A Low-Noise Two-Wire Condenser Microphone Preamplifier

Killion MC. A Low-Noise Two-Wire Condenser Microphone Preamplifier. J Audio Eng Soc. 1967;15(2):163-168. Available from: https://aes.org/publications/elibrary-page/?id=1105

@article{Killion1967_1105,
  author = {Killion, Mead C.},
  title = {{A Low-Noise Two-Wire Condenser Microphone Preamplifier}},
  journal = {Journal of the Audio Engineering Society},
  volume = {15},
  number = {2},
  pages = {163--168},
  year = {1967},
  month = apr,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=1105}
}

TY  - JOUR
TI  - A Low-Noise Two-Wire Condenser Microphone Preamplifier
AU  - Killion, Mead C.
T2  - Journal of the Audio Engineering Society
J2  - J. Audio Eng. Soc.
VL  - 15
IS  - 2
SP  - 163
EP  - 168
PY  - 1967
DA  - 1967/04/06
UR  - https://aes.org/publications/elibrary-page/?id=1105
PB  - Audio Engineering Society
LA  - en
AB  - Vacuum tube preamplifiers for use with DC-biased condenser microphones have two drawbacks; they require multiwire cables and they are usually noisy. Using the high voltage transistors available today, a two-wire cathode follower type of preamplifier is practical. If a low leakage FET is used at the input, bias resistors of 1000 megohm or more become practical, substantially reducing the input noise level. The design of such a preamplifier, with its associated power supply, is discussed.
ER  -