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Recent content by Alex_IC

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    Ansoft Designer SV, GPCS

    Hi! How to plot operation power gain circles on a Smith chart in Ansoft Designer SV? Is it possible? Tnx
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    Lecture notes for UC berkeley EE142 by Niknejad

    **broken link removed**
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    Complex avaible source power

    Pavs.rms=(Vs.rms^2)/4*Zs and Pavs.rms=(Vs.peak^2)/8*Zs so is Vs peak value or RMS value in the lecture? It seems to me it should be peak value and this results in my confusing about words "the factor of 4 instead of 8 is used since we are now dealing with complex power". Again there is an Eq...
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    [SOLVED] LNA noise matching (physical insight)

    It is easeir to understand this at low freq. Circuits may exibit more noise current or more noise voltage. Thus input noise depends on the resistance of the source. For low source resistance the noise current will have little effect but noise voltage will be dominant. For high source resistance...
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    Complex avaible source power

    Hello! I am reading Niknejad's lecture and wonder of p.15, why "the factor of 4 instead of 8 is used since we are now dealing with complex power"? May be the factor 2 should be because of RMS value used in equation for Pin (V1 and I1 are RMS) and actually Pavs=Vs.rms^2/(4*Zo)? Tnx for reply!
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    E5052B, noise figure measurement

    Hi! Is it possible to measure noise figure (say of amplifier or mixer) with E5052B?
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    PN measurement of freq div

    Thanks for reply. But what should be the phase shift? Should it be exactly 90 degrees?
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    PN measurement of freq div

    Hi! How to measure phase noise of a static frequency divider if I have E5052B but don't have a generator with pn better than -120 dBc/Hz ? Could somebody suggest a paper or book to know how to do that.. Thanks for help!
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    ADS HB small signal mixer simulation

    mixer simulation ads Hello! Give me please an example of mixer HB small signal simulation (actually sim controller setting). Thx
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    dishing of shallow trench isolation

    How mach it important? What will happen if I violate the density rules leading to dishing of shallow trench isolation?
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    is it possible to make XVCO from LC VCO ?

    Re: XVCO from LC VCO To riziahm It could be a SAW resonator. The operation is the same.
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    is it possible to make XVCO from LC VCO ?

    Re: XVCO from LC VCO Thanks for reply, Let say I need +/-100 ppm variation of the frequency and the freq=400 MHz. Can I use the above circuit just replacing L by crystal ? Does temp stability degrade in this circuit dramaticcaly?
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    what have been done wrong during the measurements?

    You can place a lossy transmission line model before s2p element in ADS (with the result of manufacturer meaurements data) and tune parameters of the transmission line model to get the same result as yuor lab data. It seems like the data of manufacturer are deembeded and your data are not.
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    is it possible to make XVCO from LC VCO ?

    butler vco Hi! Is it possible to make a XVCO from LC VCO like in fig.1? To get XVCO I'm going to replace the L by crystal. Thank you!
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    RF passive MOSFET mixer (sub??)

    mosfet mixer Hello! I'm design RF passive ring MOSFET mixer on nmos. I'm confused where to connect substrate contact? Maybe leave it open...
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