Improved Class-K amplifier for headset applications - Archive ouverte HAL Access content directly
Conference Papers Year :

Improved Class-K amplifier for headset applications

Gaël Pillonnet
A Huffenus
  • Function : Author
F Goutti
  • Function : Author
V Rabary
  • Function : Author


This paper proposes an improved Class-K audio amplifier as an alternative solution to Class-AB and Class-G audio amplifiers for Headset applications. The Class-K architecture consists in a linear and a switching amplifier connected in parallel to the same speaker. The advantage of this solution is to associate the power efficiency of the switching amplifier with the linearity of a linear amplifier. However, the Class-K may suffer from static consumption. Three methods are presented in order to compensate the topology's disadvantages: a ternary modulation, a two-stage linear amplifier and a low idle switching amplifier. In this paper, we present the Class-K operating principle, a topological comparison and solutions to improve high static consumption. The simulation results prove the validity of these solutions, achieving less than 2mA of static current.
Fichier principal
Vignette du fichier
NEWCAS 2010 Montréal_v9.pdf (908.07 Ko) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-01103672 , version 1 (15-01-2015)



E Sturtzer, Gaël Pillonnet, A Huffenus, N Abouchi, F Goutti, et al.. Improved Class-K amplifier for headset applications. IEEE International NEWCAS Conference, 2010, Montreal, Canada. pp.5, ⟨10.1109/NEWCAS.2010.5603759⟩. ⟨hal-01103672⟩
158 View
444 Download



Gmail Facebook Twitter LinkedIn More