Design Considerations of Low-Noise Audio Input Circuitry for a Professional Microphone Mixer

Smith AD, Wittman PH. Design Considerations of Low-Noise Audio Input Circuitry for a Professional Microphone Mixer. J Audio Eng Soc. 1970;18(2):140-156. Available from: https://aes.org/publications/elibrary-page/?id=1515

@article{Smith1970_1515,
  author = {Smith, A. Douglas and Wittman, Paul H.},
  title = {{Design Considerations of Low-Noise Audio Input Circuitry for a Professional Microphone Mixer}},
  journal = {Journal of the Audio Engineering Society},
  volume = {18},
  number = {2},
  pages = {140--156},
  year = {1970},
  month = apr,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=1515}
}

TY  - JOUR
TI  - Design Considerations of Low-Noise Audio Input Circuitry for a Professional Microphone Mixer
AU  - Smith, A. Douglas
AU  - Wittman, Paul H.
T2  - Journal of the Audio Engineering Society
J2  - J. Audio Eng. Soc.
VL  - 18
IS  - 2
SP  - 140
EP  - 156
PY  - 1970
DA  - 1970/04/06
UR  - https://aes.org/publications/elibrary-page/?id=1515
PB  - Audio Engineering Society
LA  - en
AB  - A survey of audio mixers made prior to the design of a recently introduced professional microphone mixer indicated a lack of uniformity in the industry with regard to methods for measuring and specifying noise performance. This paper discusses some of the methods for determining noise performance which are presently in use and suggests a preferred technique. The microphone mixer which evolved from this noise investigation is also described, with emphasis on those techniques used to develop the extremely noise-free input stages used in the mixer. The performance attained is presented, along with reference tables and graphs which should serve as an aid to designers and users of professional audio equipment.
ER  -