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  1. Closed: Good lecture notes or resources for display technology (circuit design)

    Does anybody know good lecture notes (available) online on the intro of display technology with circuit design emphasis?

    Maybe I am searching for the wrong terms but I can't find something really...
  2. Closed: 25% vs 50% Duty Cycle, passive I/Q Downconversion mixer

    Hi,

    Until yesterday I would have bet everything that a passive mixer, driven by 25% duty cycle gets rid of the 3rd, 7th, 9th etc harmonic; while the 50% version has all odd-order harmonics. I...
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    Closed: Re: Simple Diff Pair Nonlinearity

    Hi,



    This is the first time I hear the term input and output nonlinearity (I have taken many advanced circuits and RF courses which all covered nonlinearity).
    Can you elaborate what you mean...
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    Closed: Simple Diff Pair Nonlinearity

    I have a simple MOS diff pair with MOS loads and self biased output common mode in a 28nm process.
    For example: input pair NMOS, loads: PMOS (gates connected to drain via high resistance for setting...
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    Closed: Typical differential input impedance for IC

    The typical impedance used in RF is 50 Ohm and if I build an RFIC with a "RFIN" pin I can expect its source impedance to be 50 Ohm.

    However, how does the situation look like in a differential...
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    Closed: Buffer stage: CD vs CS

    Hi,

    I need to add a buffer stage to my OTA design to make it an op amp. My design will be in 28nm VDDnom=1V (but I increase to 1.2V).

    Until now, when I heard buffer I always thought about CD...
  7. Closed: Nonlinear resistor: behavioral model (multi-dim Taylor series)

    Hi,

    Does spectre/Cadence support something like an ideal current or voltage multiplier block or anything I could simulate this nonlinear behavior?

    I would like to build a behavioral model of...
  8. [SOLVED]Closed: Re: calculation of input and output impedance using feedback technique

    Have you looked at Blackman's impedance formula already? Otherwise just connect a test current source where A1 is and measure the voltage at the gate?
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    Closed: Nonlinearity in fully differential circuit

    Hi,

    Consider the following two circuits, being an integrator with identical component values (R, C, OpAmp impedances, gain, ...) in its single-ended and fully differential version (the amplifier...
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    Closed: Re: Using VCO instead of PLL (Drift of a VCO)

    Ok, thank you. To summarize: An LC-oscillator based LCO has no frequency stability in practice due to temperature drift.

    Reason: As mentioned, the exact frequency does not matter in my application...
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    Closed: Using VCO instead of PLL (Drift of a VCO)

    I have a very system-level question: If, in my application, the synthesized frequency does not to be precise but it would be sufficient to know the actual frequency (e.g. by measuring it): Can I get...
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    Closed: Re: Matching (maximum power transfer), NF

    Hi,



    I really do appreciate your responses a lot and I value your time a lot which you put into following my thoughts and answering to them ... but it is no reason to become impolite. You...
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    Closed: Re: Matching (maximum power transfer), NF

    Ok, thank you. As others indicated in that topic ... it's also the first time for me that I hear this distinction.
    But it makes sense.

    So having \Gamma_V \neq 0 implies linear distortion. From a...
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    Closed: Re: Matching (maximum power transfer), NF

    Sure, this is just an example. Say it can be 1k or 10k. Then it is still close to 100%. I just want to understand if there is a problem if I just maximize Rin (or |Zin| for that matter).


    ...
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    Closed: Re: Matching (maximum power transfer), NF

    Ok, thanks for your answers, I'll try it again.


    Signal source (modeled as voltage source) with 50 ohm in series



    ok, thanks
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    Closed: Matching (maximum power transfer), NF

    Hi,

    I understanding Frie's equation, maximum power theorem etc for a conventional receiver. However, do I understand it right that all this is based on the fact that we assume a given input power?...
  17. Closed: Trivially: pnoise start/stop for downconversion mixer

    I have a downconversion mixer (fc = 2.1 GHz, BW=800 Mhz, i.e. f = 1.7 ... 2.5 GHz). For the reference side band I set -1.

    The absolute start/stop frequency in pnoise, would I set it to 1k ... 400M...
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    Closed: Is this system stable?

    Hi,

    I've build an RC integrator (28nm CMOS): A nonideal current source is sunk into an OTA with an integration cap in feedback. fu=400MHz, DC gain~73.38dB.

    The step response looks as expected...
  19. Closed: Re: Simple question: Is Saleh model small signal/large signal?

    Can I come back again to this answer? Is there a simple way to convert AC magnitude to instantaneous value?

    Specifically, I would like to use the model on a modulated RF signal rather than a...
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    Closed: Re: Feedforward: What am I missing?

    Remarks:
    * If my post is too confusing please let me know
    * If anyone has already used feedforward compensation and what I write sounds correct ... knowing this would already help me too!
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    Closed: Feedforward: What am I missing?

    Hi,

    I wanna build 2-stage OpAmp with feedforward compensation.

    Let me start with the basics: Let's assume I have two ideal transistors with intrinsic gains a1,a2 and certain GBW1,GBW2. Let's...
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    Closed: Re: What is Normalized Phase Noise?

    Ok, great, thanks again!

    Let me me show the concrete example where I see the inconsistency:

    http://snag.gy/1zAbZ.jpg

    Different noise levels are annotated, along with the loop bandwidth...
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    Closed: Re: What is Normalized Phase Noise?

    This is really helpful and great, thanks!

    To make sure: PLL_BW is not the loop BW of the PLL or so but the actual signal bandwidth of the receiver? And fpfd is the frequency at the phase detector...
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    Closed: Re: What is Normalized Phase Noise?

    Thank you!

    However, this seems like a completely useless metric to me because it just gives a hint about one single point at the phase noise figure L(f).

    Suppose I need 100fs RMS jitter at 2...
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    Closed: What is Normalized Phase Noise?

    Trivial question: What is "Normalized Phase Noise" for PLLs?

    For example, in http://www.ti.com/lsds/ti/clock-and-timing/rf-plls-and-synthesizers-products.page , this number is in dBc/Hz and ranges...
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