PROPOSAL OF NONLINEARITY COMPENSATION CIRCUIT FOR DRIVER OF DIGITAL DIRECT-DRIVEN SPEAKER SYSTEM

Abstract

We propose compensation circuits to reduce noise caused by nonlinearly influence on driver circuit used for digital direct-driven speaker system. The proposed architecture suppresses the mismatch effect of the driver circuit when segmented pulse shaping technique. It achieves to improve the stability of the whole system and reduce out band quantization noise by about 10 dB. Also, when implemented in field programmable gate array, the number of look-up table uses is reduced by 49% and flip-flop usage by 24% than a conventional approach

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