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16 Threads found on edaboard.com: Ads And Pll
Hi ads-ee, Thank you for your reply. I have grouped the CLKA and CLKB in the same group when I give asynchronous group constraints ("set_clock_group -asynchronous -group {CLKA CLKB} -group {CLKC}"). So my doubt is whether I am missing any other constraints between CLKA and CLKB domains.
Hi Everyone; Am new with ads and i wanted to make a pll, i tried a lot, really a lot, but i still can't get it working normally, i tried with the DesignGuide, and i can't fix my out Frequency to 5 Ghz. Can someone please help a little with the design of a simple pll in ads, or some (...)
there is a pll component option in pallete of ads. there u can find all the components like VCO and all for designing an pll..!! I couldn t figure out yet how to design a pll but u can get ur VCO block there ..@@
Can't you simply replace the VCO from the already available VCO divide-by-N block by your VCO? Sorry, I know neither the construction of this block nor the ads 2009 design system.
In my opinion, ads is also very good starting point for system level pll simulations.All necessary blocks are including in its' libraries.
Dear All,,, I've simulated envelope in my pll design and got this error message. Anyone can tell me what is thi thx,,,
Hello guys,,, Could you help me please,,, I want to design pll for mobile wimax application,,, could u give me step by step instruction how to design this. tutorial and/ or papers would be preferable. and i've searching for logic gate and D fli-flop component in ads, but i've found nothing. (...)
I am making a pll PhaseNoise Response simulation with ads(Model from DesignGuide). Can any one kindly help me to explain the expressions in the data display window (Fig 1) ?? They are too complex to understand. Beacause some variables have not been defined in anywhere ~~ and I don't know the appropriate parameters to (...)
I use ads to simulate the pll phase noise response(sample of design guide). The synthesizer IC is ADF4111 which phase noise floor is -215 dBc/Hz. I don't know what number to asign to the variables pointing out in the schemetic ,as attached. and I can't get those data from ADI co.
Dear Si r: I think ads is better. Becasue the pll , the trend is All-digital pll. and now the performance is good . The future pll will into All-digital pll.
You can try to simulate it in ads using the ptolomy with ENV method. Please be sure noise sources are included in your pll blocks.
Hi all Could anyone help me in modelling a frequency divider using ads? or knowing a block which already divide frequencies. N.B.: I wanna this thing for making a pll(PFD-CP) with square wave Reference input Regards
hi i am currentlu doing a pll design in ads. I have done the same design in Microwave office and it worked. but the design in ads is giving some timestep errors. pls help.
Hi to all, I have designed a ring oscillator in ads and I simulate its phase noise using harmonic balance analysis. When I use the specific oscillator in a pll, with a divider, phase detector and filter, I want to simulate the resulting phase noise in its output. However this is not possible in ads using (...)
pll low jitter 1 to 3GHz i donot know the frequency so my thinking is correct or not for you? 1 for cmos ic, use 2 inverters type osilator (in ads you can find as saple) i experienced to design colpitts type, unfortunately phase noise was huge because of Vdd and bulk noise 2 phase noiseepends on Hz/1V :: considering the (...)