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首页> 外文期刊>Circuits, systems, and signal processing >System-Level Power Optimization of Digital Audio Back End for Hearing Aids
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System-Level Power Optimization of Digital Audio Back End for Hearing Aids

机译：用于助听器的数字音频后端的系统级功率优化

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This work deals with power optimization of the audio processing back end for hearing aids-the interpolation filter, the sigma-delta ( modulator and the Class D power amplifier (PA) as a whole. Specifications are derived, and insight into the trade-offs involved is used to optimize the interpolation filter and the modulator on the system level so that the switching frequency of the Class D PA-the main power consumer in the back end-is minimized. A figure-of-merit which allows judging the power consumption of the digital part of the back end early in the design process is used to track the hardware and power demands as the trade-offs of the system-level parameters are investigated. The result is the digital part of the back end optimized with respect to power which provides audio performance comparable to state-of-the-art. A combination of system-level parameters leading to the lowest switching frequency of the Class D power amplifier reported in the literature for the modulator-based back end is derived using this approach.
机译：这项工作主要涉及助听器音频处理后端的功率优化-内插滤波器，sigma-delta（调制器和D类功率放大器（PA）的整体）。推导了规格并了解了折衷方案所涉及的用于优化系统级的插值滤波器和调制器，以使D类PA（后端的主要功耗）的开关频率最小化。在设计过程的早期阶段，对后端数字部分的跟踪用于跟踪硬件和电源需求，同时研究了系统级参数的折衷方案，结果是针对以下方面对后端数字部分进行了优化：系统级参数的组合导致D类功率放大器的最低开关频率在文献中针对基于调制器的ba ck end是使用这种方法得出的。

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