Fourier Series Analysis for Nonlinearities Due to the Power Supply Noise in Open-Loop Class D Amplifiers

Author

Shu, Wei ; Chang, Joseph S. ; Ge, Tong ; Tan, Meng Tong

Author_Institution

Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore

fYear

2006

fDate

4-7 Dec. 2006

Firstpage

720

Lastpage

723

Abstract

The mechanisms for the power supply noise in open-loop single-ended output and H-bridge output PWM class D amplifiers are investigated. Using Fourier series analyses, expressions for power supply rejection ratio (PSRR) and inter-modulation distortion (IMD) are derived. These expressions show that the former OL-CDA topology features a worse PSRR but a better IMD than the latter topology. The derived expressions provide insight to the design of class D amplifiers and the analysis herein can be extended to closed-loop class D amplifiers

Keywords

Fourier analysis; amplifiers; circuit simulation; intermodulation distortion; Fourier series analysis; H-bridge output; OL-CDA topology; PWM class D amplifiers; inter-modulation distortion; open-loop class D amplifier nonlinearity; power supply noise; power supply rejection ratio; single-ended output; Fourier series; Intermodulation distortion; Power amplifiers; Power engineering and energy; Power supplies; Pulse amplifiers; Pulse width modulation; Pulsed power supplies; Space vector pulse width modulation; Topology;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2006. APCCAS 2006. IEEE Asia Pacific Conference on

Conference_Location

Singapore

Print_ISBN

1-4244-0387-1

Type

conf

DOI

10.1109/APCCAS.2006.342109

Filename

4145494