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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: https://doi.org/10.5194/ars-5-225-2007
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Selected time period:
Sum total of downloads: 343
| Abstract: | |
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 |
distribution of downloads over the selected time period:
downloads by country:
| pos. | country | downloads | ||
|---|---|---|---|---|
| total | perc. | |||
| 1 |  |
Germany | 238 | 69.39% |
| 2 |  |
United States | 32 | 9.33% |
| 3 |  |
Russian Federation | 19 | 5.54% |
| 4 |  |
Czech Republic | 9 | 2.62% |
| 5 |  |
China | 7 | 2.04% |
| 6 |  |
Switzerland | 7 | 2.04% |
| 7 |  |
Japan | 5 | 1.46% |
| 8 |  |
Iran, Islamic Republic of | 4 | 1.17% |
| 9 |  |
Korea, Republic of | 3 | 0.87% |
| 10 |  |
Poland | 2 | 0.58% |
| other countries | 17 | 4.96% | ||
Further download figures and rankings:
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