• DocumentCode
    446707
  • Title

    A dual phase SC CMFB circuit for double sampling modulators

  • Author

    Noman, Ahmed ; Dessouky, Mohamed ; Sharaf, Khaled

  • Author_Institution
    RFIC Group, Ain Shams Univ., Cairo, Egypt
  • Volume
    1
  • fYear
    2003
  • fDate
    27-30 Dec. 2003
  • Firstpage
    287
  • Abstract
    A dual phase switched capacitor common mode feedback (SC CMFB) circuit is proposed which is suitable for double sampling circuits. A 4th order SC bandpass sigma delta modulator designed in CMOS is used as a testbench to compare the proposed circuit to conventional SC CMFB. The proposed circuit achieves 33 dB better image rejection and enhances the SNDR over 200 kHz bandwidth compared to the same circuit then simulated with conventional single phase switched capacitor common mode feedback.
  • Keywords
    CMOS integrated circuits; band-pass filters; circuit feedback; sigma-delta modulation; switched capacitor networks; CMOS technology; bandpass sigma delta modulator; double sampling circuits; double sampling modulators; dual phase switched capacitor common mode feedback circuit; Bandwidth; Circuit testing; Delta modulation; Delta-sigma modulation; Feedback circuits; Image sampling; Phase modulation; Sampling methods; Switched capacitor circuits; Switching circuits;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Circuits and Systems, 2003 IEEE 46th Midwest Symposium on
  • ISSN
    1548-3746
  • Print_ISBN
    0-7803-8294-3
  • Type

    conf

  • DOI
    10.1109/MWSCAS.2003.1562275
  • Filename
    1562275
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=446707