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Recent content by analog_guru

  1. A

    How does gain-boosting effect to output swing?

    0.18micron folded cascode amplifier In general, and unless you really know what you are doing, all transistors need to be in saturation. Given this in mind, the output swing will be calculated. To change from a folded cascode to gain boosting, the output of the gain boosting opamps should...
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    Vds, Vgs, Vdsat of PMOS?

    pmos vt versus vds You are right shockie in all both of your assumptions. i.e., subtract the abs. value of those from Vdd.
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    Commercial pipeline ADC without sample/hold (or track/hold)

    Re: Commercial pipeline ADC without sample/hold (or track/ho Thanks but I could not find their detailed data sheets. Any idea on how I can get them?
  4. A

    Commercial pipeline ADC without sample/hold (or track/hold)

    adc without sh Does any one know of a commercial Pipeline ADC without a dedicated S/H at its input?
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    Corner analysis & Process variation?

    nmos library corner analysis Both are correct openions. In general, if you want to use a general process such as TSMC 0.18u, for example, you would not know what corner your chip will be processed with. This is one reason why this is one of the cheapest processes. It is also true that you can...
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    question about PLL jitter

    You need to look at the whole picture to determine what the charge pump current should be. The place to start is the PLL bandwidth. You need to consult any PLL book to find what the bandwidth of the PLL is (I mean the equation). What you will find is that the BW is a function of the Kc (charge...
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    Corner analysis & Process variation?

    corner fff and sss Corner analysis and process variation simulations are important in the design and especially for analog designers. The question about how many corners you want to simulate is the similar to asking how many Montecarlo runs to do I need to run ( I assume you know what...
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    how to simulate P1db and ip3 of LNA using HSPICE?

    Here is a link. Hope this helps... https://www.designers-guide.org/Analysis/intercept-point.pdf
  9. A

    FFT from eda software output

    Most probably not. First, In cadence, you may want to start the dft from the second sampled point. I do not know why cadence will require that, but that is what I found out. Second, you need to provide a window type; hanning, blackmann or any othertype. If you have a periodic signal that you are...
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    How to simulate frequency offset in Matlab between transmitter and receiver?

    Re: help matlab Well, here is the answer of the offset frequency. If there could be an offset between a transmitter and a receiver, then the design should be tolerable to it. This can be done by using a PLL or a DLL whose bandwidth is greater than that offset frequency. Recovery is not a simple...
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    FFT from eda software output

    "sample" is the name of the function. "waveform" is the name of the signal that you want to sample. "from" is the time you want to start sampling. "to" is the time you want to stop the sampling. "linear" is the type of sampling. Compare this to logscale, for example. "by" is the sampling step...
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    FFT from eda software output

    Discrete-Time Signal Processing by Alan V. Oppenheim, Ronald W. Schafer, John R. Buck Designers and Scientists guide for Digital signal processing.. Those are the ones I can think of now.. Hope that helps....
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    How to calculate impedances at nodes ina circuit in HSPICE

    Re: How to calculate impedances at nodes ina circuit in HSPI This is very basic circuit question!.. This is called Thevenin equivalent!
  14. A

    Parametric analysis with Spectre simulator and Ocean script

    spectre parametric analysis This does not look to me a spectre netlist...It looks like it is an hspice one!
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    anyone tell wether the ocean use Hspice to simulate ?

    I think ocean should work with any simulator and you should specify that the first thing in ocean as: simulator('spectre) ... for spectre,So, I assume you will do the same for hspice. I have not used hspice with ocean before, but that is my guess. Having said that, you might be having syntax...
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