A New principle for an all digital preamplifier and equalizer

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


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 divisions from 20 Hz to 20 kHz. The deviation in the passbands is max. 0. 2 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.
Original languageEnglish
Title of host publicationAudio Engineering Society Preprint : Presented at the 80th Convention
PublisherAudio Engineering Society
Publication date1986
Publication statusPublished - 1986
EventAES Convention - Montreux, Switzerland
Duration: 4 Mar 19867 Mar 1986
Conference number: 80


ConferenceAES Convention

Bibliographical note

Paper no. 2315


  • Amplifiers, audio frequency;
  • Amplifiers, power type
  • Circuits, power supply - applications
  • Audio equipment
  • Data conversion, digital to analog
  • High efficiency power audio amplifier
  • Digital preamplifier
  • Control of power supply
  • Conversion from digital to analog signal
  • Switch-mode power supply.


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