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wany
Joined: 18 Oct 2004
Posts: 46
Helped: 1
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 28 Apr 2005 4:58 how to simulate SNR of DAC in the candence |
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| i have gotten wave of dft . But i don't konw how i can get SNR. thanks your helps
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bad_egg3
Joined: 28 Apr 2005
Posts: 3
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29 Apr 2005 1:41 how to simulate SNR of DAC in the candence |
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| use cadence spw
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nibo_mmx
Joined: 10 Apr 2005
Posts: 23
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29 Apr 2005 2:07 Re: how to simulate SNR of DAC in the candence |
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bad_egg3:
Could you please give us more details about it. What's spw and how to set up it?
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29 Apr 2005 2:07 Ads |
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yibinhsieh
Joined: 25 Apr 2005
Posts: 196
Helped: 17
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29 Apr 2005 4:20 Re: how to simulate SNR of DAC in the candence |
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If you use Spectre to simulate your circuit, you can use the "calculator" to do it.
In the "special fucntion" of the calculator, there is a command of "DFT".
After you choose the command of "DFT", you can easily fill some items, like start time, end time, the point of DFT , and the window of DFT.
Then you can get the SNR.
Yibin.
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Analog_starter
Joined: 15 Nov 2004
Posts: 114
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29 Apr 2005 5:51 Re: how to simulate SNR of DAC in the candence |
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Hi, how can I do SNR simulation by Hspice ??
BTW, in spectre can I add .vec file into it ??
Thanks
Analog_starter
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nibo_mmx
Joined: 10 Apr 2005
Posts: 23
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29 Apr 2005 6:25 Re: how to simulate SNR of DAC in the candence |
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| I heard on said DFT could only see the distortion, SNR is related to noise analysis and should use something related to ac analysis. But I dont know how
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yibinhsieh
Joined: 25 Apr 2005
Posts: 196
Helped: 17
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30 Apr 2005 3:00 Re: how to simulate SNR of DAC in the candence |
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| Quote: |
nibo_mmx
I heard on said DFT could only see the distortion, SNR is related to noise analysis and should use something related to ac analysis. But I dont know how |
Yes. you are right. But we can get the quantization noise from the DFT.
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Analog_starter
Hi, how can I do SNR simulation by Hspice ??
BTW, in spectre can I add .vec file into it ?? |
First question: Using .fft command. Also you just get the quantization noise.
Second: I have no idea about it.
Yibin.
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wany
Joined: 18 Oct 2004
Posts: 46
Helped: 1
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03 May 2005 3:32 Re: how to simulate SNR of DAC in the candence |
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| You will get many quantization noise but you can't added it up use caculate
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analog_design
Joined: 22 Apr 2005
Posts: 34
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03 May 2005 3:51 how to simulate SNR of DAC in the candence |
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| How to simulate the SNR of DAC in the HSPICE?
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Analog_starter
Joined: 15 Nov 2004
Posts: 114
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04 May 2005 7:02 Re: how to simulate SNR of DAC in the candence |
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Yes, I also want to know. And for the SNR simulation, what input should add into? 1Mhz ideal digital sine wave codes? And what frequency should use for clock can get the highest SNR? higher clock higher SNR??
Thanks,
Analog_starter
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derekqiao
Joined: 11 Nov 2004
Posts: 49
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11 May 2005 7:04 Re: how to simulate SNR of DAC in the candence |
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Quote:
Analog_starter
Hi, how can I do SNR simulation by Hspice ??
BTW, in spectre can I add .vec file into it ??
Using .fft in hspice can do fft simulation and get THD. And .vec file can be used too.
But for SNR, i don't kown how to simulate it.
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