Abstract
A completely digital audio power amplifier uses binary (two-level) signals up to the power stage. Often MOSFETs are used as power devices, as they can provide a high output power together with a fast switching speed. The generation of accurate, rectangular pulses in the analogue power amplifier circuit is a problem, especially at pulses with an extremely short duration, as they may come from high resolution Sigma-Delta Modulation. In this paper some of the typical pulse signal waveform distortions introduced by the realistic switching power stage are shown by simple circuit models. Additionally it will be explained, how certain errors can affect the linearity of pulse signals from Sigma-Delta Modulation.
Original language | English |
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Publication status | Published - 1 May 2001 |
Event | 110th AES Convention - Amsterdam, Netherlands Duration: 12 May 2001 → 15 May 2001 |
Conference
Conference | 110th AES Convention |
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Country/Territory | Netherlands |
City | Amsterdam |
Period | 12/05/01 → 15/05/01 |
Keywords
- digital audio power amplifier
- high output power
- Sigma-Delta modulation