• DocumentCode
    3491663
  • Title

    A CMOS Chopper Offset-Stabilized Opamp

  • Author

    Witte, Johan F. ; Makinwa, Kofi A A ; Huijsing, Johan H.

  • Author_Institution
    DIMES, Delft Univ. of Technol.
  • fYear
    2006
  • fDate
    Sept. 2006
  • Firstpage
    360
  • Lastpage
    363
  • Abstract
    In this paper we introduce an offset-stabilized operational amplifier that uses a chopper amplifier in a low frequency path to cancel the offset of a wide-bandwidth amplifier. A sample-and-hold circuit is used to reduce the chopper ripple, and the low frequency path is also offset-stabilized to further reduce the residual offset. The amplifier has 1muV offset at a 4 kHz chopper frequency, and a unity gain frequency of 1.3MHz with a 50pF load. The amplifier was realized in a 0.7mum CMOS process, and has an effective chip area of 3.6mm2
  • Keywords
    CMOS integrated circuits; operational amplifiers; sample and hold circuits; 0.7 micron; 1 muV; 1.3 MHz; 4 kHz; 50 pF; CMOS process; chopper amplifier; offset-stabilized operational amplifier; sample-and-hold circuit; wide-bandwidth amplifier; Bandwidth; Broadband amplifiers; CMOS technology; Choppers; Circuits; Frequency; Low-frequency noise; Low-noise amplifiers; Operational amplifiers; Voltage;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Solid-State Circuits Conference, 2006. ESSCIRC 2006. Proceedings of the 32nd European
  • Conference_Location
    Montreux
  • ISSN
    1930-8833
  • Print_ISBN
    1-4244-0303-0
  • Type

    conf

  • DOI
    10.1109/ESSCIR.2006.307605
  • Filename
    4099778
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=3491663