Corpus ID: 15803725

Pulse Width Modulation for Class D Audio Power Amplifier with 85 % of Efficiency

  title={Pulse Width Modulation for Class D Audio Power Amplifier with 85 % of Efficiency},
  author={Ziani Messghati and Yassir Laghzizal and H. Qjidaa},
  • Ziani Messghati, Yassir Laghzizal, H. Qjidaa
  • Published 2010
  • Computer Science
  • In this paper a high efficiency PWM CMOS audio power amplifier is proposed. The original idea is based on the difference close-loop feedback technique and the difference pre-amp. Thus, we conceive a rail to rail comparator with a constant gm. This rail-to-rail PWM comparator with hysteresis architecture has been embedded in the audio power amplifier. The simulation results based on the TSMC 0.18μm CMOS process show that the power efficiency is 85%, the PSRR is –70 dB, the power supply voltage… CONTINUE READING


    PWM Power Audio Amplifier With Voltage/Current Mixed Feedback for High-Efficiency Speakers
    • 43
    A current-mode power sigma-delta modulator for audio applications
    • 23
    • Highly Influential
    Integrated overcurrent protection system for class-D audio power amplifiers
    • M. Berkhout
    • Engineering
    • IEEE Journal of Solid-State Circuits
    • 2005
    • 41
    Design of an integrated 20 W×2 class-D audio power amplifier in 0.8 _m BCD technology
    • Journal of Semiconductors,
    • 2008