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Do you need small signal noise in frequency domain ?zicothec said:can you give an example , how to use SDD(Symbolically Defined Devices) is ADS to generate noise
pancho_hideboo said:Do you need small signal noise in frequency domain ?
Or do you need large signal noise in time domain ?
Why don't you use the followings ?zicothec said:for the large and small signal
zicothec said:Thanks you, you gave me the help of ADS, but it's not helpful (for noise in SDD)
Can you give me an example plz?
:|
pancho_hideboo said:If you would like to use "SDD", use "SDD1P" with following settings.
I[1,0]=0
In[1,0]=I_Noise
I_Noise ; Noise Current in [A/sqrt(Hz)]
This realize same function as http://edocs.soco.agilent.com/display/ads2009/I+Noise+(Noise+Current+Source)
http://edocs.soco.agilent.com/displ...bolically+Defined+Devices,+1-12+and+14+Ports)
I think you have to use "freq" instead of "noisefreq".zicothec said:I have I_Noise=Kf*I/(1+noisefreq)
can I use the noisefreq gived by the HB simulator directly ?
pancho_hideboo said:I think you have to use "freq" instead of "noisefreq".zicothec said:I have I_Noise=Kf*I/(1+noisefreq)
can I use the noisefreq gived by the HB simulator directly ?
Why don't you use following inside SDD instead of In[1,0] ?
http://edocs.soco.agilent.com/display/ads2009/I+NoiseBD+(Bias-Dependent+Noise+Current+Source)
I use "I[1,0]" for describing nonlinear relation between V and I.
But I don't use "In[1,0]" for noise expression.
Instead I use "I_NoiseBD" parallel to port-1 of SDD1P.
What is "freqnoise" ?zicothec said:I have I_Noise=Kf*I(t)^Af/(1+freqnoise^Af)
and I(t)=Idc+Iac
But I don't think I(t) in noise expression does work in any analysis of Agilent ADS from principle of analysis engine.zicothec said:so I can't use directly the I_noiseBD, because the Ie is for dc current only
"freq" and "noisefreq" are both system variable in Agilent ADS.zicothec said:I Have HB.freq and HB.noisefreq, I know that I can use only freq in weighting factor.
No.zicothec said:I want also to simulate the phase noise so I implement the Low-Frequency noise sources in the transistor (these sources are cyclostanionnary i.e. dependents on time), so the Dc current must be replaced by the instantaneous current.
Cyclostatinary noise is expressed as correration in frequency domain.