A new principle for an all-digital preamplifier and equalizer, to be used together with a Compact Disc player, is described. The principle makes it possible to obtain an arbitrary gain transfer function together with a linear phase. The gain can be varied 20 dB from point to point, when specified on a logarithmic frequency axis with 30 dB. Taking advantage of the digital signal from the preamplifier, a high-efficiency power amplifier can be developed. A prototype of the preamplifier built with commercially obtainable components has shown promising results.

Author: Jensen, Jørgen Arendt
Affiliation: Electronics Laboratory, Technical University of Denmark, DK-2800 Lyngby, Denmark
JAES Volume 35 Issue 12 pp. 994-1003; December 1987
Publication Date: December 1, 1987 Import into BibTeX
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=5170

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