• DocumentCode
    2679923
  • Title

    Effect of BJT’s parasitics on computing cells for analog decoders

  • Author

    Duchaux, Nicolas ; Lahuec, Cyril ; Seguin, Fabrice ; Arzel, Matthieu ; Jézéquel, Michel

  • Author_Institution
    Dept. Electron., TELECOM BRETAGNE, Brest
  • fYear
    2008
  • fDate
    22-25 June 2008
  • Firstpage
    301
  • Lastpage
    304
  • Abstract
    This paper analyzes the effect of inherent bipolar transistor parasitic elements on the computing nodes performance used in BJT analog decoders. It is shown that these undesirable effects significantly degrade, up to 85%, the conversion of Log-Likelihood Ratios into probabilities. This can lead to a wrong decoding outcome when complex computing nodes are designed. Simulation results are shown for a 0.25-mum BiCMOS process from NXP.
  • Keywords
    BiCMOS analogue integrated circuits; analogue multipliers; bipolar transistors; decoding; probability; BJT parasitics; BiCMOS process; Gilbert multiplier; NXP; analog decoders; bipolar transistor parasitic elements; computing cells; log-likelihood ratio; size 0.25 mum; AWGN; Analog computers; Binary codes; Bit error rate; Computational modeling; Decoding; Degradation; Integrated circuit modeling; Telecommunication computing; Voltage;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Circuits and Systems and TAISA Conference, 2008. NEWCAS-TAISA 2008. 2008 Joint 6th International IEEE Northeast Workshop on
  • Conference_Location
    Montreal, QC
  • Print_ISBN
    978-1-4244-2331-6
  • Electronic_ISBN
    978-1-4244-2332-3
  • Type

    conf

  • DOI
    10.1109/NEWCAS.2008.4606381
  • Filename
    4606381