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How to decide offset frequency in phase noise?
Hi,
I have relaxation oscillator(ROSC) as reference clock for PLL. Based on PSS/Pnoise simulation of ROSC, I have ~3ns of RMS jitter if I integrate phase noise from 1KHz to 1MHz of offset frequency. Most of them are contributed by below 100KHz of...
Guys,
I need to design 12Bit 1MSps SAR ADC with input having of 0~VDD range and 20KHz. Input will be coming from selection MUX. Can single-ended topology cover for this spec or should go with fully differential topology?
And if I pick fully differential topology, I need to...
quantization in matlab
I have simple 1st order sigma delta ADC in simulink and I want to have quantization noise with changing to input. Any comment or some example of matlab codes or simulink files, and any sources will be helpful to me.
For AC analysis, first find bias point of your circuit and use them for your AC simulation because bias points in your circuit will not be changed for AC analysis.
It is really hard to tell we can believe extracted spice models of parasitic bipolar from fabs. The best we can do(I believe it is) is make your own spice models(esp. critical parameters) from your lab by testing with simple circuit and then use these parameters for your spice simulation. That...
Main idea is coming from mixed signal implemented in same die.
Digital circuit is very noisy and is coupled to analog side through substrate.
So, we need analog circuit, esp. references to be isolated from substrate.
The ways are dependent on technology. For example, we are using CMOS Nwell...
Thanks wenadinho but my bit stream is from chip in Lab. And I am using Matlab to make plot PSD with the data. It is not done on spice-like simulator.
Any idea?:idea:
Guys, please help me clear this issue.
I have a bit stream from sigma delta and input is DC.
I am using straight FFT and periodogram(or walsh) to plot PSD.
But flicker noise does not appear on my PSD.(It should be in)
I think there is a way to plot 1/f noise for DC input.
Please let me know.
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