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I've just finished the SD modulator.Because of my poor verilog about filter,i want to find some tools which can provide ideal DAC and simulate my .tran file by spectre directly.
i am studying the SD2mod.mdl of the SDtoolbox.the third question is the ADC-DAC block.what's DAClevelREAL and the selector after it?please tell me if someone knows.
and then,sin(x)=x if x is very little.but i can't understand why the part of cos() is equal.
Added after 36 minutes:
the second question is what's the difference between discrete integrator without and with delay.i just know the one without delay.
simulatedsm function in delsig
thaks,naalald
hi,shiveshdubey
did you calculate the clockjitter's formula which is label(1) in his IEEE paper?i think the part of 'cos' is cos[pi*f(2t+delta)],not cos(2*pi*f*t).maybe it can be equal approximately but i dont know the reason.
simulink model for sdm adc
OK.finally,i give up the demo.i download the toolbox from mathworks.there are two toolboxs,delsig and SDtoolbox.it's easy to use the SDtoolbox by adding the path.but i have trouble in delsig.i type the 'delsig' at the Matlab prompt but it dosen't work.
Added after 1...
murmann sc noise spectre
i followed the simulink demo'dspsdadc' in R14 and try to modify the first FIR Decimation to CIC Decimation.some errors was reported when i started the simultion.but i have no idea about it.
And i think this model is different from what i‘ve designed.my intergal is...
i followed the simulink demo'dspsdadc' in R14 and try to modify the first FIR Decimation to CIC Decimation.some errors was reported when i started the simultion.but i have no idea about it.So could you help me?
murmann spectre
i have added blocks in my model.but i can change the parameters of the CIC Decimation bolck and FIR Decimation block.e.g.i want to change the Decimation factor (R) of CIC block. maybe somethings should be installed.but i dont know in detail.
sdtoolbox
Hi,shiveshdubey
i just can make the model in simulink,but i know little about the toolbox. i even dont know the procedure about the simulation.can you tell me more detail?
delsig adc
thanks,YUANHUI
my understanding about SDM is that the STF and NTF is not the same because the path they cross is different.So the signal is just delayed and the inband noise is supressed.
the simulation about SDM in spectre at transistor level is too slow.but i'm not good at...
sdadc .mdl
i have read the allen's book about the ad/da.So i want to design the circuit and simulation for it.but i donnt know how to start.the software i know is cadence and matlab.and i know use the verilog-a to design the DAC and the verilog to decimator and filter.But i am not sure...
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