New method class D amplifier which enables reduction of RF noise and signal distortion

Author

Igarashi, Takuya ; Komine, Naoki ; Taihua, Li ; Fukai, Yuki ; Arai, Takahiro ; Sano, Yuji

Author_Institution

Grad. Sch. of Eng., Toyo Univ., Kawagoe, Japan

fYear

2012

Firstpage

265

Lastpage

268

Abstract

Proposed class D amplifier can reduce its output amplitude voltage to half by modulating output pulse polarity according to input signal polarity. And the modulation can reduce harmonics of output pulse to about half with compensating signal delay. Moreover, the proposed amplifier can reduce signal distortion occurred after PWM stage. In measured results, the proposed amplifier was able to decrease fundamental and odd harmonics in output pulse by 41.4dB or more. Moreover, the proposed amplifier was able to decrease the second harmonic distortion by 16.3dB. Therefore, THD of proposed amplifier was reduced to half or less in large output signal.

Keywords

amplifiers; harmonic distortion; signal denoising; RF noise reduction; THD; class D amplifier; input signal polarity; output pulse polarity; second harmonic distortion reduction; signal distortion reduction; Equations; Harmonic analysis; Harmonic distortion; Noise; Proposals; Pulse width modulation; Class D amplifier; Distortion; EMI; Noise; PWM; THD;

fLanguage

English

Publisher

ieee

Conference_Titel

New Circuits and Systems Conference (NEWCAS), 2012 IEEE 10th International

Conference_Location

Montreal, QC

Print_ISBN

978-1-4673-0857-1

Electronic_ISBN

978-1-4673-0858-8

Type

conf

DOI

10.1109/NEWCAS.2012.6329007

Filename

6329007