A Review of Design Methods for Digital Modulators

Author

Adrian, Victor ; Gwee, Bah-Hwee ; Chang, Joseph S.

Author_Institution

Nanyang Technol. Univ., Singapore

fYear

2007

fDate

26-28 Sept. 2007

Firstpage

85

Lastpage

88

Abstract

One of the main components in a digital class D amplifier is the digital modulator. This modulator is necessary so that an N-bit digital input can be converted into 1-bit modulated pulses, which in turn are used for high efficiency operation in the output stage of the class D amplifier. In this paper, we review three design methods for digital modulators. The three design methods are: pulse width modulation, pulse density modulation, and algorithmic PWM-multi-bit DeltaSigma modulation. Among these methods, the algorithmic PM-multi-bit DeltaSigma modulation can have the best trade-offs between performance and power dissipation.

Keywords

audio-frequency amplifiers; modulators; network synthesis; pulse width modulation; sigma-delta modulation; algorithmic PWM-multibit DeltaSigma modulation; audio amplifiers; digital class D amplifier; digital modulator design methods; power dissipation; pulse density modulation; pulse width modulation; review; Design methodology; Digital modulation; Power amplifiers; Power dissipation; Pulse amplifiers; Pulse circuits; Pulse generation; Pulse modulation; Pulse width modulation; Space vector pulse width modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Integrated Circuits, 2007. ISIC '07. International Symposium on

Conference_Location

Singapore

Print_ISBN

978-1-4244-0797-2

Electronic_ISBN

978-1-4244-0797-2

Type

conf

DOI

10.1109/ISICIR.2007.4441802

Filename

4441802