High-efficiency filterless Class D amplifier with peak detector

High-efficiency filterless Class D amplifier with peak detector

This paper presents a fully integrated filterless Class D amplifier embodying a peak detector to improve the power efficiency at low power range. The peak detector monitors the switching frequency accordingly by sensing the amplitude of the input signal. The Class D amplifier is fabricated using 0.1...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Chongfei Jin, Meng Tong Tan, Kye Yak See
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Band pass filters
Detectors
filterless Class D amplifier
Modulation
peak detector
Power amplifiers
Power generation
Power harmonic filters
Switching frequency
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Beschreibung
Zusammenfassung:This paper presents a fully integrated filterless Class D amplifier embodying a peak detector to improve the power efficiency at low power range. The peak detector monitors the switching frequency accordingly by sensing the amplitude of the input signal. The Class D amplifier is fabricated using 0.18μm CMOS technology with a total area of 1 mm 2 . From our measurements, the proposed design has high power efficiency (>;86%) for a wide output power range (50 mW-700 mW). Our design maintains very good low total harmonic distortion (THD) (
ISSN:2165-3542
DOI:10.1109/ICCDCS.2012.6188910