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I'm simulation the NF of a down conversion mixer using pss&pnoise simulations. The attached graph is the output of the simulation. The shape of the curve is very strange from what I'had expected. I was expecting the mirror of this graph..Am I right or I've missed something that makes this...
I've used gm/Id efficiently sizing a diff amp , the problem now is to size a triode mosfets.gm/Id isn't applicable to design for required Ron for transistors in the triode region.
Dear ZekeR,
Thanks for ur reply, You have mentioned 3 methods here
the Ids/Vds curves u have mentioned, you mean to plot these curves based on the result saved from sweeping a current source(attached to the drain of a Mosfet).. then getting Vds ..and plot it vs Ids for different channel...
Sizing a switched capacitor circuit using gm/Id
Hi Everyone,
I've used gm/Id for sizing a diff amp before. Now I'm sizing a switched capacitor. But I only have the required Ron of the Mos switch and I don't know how to use this only info "Ron" to use the curves of gm/Id methodology. Thus I...
Dear Friends ,
Designing an LTE receiver to oberate on band 40 (2.3-2.4GHz).I've faced an issue concerned with the freq to be used by the mixer .I'm a little bit confused of taking 2.3Ghz as a freq from the VCO .I'm designing a Zero-IF Arch.
I aim to use a mixer with 2.3GHz to down-convert...
Dear GoldSmith,
By LTE receiver i mean the RF front end of a wireless receiver for mobile set (UE ).
Thanks for ur concern:)
---------- Post added at 08:22 ---------- Previous post was at 08:01 ----------
Dear RFDave,
Thanks for ur reply , You're post is rich of resources .I think that ISSCC...
Dear RFDave,
thanks for ur reply. Actually the problem for me was the amount of attenuation needed by filters.As i've known, attenuating the blocker signal to be equal to the noise floor of the receiver will be enough ,is that ok? I think the same thing for adjacent channel selectivity.
I've found that all his reasearch interest is Security in "Computing and Communications,Signal Processing, Machine Learning, and Optimization"
& this is not what i want i speak about the front end (RF part) of the receiver , Anyway thanks for help:)
Inquiry: System Calculation Book For Wireless RX
Dear All,
I'm working on designing an LTE receiver. I'm searching for a book that can help me in system calculations .as i'm currently in the system level step.
Could anyone give me a hand in this by advising a specific title for some kind...
Really Appreyiate your help :) ,
This is the main point that confuse me in the standard and many textbooks .
Now I'm designing a Receiver ,Why am i talking about testing??
Isn't testing is a final step in designing a system to be sure that it meets the specs that i've put in the first phase...
Thanks for your replies,
I'm confused about applying a useful signal ,how can i apply a useful signal to the received signal?? isn't that related to the specs of a transmitter PA?
I think that i misunderstood what u typed.Could you make a bit clearer :)
---------- Post added at 16:02...
Dear friends ,
While putting down the specs for an LTE receiver,I found a problem in the blocking requirements.
In the 3gpp stadnadrd , I found a table named narrow band blocker.but i cannot find the upper limit for the power of the blocker that the receiver should sustain .all text book...
The adjacent channel power in the standard of LTE is assumed to be 45dB above the reference sensitivity. the question is : Is that value of power is just for testing or for real case .Let me say it in another words,for a different power level of the adjacent channel do i need to...
Dear All,
I'm facing a little problem in the system design for Front-end wireless receiver. I'm searching for any way of calculating the Adjacent channel selectivity (ACS). the IEEE standards for any technology mention the value directly e.g LTE 33dB.I need to know how to calculate such value...
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