New concept for class D audio amplifiers for lower cost and better performance
IEEE Trans. Consumer Electronics（2011）
摘要
This paper presents new concepts for class D amplifiers and similar circuits that improve performance. Inductor current ripple and current stress in output power semiconductors are reduced, decreasing conduction loss and reducing flux density in the magnetics. This also implies decreased weight and size of the output filter and potentially smaller heatsink. Current ripple cancellation also potentially allows lowering switching frequency for higher efficiency without design limitation of a large current ripple in conventional circuits.
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关键词
green technology,thd,power semiconductor devices,class d audio amplifiers,power semiconductors,class D audio amplifiers,output filter,audio-frequency amplifiers,power amplifiers,low-pass filters,inductor current ripple cancellation,flux density,current stress,sampling frequency,output power semiconductor,environmental factors,class d amplifier,heatsink,system bandwidth,efficiency improvement,audio signal processing,switching circuits,currentripple cancellation,coupled inductors,switching frequency
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