• DocumentCode
    2272711
  • Title

    A highly integrated class-D amplifier using driver delay hysteresis control

  • Author

    Tai, Jia-Nan ; Chen, Hsin-Shu ; Chiu, Hang-Quei

  • Author_Institution
    Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
  • fYear
    2012
  • fDate
    23-25 April 2012
  • Firstpage
    1
  • Lastpage
    4
  • Abstract
    In this paper, a closed-loop class-D amplifier (CDA) simplifying circuit implementation on conventional hysteresis control is proposed. The functionality of hysteresis control is realized by comparator in conjunction with MOSFET propagation delay. The switching frequency variation is reduced by means of unmatched rising and falling edge delays. The prototype CDA chip is fabricated in 0.35-μm CMOS process and its active area is 0.2 mm2. The measurement results show that THD+N ratio is flat between 20 Hz and 20 kHz with all values below 0.03%. PSRR and SNR are 64 dB and 80 dB, respectively.
  • Keywords
    CMOS integrated circuits; MOSFET; amplifiers; closed loop systems; delays; hysteresis; CMOS process; MOSFET propagation delay; closed-loop class-D amplifier; driver delay hysteresis control; frequency 20 Hz to 20 kHz; size 0.35 mum; switching frequency variation; Delay; Hysteresis; Logic gates; Pulse width modulation; Switches; Switching frequency;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    VLSI Design, Automation, and Test (VLSI-DAT), 2012 International Symposium on
  • Conference_Location
    Hsinchu
  • ISSN
    PENDING
  • Print_ISBN
    978-1-4577-2080-2
  • Type

    conf

  • DOI
    10.1109/VLSI-DAT.2012.6212661
  • Filename
    6212661
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=2272711