SweepPlan:Coarse SweepPlan[1]="Coarse_seg1" SweepPlan[2]="Coarse__Fine"  
SweepPlan:Coarse__Fine Sort=no Reverse=no SweepPlan="Fine"
SweepPlan:Coarse_seg1 Start=-20 Stop=3 Step=1
Port:PORT1  in 0 Num=1  Z=50  Freq[1]=RFfreq-fspacing/2 Freq[2]=RFfreq+fspacing/2    P[1]=dbmtow(RFpower-3) P[2]=dbmtow(RFpower-3) Noise=yes Pac=polar(dbmtow(0),0)
rpolyrf_070608:X7  _net9020 rfin 0 _M=1 Ns=1 Np=1 wr=1 r=500 tc1=0 tc2=0 R1=0 R1multi=0 rpolyx=1
cmimrf_070608_mim_orig:X22  _net9016 0 0 _M=1 c=0.5p C1=0 C1multi=1 aratio=1.0 cmimx=1.0
cmimrf_070608_mim_orig:X46  _net9014 0 0 _M=1 c=0.5p C1=0 C1multi=1 aratio=1.0 cmimx=1.0
nmosvsrf_070608:M4  _net8972 rfin 0 0 mgate=120 W=10u L=0.11u lneck=0.4u LD2=0.58u KC=0.01603 KRo=62.4 KR=56.21622 KL=0.2519 KCGB=0.02 nddg=0 nsdg=2 Mmulti=1
nmosvsrf_070608:M6  _net9020 _net9020 0 0 mgate=8 W=10u L=0.11u lneck=0.4u LD2=0.58u KC=0.01603 KRo=62.4 KR=56.21622 KL=0.2519 KCGB=0.02 nddg=0 nsdg=2 Mmulti=1
nmosvsrf_070608:M5  vout _net9016 vout1 vout1 mgate=40 W=10u L=0.11u lneck=0.4u LD2=0.58u KC=0.01603 KRo=62.4 KR=56.21622 KL=0.2519 KCGB=0.02 nddg=0 nsdg=2 Mmulti=1
nmosvsrf_070608:M3  vout _net9014 vout1 vout1 mgate=72 W=10u L=0.11u lneck=0.4u LD2=0.58u KC=0.01603 KRo=62.4 KR=56.21622 KL=0.2519 KCGB=0.02 nddg=0 nsdg=2 Mmulti=1
nmosvsrf_070608:M8  0 0 0 0 mgate=4 W=10u L=0.11u lneck=0.4u LD2=0.58u KC=0.01603 KRo=62.4 KR=56.21622 KL=0.2519 KCGB=0.02 nddg=0 nsdg=2 Mmulti=1
nmosvsrf_070608:M7  vout1 vout1 vout1 vout1 mgate=4 W=10u L=0.11u lneck=0.4u LD2=0.58u KC=0.01603 KRo=62.4 KR=56.21622 KL=0.2519 KCGB=0.02 nddg=0 nsdg=2 Mmulti=1
Short:DC_Block1  _net8956 rfin Mode=1

c4=0.53 tune{ 0.1 to 1.5 by 0.1 } opt{ 0.1 to 2 }
R=2550 notune{ 2000 to 4000 by 0.1 } opt{ 1000 to 4000 }
L3=0.60551 notune{ 0.1 to 1.5 by 0.1 } opt{ 0.1 to 1 }
c3=0.6 tune{ 0.1 to 3 by 0.1 } opt{ 0.1 to 2 }
Port:Term1  Vload 0 Num=2 Z=50 Noise=yes
cmimrf_070608_mim_orig:X43  _net8956 _net8949 0 _M=0.8 c=0.8 p C1=0 C1multi=1 aratio=1.0 cmimx=1.0
cmimrf_070608_mim_orig:X45  _net8949 _net8615 0 _M=1 c=0.6 p C1=0 C1multi=1 aratio=1.0 cmimx=1.0
cmimrf_070608_mim_orig:X44  _net8956 _net8949 0 _M=0.8 c=0.8 p C1=0 C1multi=1 aratio=1.0 cmimx=1.0
#uselib "ckt" , "S2P"
S2P:SNP7  _net8949 0 0 File="C:\users\default\cmospahi11\.\data\Inductor_066nh_mom_a.s2p" Type="touchstone" InterpMode="linear" InterpDom="" ExtrapMode="constant" Temp=27.0 CheckPassivity=0
R:R8  _net8747 _net9020 R=2550 Ohm Noise=yes

L1=0.777977 notune{ 0.5 to 2 by 0.1 } opt{ 0.4 to 1.6 }
L2=1 notune{ 0.5 to 2 by 0.1 } opt{ 0.4 to 1.6 }
c1=1 notune{ 0.1 to 5 by 0.1 } opt{ 1 to 5 }
V_Source:SRC13  _net8734 0 Vdc=2 V notune{ 0.185 V to 0.555 V by 0.005 V } SaveCurrent=1
Short:Is_low  Vs_low _net8687 Mode=0 SaveCurrent=yes
V_Source:SRC2  Vs_low 0 Vdc=0.345 notune{ 0.17 to 0.51 by 0.01 } SaveCurrent=1
cmimrf_070608_mim_orig:X32  _net9041 _net8684 0 _M=1 c=1 p C1=0 C1multi=1 aratio=1.0 cmimx=1.0
cmimrf_070608_mim_orig:X39  _net9041 _net8684 0 _M=1 c=1 p C1=0 C1multi=1 aratio=1.0 cmimx=1.0
cmimrf_070608_mim_orig:X40  _net9041 _net8684 0 _M=1 c=1 p C1=0 C1multi=1 aratio=1.0 cmimx=1.0
Short:I_input  in _net8615 Mode=0 SaveCurrent=yes
C:C8  0 vdd C=5 pF
R:R7  _net8623 _net9016 R=500 Ohm Noise=yes
Short:iout1  vout1 _net8972 Mode=0 SaveCurrent=yes
Short:Iload  _net8684 Vload Mode=0 SaveCurrent=yes
V_Source:SRC12  _net8747 0 Vdc=2 V notune{ 0.185 V to 0.555 V by 0.005 V } SaveCurrent=1
cmimrf_070608_mim_orig:X23  _net9016 0 0 _M=1 c=1p C1=0 C1multi=1 aratio=1.0 cmimx=1.0
cmimrf_070608_mim_orig:X24  _net9014 0 0 _M=1 c=1p C1=0 C1multi=1 aratio=1.0 cmimx=1.0
cmimrf_070608_mim_orig:X33  _net9020 0 0 _M=1 c=1 p C1=0 C1multi=1 aratio=1.0 cmimx=1.0
rpolyrf_070608:X34  _net8734 _net9014 0 _M=1 Ns=1 Np=1 wr=1 r=530 tc1=0 tc2=0 R1=0 R1multi=0 rpolyx=1
rpolyrf_070608:X35  _net9014 0 0 _M=1 Ns=1 Np=1 wr=1 r=900 tc1=0 tc2=0 R1=0 R1multi=0 rpolyx=1
R:R10  _net9016 0 R=2625 Ohm Noise=yes
V_Source:SRC11  _net8623 0 Vdc=2 V notune{ 0.75 V to 2.25 V by 0.02 V } SaveCurrent=1
Short:Is_high  Vs_high vdd Mode=0 SaveCurrent=yes
#uselib "ckt" , "S2P"
S2P:SNP1  _net8684 0 0 File="C:\users\default\cmospahi11\.\data\inductor110_mom_a.s2p" Type="touchstone" InterpMode="linear" InterpDom="" ExtrapMode="constant" Temp=27.0 CheckPassivity=0
#uselib "ckt" , "S2P"
S2P:SNP6  vdd _net9041 0 File="C:\users\default\cmospahi11\.\data\inductor76_mom_a.s2p" Type="touchstone" InterpMode="linear" InterpDom="" ExtrapMode="constant" Temp=27.0 CheckPassivity=0
V_Source:G3  Vs_high 0 Vdc=2 SaveCurrent=1

Andrew Beckett wrote on Jan 8^th, 2010, 3:19am:

It seems that you are also not familiar with Cadence Spectre.

Extractions from your Spectre's Netlist Quote:

If you use Shooting-PSS/PAC of Cadence Spectre, try to use following settings.
Quote:


If you use HB-PSS/PAC of Cadence Spectre, try to use following settings.
Quote:


In your settings for HB2(two-large-tones-HB) of Agilent ADS, your "Max_IMD_order" is too small.
Increase "Max_IMD_order" to 5 at least.
And try to increase "FundOversample" until results will not change.

Try to use following settings for HB2(two-large-tones-HB) of Agilent ADS.
Quote:

Dear pancho_hideboo:
        thank you very much for your advice. I did my simulation again. the Max_IMD_order=7  FundOversample=4 . the themulation resulat seems a 2 db difference .
   and i also resimulate it in spectre. the netlist is as follows:
"simulatorOptions options reltol=1e-3 vabstol=1e-6 iabstol=1e-12 temp=27 \
   tnom=27 scalem=1.0 scale=1.0 gmin=1e-12 rforce=1 maxnotes=5 maxwarns=5 \
   digits=5 cols=80 pivrel=1e-3 sensfile="../psf/sens.output" \
   checklimitdest=psf
sweeppss  sweep  param=prf  start=-30  stop=3  step=1  {
 pss  pss  flexbalance=yes  oversamplefactor=4  fund=5.8G  harms=10
+      errpreset=moderate  annotate=status

 pac  pac  start=5.802G  maxsideband=10  annotate=status
}"
the simulation seems same as before. there is also a 10db difference.
I know the mistake made before is the Max_IMD_order and FundOversample is too low in hb simulation. i changed these parameters. but no obvious improve.
again thank you  very much!

If you show me the followings, I can resimulate using both ADS and Spectre with correct settings.
Quote:


(1) HB1SS in Agilent ADS
(2) HB2 in Agilent ADS

(3) SSNA(=HB1SS) in Agilent GoldenGate
(4) CR(=HB2) in Agilent GoldenGate

(5) Shooting-PSS/PAC in Cadence Spectre
(6) HB-PSS/PAC in Cadence Spectre
(7) HB2-QPSS in Cadence Spectre

Your simulations are (2), (5) and (6).
And your IM3 definition in (2) is improper, if you compare IM3 with (1), (3), (5) and (6).

waseda-rfic wrote on Jan 10^th, 2010, 10:18pm:
No.
You are still misunderstanding.

Your IM3 is defined for "fix input power" like following,
So your setting affect on IM3.
waseda-rfic wrote on Jan 6^th, 2010, 5:47pm:
waseda-rfic wrote on Jan 6^th, 2010, 5:47pm:
It seems that you are also wrong in post processing of ADS's HB2 results.
LSSP is never needed.

Many RF beginners often have same misunderstandings as yours.

Anyway set dbmtow(RFpower) not dbmtow(RFpower-3) as Power in HB2 of Agilent ADS.

Also try to run HB2-QPSS in Cadence Spectre.
And compare results between Shooting-PSS/PAC, HB-PSS/PAC in Cadence Spectre and HB2-QPSS in Cadence Spectre.

If you compare ADS's HB2 with HB2-QPSS of Cadence Spectre, set Max_IMD_order=7 in ADS's HB2.
See http://www.designers-guide.org/Forum/YaBB.pl?num=1205223090

waseda-rfic wrote on Jan 10^th, 2010, 10:18pm:
HB1SS exists in any Version of ADS.
And it has existed since 1988, a start day of Agilent MDS which is an ancestor of ADS.
See "Setting Up Small-Signal Simulations" of http://edocs.soco.agilent.com/display/ads2009/Harmonic+Balance+Basics

See parameter of "P_USB" in http://edocs.soco.agilent.com/display/ads2009/P+1Tone+%28Power+Source%2C+Single+...

Also see the followings.
http://edocs.soco.agilent.com/display/ads2009/Large+Signal+Amplifier+Simulations...
http://edocs.soco.agilent.com/display/ads2009/Simulation+of+a+Differential-Mode+...

Again see netlist for HB1SS in http://www.designers-guide.org/Forum/YaBB.pl?num=1262828862/20#20.
If you modify your netlist for HB1SS manually, you can run HB1SS analysis from Windows command line.

% hpeesofsim [-r output_rawfile_name] [netlist_inputfile_name]

See "Running a Simulation from the Command Line" of the following.
http://edocs.soco.agilent.com/display/ads2009/ADS+Simulator+Input+Syntax

HB1SS doesn't consume computer resources such as memory compared to HB2.
So HB1SS was effective method in the ancient day if you don't require IM5, IM7, etc.

The reason why One-Large-Tone with One Small Signal Analysis(=PSS/PAC) is major in Cadence Spectre is
due to very bad performance of Two-Large-Tone Analysis of Cadence Spectre(Shooting-Pdisto analysis which is called as Shooting-QPSS currently).

Actually Cadence SpectreRF was released with only Shooting-PSS/PAC/PXF/PNoise for driven circuits first in 1995.
So we couldn't run Two-Large-Tone Analysis where two tones have no common divisor frequency or common divisor frequency is too small in Cadence Spectre.

About PSS and QPSS, see http://www.designers-guide.org/Forum/YaBB.pl?num=1234783833/2#2

waseda-rfic wrote on Jan 6^th, 2010, 5:47pm:
For ACPR evaluation, you have to consider not only IM3 but also IM5, IM7 and IM9, etc.
Again see http://www.designers-guide.org/Forum/YaBB.pl?num=1190971685/7#7

And if noise effects are not included, spectrum floor is too low.
So you have to include noise effects in simulation.

Generally you need to run Envelope Analysis for evaluation of ACPR of transistor level circuits.

Envelope Analysis of Agilent RFDE(ADSsim) and GoldenGate can include noise effect.
But Envelope Analysis of Cadence Spectre can not do.

See http://www.designers-guide.org/Forum/YaBB.pl?num=1260978648/1#1

But there is a difference in noise of Envelope Analysis between Agilent RFDE(ADSsim) and GoldenGate.
http://www.designers-guide.org/Forum/YaBB.pl?num=1232220194/5#5

Since noise in Envelope Analysis of Agilent RFDE(ADSsim) is monte carlo type, so results are largely affected by time step used for analysis.
On the other hand, noise in Envelope Analysis of Agilent GoldenGate is small signal type, so I recommend you to use Envelope Analysis of Agilent GoldenGate for evaluation of ACPR.

Of course, even in Envelope Analysis of Agilent GoldenGate, system noise bandwidth is 1/Tstep.
This is same as noise bandwidth in Agilent Ptolemy, although noise in Agilent Ptolemy is monte calro type.

Problems of Agilent GoldenGate are :
   - Concept of Simulator Use Model is fairly different
     compared to Agilent RFDE(ADSsim) and Cadence Spectre.
   - Versatilities as Simulator are poor compared to Agilent RFDE(ADSsim).
   - There are still many many bugs especially regarding user interface in ADE.
   - Standard Verilog-A Compiler(va2gg) is very buggy.
        Note :  We can choose two compilers,  Verilog-A (va2gg) or Verilog-AMS (tiburon) in GoldenGate.