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Recent content by vndjn

  1. V

    Problems when doing VCO phase noise simulation

    vco phase noise Hi, When i am doing vco phase noise simulation i am getting spurs at the offset frequency which is same to vco frequency and its multiple. I want to know why these refernce spurs coming in VCO phase noise plot. I am doing phase noise simulation only for VCO, not inculding any...
  2. V

    Why does a diode connected MOS should have an output resistance of 1/gm?

    Re: Diode connected MOS mos has two control for its current, one is vgs and other is vds. vgs control called transconductance "gm" and vds control called output impedance "ro" for mos generally gm*ro>>1, so ro>>(1/gm)... when you made diode conncted configuration gm and ro comes into parallel...
  3. V

    phase margin measurement from transient plot

    Thanks, from step response we know the overshoot and settling time, so i want to know can we get PM value by overshoot/settling.
  4. V

    The relation between slew rate and gm

    Re: slew rate vs gm Hi, Here gm is proportional to square root of Id. so effectively S.R. is proportional to square root of Id, which is obvious.
  5. V

    phase margin measurement from transient plot

    phase margin measurement Hi, Is there any function in icfb to meaure phase margin from transient plot. Thanks,
  6. V

    Help me with topology for a 7bit programmable frequency divider

    Hi, I want to design 7 bit programmable frequency divider, which can divide input from 1-127. input frequency i targeting is 1Ghz. can some one help me in topology.. Thanks,
  7. V

    design high speed level shifter

    but source follower can not give me the full swing.. There will be voltage drop acroos load..
  8. V

    Phase Noise in a PLL charge pump

    in the paper you can get how to do the phase noise analysis...
  9. V

    Is this a LPF ? What's cut-off freq

    this one is also stable circuit..
  10. V

    design high speed level shifter

    Can anyone tell how to design high speed up level shifter ~1GHz,
  11. V

    2.5V device at 1.8V supply

    What will be max frequency of operation for 2.5V devices operting at 1.8V, min. channel length is 0.28u and Vt~0.5V.
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