Details

Autor(en) / Beteiligte

• Pillonnet, G.
• Abouchi, N.
• Cellier, R.
• Nagari, A.

Titel

A 0.01%THD, 70dB PSRR Single Ended Class D using variable hysteresis control for headphone amplifiers

Ist Teil von

• 2009 IEEE International Symposium on Circuits and Systems (ISCAS), 2009, p.1181-1184

Ort / Verlag

IEEE

Erscheinungsjahr

2009

Link zum Volltext

• IEEE_Xplore

Quelle

IEEE Electronic Library (IEL)

Beschreibungen/Notizen

• Switching audio amplifiers are widely used in H-bridge topology thanks to their high efficiency; however low audio performances in single ended power stage topology is a strong weakness leading to not be used for headset applications. This paper explains the importance of efficient error correction in single ended class-D audio amplifier. A hysteresis control for class-D amplifier with a variable window is also presented. The analyses are verified by simulations and measurements. The proposed solution was fabricated in 0.13 mum CMOS technology with an active area of 0.2 mm 2 . It could be used in single ended output configuration fully compatible with common headset connectors. The proposed class-D amplifier achieves a harmonic distortion of 0.01% and a power supply rejection of 70 dB with a quite low static current consumption.