• DocumentCode
    439583
  • Title

    Variable gain amplifier for dual mode WCDMA/GSM receivers

  • Author

    Mostafa, Mohamed A I ; Embabi, Sherif H K ; Elmala, Mostafa

  • Author_Institution
    Texas Instruments, Inc., Wireless Communications, Business Unit
  • fYear
    2001
  • fDate
    18-20 Sept. 2001
  • Firstpage
    53
  • Lastpage
    56
  • Abstract
    A Variable Gain Amplifier (VGA) is designed for a WCDMA/GSM subsampling receiver. The VGA is implemented in a 0.35µm CMOS process and approximately occupies 0.8mm2It operates at an IF frequency of 246MHz. The VGA provides a 60dB digitally controlled gain range in 2dB steps. The overall gain accuracy is less than 0.3dB. The current is 9mA at 3V supply. The noise figure at maximum gain is 8.7dB. The IIP3 is -4dBm at minimum gain, while the OIP3 is - 1 dBm at maximum gain. The group delay for 5MHz bandwidth is 1.5ns. The performance of this VGA makes it usable for multimode applications.
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Solid-State Circuits Conference, 2001. ESSCIRC 2001. Proceedings of the 27th European
  • Conference_Location
    Villach, Austria
  • Type

    conf

  • Filename
    1471332
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=439583