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Recent content by nxing

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    complex GM -C filter paper

    Hi MFahmy, Thanks for your reply! Yes, I am still interested in that paper. N.X. ---------- Post added 16-02-12 at 00:01 ---------- Previous post was 15-02-12 at 23:13 ---------- Hi MFalmy, You can send the paper to xingnw@yahoo.com. I real appreciate your help! Thanks! N.X
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    complex GM -C filter paper

    Hi I am looking for a paper: A CMOS complex Gm — C filter for low-IF bluetooth receiver. by:Fahmy, M.M. Mahmoud, S.A. it's appear on Microelectronics, 2008. ICM 2008. International Conference on Thanks NX
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    Charges on Switched Capacitor Circuit

    Hello I have a basic question regarding switched-capacitor integrator circuit, look at the attached drawing (from Paul Gray's book, chapter 6). on the top phase (sample phase), I am wondering what's the charge at right plate of C1? I am thinking because it's connected to ground (or any DC...
  4. N

    About Pipeline ADC and Sigma-delta ADC

    you need to come up spec first and then study the technology you will use , then it becomes easy to pick up the topology.
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    How to design a divider to divide a signal by 2.5?

    Hi, I need to design a divider to divide the signal by 2.5 ( the input signals are at around 4GHz), I would prefer the injection lock divider. Does anybody have any idea how to design that? or can refer to any papers regarding this matter? Thanks Norman
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    Looking for documents about Cadence Version Sync

    Hi, I am trying to study the version sync with Cadence, but can not find any documents either online or with Cadence. Can anybody give me a hint where I can find them? Thanks, nxing
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    differential CMOS source follower

    The reason is for the following block.
  8. N

    differential CMOS source follower

    Hi, Can anybody refer me a differential source followers circuit with common-mode feedback? I can not think one of them. Thanks Nxing
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    How to set up the test bench to measure PSRR of LNA?

    Hello everyone, I have an differential LNA and would like to measure it's PSRR. what I am thinking is that the measuring of a "pseudo single-ended LNA" 's PSRR make more sense. Does anybody can tell me how to set the test bench up? Thanks nxing
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    CMOS LNA problems - negative Z11 , stability issues

    LNA input impedance Hi Khouly, Sorry, the stability factor is actually less than one, indicating unstability. I just wondering what is the cause of this unstability, what I found is that if I lower the OUTPUT inductor's Q, the stability factor increased. Also I found that the Cgs of this...
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    CMOS LNA problems - negative Z11 , stability issues

    LNA input impedance Thanks for the reply, guys. For Yakeen: I don't see any problem with Vg, also, this is not a close loop. For Khouly: Actually, I check the stability factor and it's larger than 1 everywhere. Any other suggestions? Thanks
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    CMOS LNA problems - negative Z11 , stability issues

    LNA input impedance Hello everybody, I have a CMOS LNA and the topology is the classic cascode architecture with inductor degeneration at source of input device. what I find is that I can see a negative Z11 (real part) after the S-parameter analysis. Have anybody met the same problem? how come...
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    How to increase Q factor of LC tank

    q factor,lc yes, the method you use will decrease Q
  14. N

    Can divided_by_3 circuit get quadrature output?

    The short answer is Yes. However, it's not easy to have a balanced Quadrature output with div_3
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    An inquiry about biasing techniques for the LNA

    Actually, in LNA design, the absolute current is not that critical and I think the constant Gm curcuit will work.
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