A Signal Biasing Output Transformerless Transistor Power Amplifier

Heyser RC. A Signal Biasing Output Transformerless Transistor Power Amplifier. J Audio Eng Soc. 1960;8(3):185-192. Available from: https://aes.org/publications/elibrary-page/?id=502

@article{Heyser1960_502,
  author = {Heyser, Richard C.},
  title = {{A Signal Biasing Output Transformerless Transistor Power Amplifier}},
  journal = {Journal of the Audio Engineering Society},
  volume = {8},
  number = {3},
  pages = {185--192},
  year = {1960},
  month = jul,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=502}
}

TY  - JOUR
TI  - A Signal Biasing Output Transformerless Transistor Power Amplifier
AU  - Heyser, Richard C.
T2  - Journal of the Audio Engineering Society
J2  - J. Audio Eng. Soc.
VL  - 8
IS  - 3
SP  - 185
EP  - 192
PY  - 1960
DA  - 1960/07/06
UR  - https://aes.org/publications/elibrary-page/?id=502
PB  - Audio Engineering Society
LA  - en
AB  - Power amplifiers are usually designed to perform best into a purely dissipative load of constant value. Loudspeaker systems however contain large reactive impedance components capable of considerable energy storage. Recognizing this fact a simple output transformerless transistor power amplifier is developed which, through the expedience of extracting a small amount of stored loudspeaker energy when required, is capable of delivering low subjective distortion to a loduspeaker system while maintaining an electrical operating efficiency approaching that of a conventional Class B amplifier.
ER  -