Realisierung eines Verzerrungsarmen Open-Loop Klasse-D Audio-Verstärkers mit SB-ZePoC [Realization of a low switching Open Loop Class D amplifiers using SB-ZePoC]

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Schnick, O.; Mathis, W.: Realisierung eines Verzerrungsarmen Open-Loop Klasse-D Audio-Verstärkers mit SB-ZePoC [Realization of a low switching Open Loop Class D amplifiers using SB-ZePoC]. In: Advances in Radio Science 5 (2007), S. 225-230. DOI:

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Sum total of downloads: 343

Class-D amplifiers are suiteble for amplification of audio signals. One argument is their high efficiency of 90% and more. Today most of the audio signals are stored or transmitted in digital form. A digitally controlled Class-D amplifier can be directly driven with coded (modulated) data. No separate D/A conversion is needed. Classical modulation schemes like Pulse-Width-Modulation (PWM) cause aliasing. So a very high switching rate is required to minimize the aliasing component within the signal band. This paper shows a first implementation of the new SB-ZePoC modulation scheme (Zero Position Coding with Separated Baseband), which allows the generation of a binary signal with separated baseband. Therefore Class-D amplifiers using SB-ZePoC can be run with very low switching rates. Some benefits and problems in the design process because of low switching rates will be discussed. Measurements of a real-time implementation will be presented.
License of this version: CC BY-NC-SA 2.5 Unported
Document Type: Article
Publishing status: publishedVersion
Issue Date: 2007
Appears in Collections:Fakultät für Elektrotechnik und Informatik

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pos. country downloads
total perc.
1 image of flag of Germany Germany 238 69.39%
2 image of flag of United States United States 32 9.33%
3 image of flag of Russian Federation Russian Federation 19 5.54%
4 image of flag of Czech Republic Czech Republic 9 2.62%
5 image of flag of China China 7 2.04%
6 image of flag of Switzerland Switzerland 7 2.04%
7 image of flag of Japan Japan 5 1.46%
8 image of flag of Iran, Islamic Republic of Iran, Islamic Republic of 4 1.17%
9 image of flag of Korea, Republic of Korea, Republic of 3 0.87%
10 image of flag of Poland Poland 2 0.58%
    other countries 17 4.96%

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