An ultra-low-noise preamplifier for moving-coil phono cartridges using an input transistor developed in a standard integrated circuit process is presented. A signal-to-noise ratio close to the theoretical maximum is realized by careful design. Criteria are given for the noise parameters of the input device, the feedback network, and the input coupling capacitor. Experimental results are presented for a very simple amplifier configuration, having a signal-to-noise ratio of 71 dB for 10 cm/s with a low-sensitivity 14 µV (cm/s) cartridge. Output signals up to 200 mV can be handled, while the distortion is still extremely low (total harmonic distortion - 0.02%).

Authors: Nordholt, Ernst H.; van Vierzen, Ronald M.
Affiliation: Department of Electrical Engineering, Delft University of Technology, 2628 CD Delft, The Netherlands
JAES Volume 28 Issue 4 pp. 219-224; April 1980
Publication Date: April 1, 1980 Import into BibTeX
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=3993

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 free for AES members and E-Library subscribers.

Learn more about the AES E-Library

E-Library Location: (CD aes4)   /jrnl7888/1980/7702.pdf

Start a discussion about this paper!