A Low-Voltage Low-Power Output Stage for Class-G Headphone Amplifiers

Huffenus A. A Low-Voltage Low-Power Output Stage for Class-G Headphone Amplifiers. In: AES Convention 133. Audio Engineering Society; 2012. Paper 8684. Available from: https://aes.org/publications/elibrary-page/?id=16427

@inproceedings{Huffenus2012_16427,
  author = {Huffenus, Alexandre},
  title = {{A Low-Voltage Low-Power Output Stage for Class-G Headphone Amplifiers}},
  booktitle = {AES Convention 133},
  note = {Paper 8684},
  year = {2012},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=16427}
}

TY  - CPAPER
TI  - A Low-Voltage Low-Power Output Stage for Class-G Headphone Amplifiers
AU  - Huffenus, Alexandre
T2  - AES Convention 133
M1  - Paper 8684
PY  - 2012
DA  - 2012/10/06
UR  - https://aes.org/publications/elibrary-page/?id=16427
PB  - Audio Engineering Society
LA  - en
AB  - This paper proposes a new headphone amplifier circuit architecture, which output stage can be powered with very low supply rails from ±1.8 V to ±0.2 V. When used inside a Class-G amplifier, with the switched mode power supply powering the output stage, the power consumption can be significantly reduced. For a typical listening level of 2x100µW, the increase in power consumption compared to idle is only 0.7mW, instead of 2.5mW to 3mW for existing amplifiers. In battery-powered devices like smartphones or portable music players, this can increase the battery life of more than 15% during audio playback. Theory of operation, electrical performance and a comparison with the actual state of the art will be detailed.
ER  -