A New Principle for a High Efficiency Power Audio Amplifier for Use with a Digital Preamplifier

Jensen JA. A New Principle for a High Efficiency Power Audio Amplifier for Use with a Digital Preamplifier. In: AES Convention 80. Audio Engineering Society; 1986. Paper 2346. Available from: https://aes.org/publications/elibrary-page/?id=5084

@inproceedings{Jensen1986_5084,
  author = {Jensen, Jørgen Arendt},
  title = {{A New Principle for a High Efficiency Power Audio Amplifier for Use with a Digital Preamplifier}},
  booktitle = {AES Convention 80},
  note = {Paper 2346},
  year = {1986},
  month = mar,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=5084}
}

TY  - CPAPER
TI  - A New Principle for a High Efficiency Power Audio Amplifier for Use with a Digital Preamplifier
AU  - Jensen, Jørgen Arendt
T2  - AES Convention 80
M1  - Paper 2346
PY  - 1986
DA  - 1986/03/06
UR  - https://aes.org/publications/elibrary-page/?id=5084
PB  - Audio Engineering Society
LA  - en
AB  - The use of class-B and class-D amlifiers for converting digital audio signals to analog signals is discussed. It is shown that the class-D amplifier is unsuitable due to distortion. Therefore, a new principle involving a switch-mode power supply and a class-B amplifier is suggested. By regulating the supply voltage to the amplifier according to the amplitude of the audio signal, a higher efficiency than can be obtained by the current principles is achieved. The regulation can be done very efficiently by generating the control signal to the power supply in advance of the audio signal, made possible by the digital signal from the preamplifier. A prototype shows possibilities for further developments.
ER  -