. It is shown that linearization of the intrinsic distortion resulting in uniformly sampled PWM can be achieved by using a fractional delay digital filter embedded within a noise shaping re-quantizer. A technique termed direct PWM mapping is proposed as a pre-compensation filter scheme for applications in high-resolution digital-to-analog conversion.

Keywords

delay filters; delta-sigma modulation; digital filters; linearisation techniques; pulse width modulation; algorithmic-based linearization; digital pulsewidth modulation; direct PWM mapping; embedded filter; fractional delay digital filter; high-resolution digital-to-analog conversion; intrinsic distortion; noise shaping requantizer; oversampled digital PWM linearization technique; precompensation filter scheme; sigma-delta modualtion; Circuits; Digital filters; Digital modulation; Digital-analog conversion; Interpolation; Linearization techniques; Noise shaping; Pulse width modulation; Space vector pulse width modulation; Switches; D/A; Digital-to-analog; PWM; SDM; conversion; pulsewidth modulation; sigma–delta modualtion;

fLanguage

English

Journal_Title

Circuits and Systems I: Regular Papers, IEEE Transactions on

Publisher

ieee

ISSN

1549-8328

Type

jour

DOI

10.1109/TCSI.2004.834487

Filename

1333227