Corpus ID: 17870323

Design of a 3 rd Order 1 . 5-bit Continuous-Time ( CT ) Sigma-Delta ( ΣΔ ) Modulator Optimized for Class D Audio Power Amplifier

@inproceedings{MeloDesignOA,
  title={Design of a 3 rd Order 1 . 5-bit Continuous-Time ( CT ) Sigma-Delta ( ΣΔ ) Modulator Optimized for Class D Audio Power Amplifier},
  author={J. V. D. Melo and N. Paulino}
}
This paper presents a 3rd order 1.5-bit ΣΔ modulator with distributed feedback and local resonator feedback for a Class D audio amplifier. In order to improve the signal-to-noiseand-distortion ratio (SNDR), without increasing the oversampling ratio (OSR) or the order of the modulator, the modulator uses transmission zeros and 1.5-bit quantization. High level simulations of the modulator architecture show that it has a maximum SNDR value of 81 dB, for a signal bandwidth of 18 kHz and a sampling… CONTINUE READING
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