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Recent content by meseasky

  1. M

    Requirements for the tuning linearity of VCO

    Hey guys My question is about the tuning linearity of a VCO, in the application of PLLs or frequency synthesizers, are there clear quantitative requirements on the tuning linearity of VCO, like the requirements on phase noise The more linear the better, sure, but that is too ambiguous... I...
  2. M

    about noise analysis of vco

    ADS is good and convenient, but i believe SpectreRF is more accurate.
  3. M

    how to get the phase accuracy of a quadrature VCO in Spectre

    I have some troubles in simulating the quadrature accuracy of a QVCO... it's said in papers that we can use a SSB mixer to up convert a baseband signal with the I/Q signal, and then get the image rejection ratio, which is a good criteria to evaluate the quadrature accuracy. But how should i do...
  4. M

    Beginner in analog circuit design

    analog circuit design at beginner level B.Razavi P.E.ALLEN P.R Gray Three bibles in Analog IC Design
  5. M

    What does the GND symbol mean?

    in an circuit diagram, the non-inverting input of an OPA is grounded, does it mean that the non-inverting input is really grounded or its input is Common Mode Voltage? i am really confused here, may you tell me what does the GND symbol mean? thanks!
  6. M

    Output resistance of single transistor

    what is the self cascode? how?
  7. M

    a fundamental but tricky question on feedback

    i think your diagram doesnt really represent the circuit. BETA is R1/(R1+R2), but the input in your diagram is in fact R2/(R1+R2)*Vin, and with these expressions you can get your -R2/R1 i think you should find the transfer function of this circuit, without the "virtual ground " approximation.
  8. M

    how to simulate the cutoff frequency of MOS with spice?

    spice cut off frequency thank you Nick, but what if i want to know the intrinsic cutoff frequency of a MOSFET? i mean there might be some methods to mesure it, i really want a circuit.
  9. M

    how to simulate the cutoff frequency of MOS with spice?

    spice frequency cut-off simulation can any body give me an example? a circuit or a netlist Thanks!
  10. M

    want Design material on OTA

    visit **broken link removed** there you can download the slides of "CMOS Analog IC Design Short Course" of P.E.ALLEN i hope it ll help you
  11. M

    What's the equivalent resistance across R1 in this circuit ?

    Re: a circuit question if all the resistors in the network are the same, i think the equivalent R is R1/4 you can put the pb in this way: as the network is infinit, at point A, the 4 directions are all the same, so with an input current of Iin at A, there will be only 1/4 Iin going through R1...
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