Abstract
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 language | English |
|---|---|
| Title of host publication | Audio Engineering Society Preprint : Presented at the 80th Convention |
| Publisher | Audio Engineering Society |
| Publication date | 1986 |
| Publication status | Published - 1986 |
| Event | AES Convention - Montreux, Switzerland Duration: 4 Mar 1986 → 7 Mar 1986 Conference number: 80 |
Conference
| Conference | AES Convention |
|---|---|
| Number | 80 |
| Country/Territory | Switzerland |
| City | Montreux |
| Period | 04/03/1986 → 07/03/1986 |
Bibliographical note
Paper no. 2315Keywords
- 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.