Journal article
Hysteresis controller with constant switching frequency
Switch mode audio power amplifiers are showing up on market in still greater numbers because of advantages in form of high efficiency and low total system cost, especially for high power amplifiers. Several different modulator topologies have been made, ranging from standard PWM to various self-oscillating and digital modulators.
Performance in terms of low distortion, noise and dynamic range differs significantly with the modulator topology used. Highest system performance is generally achieved with analog modulators made as a modulator loop including at least the power stage of the amplifier, because of benefits from continuous time operation and non-quantized resolution.
This type of modulator uses no external carrier signal, and is called self-oscillating modulators. The work presented in this paper refers to switch mode audio power amplifier, but can be used within a wide range of DC-DC or DC-AC converters as well.
Language: | English |
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Publisher: | IEEE |
Year: | 2005 |
Pages: | 688-693 |
ISSN: | 15584127 and 00983063 |
Types: | Journal article |
DOI: | 10.1109/TCE.2005.1468020 |
ORCIDs: | Andersen, Michael Andreas E. |
Costs DC-AC converters DC-DC converter Digital modulation Dynamic range High power amplifiers Hysteresis PWM power convertors Pulse width modulation Switches Switching frequency System performance Topology audio-frequency amplifiers constant switching frequency digital modulators hysteresis hysteresis controller modulator topologies modulators power amplifiers self-oscillating modulators switch mode audio power amplifiers switched mode power supplies switching convertors