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Recent content by mbyoussef

  1. M

    communication principal (Please help)

    a) fLO = 455K + 540K --> 455K + 1600K, fIMAGE = 2*455K + 540K --> 2*455K + 1600K b) fLO = 540K - 455K --> 1600K - 455K c) High side injection is recommended because in this case the ratio fLOmax / fLOmin is smaller
  2. M

    input impedance of a passive mixer

    Re: input impedance of mixer Mixers are linear time variant networks. AC analysis is valid once a steady-state operating point is found => PSS/PAC is valid for mixer simulation
  3. M

    How to calculate EVM from IQ phase imbalance?

    You can find the effect of I/Q mismatch on EVM in the attached figure
  4. M

    wideband LNA design technique

    There is a good paper on Wideband LNAs in CICC 2006 By S. Chehrazi and A. Abidi.
  5. M

    Common mode to differential mode

    C5 (or C6) is a bypass cap. C1, C2, and L1 form the matching network for the LNA. The differential LNA has one of its inputs AC grounded.
  6. M

    question about the CMOS LNA IC measurement

    In Friis equation the NF of the output buffer is referred to a source impedance = 50 Ω, so you don't need to worry about the difference in loading.
  7. M

    Open loop vco aging and the frequency variation

    Re: open loop vco ageing There are models for aging.
  8. M

    Help with the resolution of si-based oscillator

    what is "si" ?
  9. M

    Noise Corner Frequency - Spectre

    1/f noise corner frequency simulation I don't think you can get it directly from Cadence. You have to plot the output noise spectrum and then find the intersection of the extrapolated 1/f and white noise lines.
  10. M

    Fully Differential Folded Cascode OTA With SC-CMFB design

    cmfb folded cascode Why don't you use dummy switches to minimize the effect of charge injection?
  11. M

    A problem on PLL puzzle me, pls help !

    What is the range of the output frequency and how much is your reference frequency?
  12. M

    Dummy transistors - their role in a circuit

    Re: Dummy transistors They are also used to account for the edge proximity effect and well proximity effect
  13. M

    mos differential amplifier

    design differential amplifier with mos Diff pairs are the starting point to understand Op-Amps
  14. M

    question about RC osillator

    The two inverters that have the same input and ouput levels will switch causing the structure to oscillate since the number of inverters is odd.
  15. M

    Which layout pattern has the best matching?

    C has M1 and M2 arranged in a common centroid layout.
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