A switching power amplifier with feedback for improving total harmonic distortion

A high efficiency and low distortion and switching power amplifier is proposed. We use feedback to reduce the total harmonic distortion (THD) and the DC output bias current. The experimental results show that the proposed circuit has 0.24% total harmonic distortion and 91% power efficiency while the...

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Veröffentlicht in:	Analog integrated circuits and signal processing 2008-06, Vol.55 (3), p.205-212
Hauptverfasser:	Kao, Chia-Hsiung, Tsai, Ping-Yu, Lin, Wen-Pin, Chuang, Yao-Jen
Format:	Artikel
Sprache:	eng
Schlagworte:	Circuits and Systems Electrical Engineering Engineering Signal,Image and Speech Processing
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	A high efficiency and low distortion and switching power amplifier is proposed. We use feedback to reduce the total harmonic distortion (THD) and the DC output bias current. The experimental results show that the proposed circuit has 0.24% total harmonic distortion and 91% power efficiency while the DC output bias current is 12 μA at 1.5 V supply voltage.
ISSN:	0925-1030 1573-1979
DOI:	10.1007/s10470-007-9047-7