A Low-Noise Two-Wire Condenser Microphone Preamplifier
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.
Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!
This paper costs $33 for non-members and is temporarily free for AES members.