[SI-LIST] Re: THD simulation result in TINA and orcad has huge deviation
- From: 李晖 <lihuizju@xxxxxxxxx>
- To: "Havermann, Gert" <Gert.Havermann@xxxxxxxxxxx>
- Date: Mon, 24 Mar 2014 22:02:49 +0800
Hi All,
Sorry about the wrong character coding makes confued.
Below is my original email of my question.
I changed the setting "Maximum step size" in OrCAD to small step, and
got a better result. Now the result from OrCAD is about 2.7E-6 PERCENT,
which is 1/10 of OUTPUT from TINA. I'm newbee to these two simulation
tools, and trying to use them right. Thanks for all your help.
A simple CLC circuit has been simulated with TINA and OrCAD. Hope to
get the THD simulaiton result from these two pspice based tools. Base
frequence is set to 1kHz, and Number of harmonics is 20. Both tools have
the same settings. The TINA shows the THD is about 2.27E-005% , but the
result from OrCAD is about 1.02E00 PERCENT. There is a huge gap between
these two results. Which one is more credible?
The circuit and the test result have been attached, please give your
comment kindly.
Best Regards.
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
**** 03/24/14 20:27:40 ***** PSpice 16.6.0 (October 2012) ***** ID# 0
********
** Profile: "SCHEMATIC1-thd" [
D:\WORKSPACE\CADENCE\PSPICE\filter\filter-PSpiceFiles\SCHEMATIC1\thd.sim ]
**** CIRCUIT DESCRIPTION
******************************************************************************
** Creating circuit file "thd.cir"
** WARNING: THIS AUTOMATICALLY GENERATED FILE MAY BE OVERWRITTEN BY
SUBSEQUENT SIMULATIONS
*Libraries:
* Profile Libraries :
* Local Libraries :
* From [PSPICE NETLIST] section of
D:\Workspace\Cadence\cdssetup\OrCAD_PSpice/16.6.0/PSpice.ini file:
.lib "nom.lib"
*Analysis directives:
.TRAN 0 3m 0
.FOUR 1000 20 V([VOUTR])
.OPTIONS ADVCONV
.PROBE64 V(alias(*)) I(alias(*)) W(alias(*)) D(alias(*)) NOISE(alias(*))
.INC "..\SCHEMATIC1.net"
**** INCLUDING SCHEMATIC1.net ****
* source FILTER
R_R1 0 VOUTR 32 TC=0,0
V_V1 N00122 0
+SIN 0 0.4 1k 0 0 0
L_L1 N00122 VOUTR 2.9nF
C_C1 0 N00122 125p TC=0,0
C_C2 0 VOUTR 125p TC=0,0
**** RESUMING thd.cir ****
.END
**** 03/24/14 20:27:40 ***** PSpice 16.6.0 (October 2012) ***** ID# 0
********
** Profile: "SCHEMATIC1-thd" [
D:\WORKSPACE\CADENCE\PSPICE\filter\filter-PSpiceFiles\SCHEMATIC1\thd.sim ]
**** INITIAL TRANSIENT SOLUTION TEMPERATURE = 27.000 DEG C
******************************************************************************
NODE VOLTAGE NODE VOLTAGE NODE VOLTAGE NODE VOLTAGE
(VOUTR) 0.0000 (N00122) 0.0000
VOLTAGE SOURCE CURRENTS
NAME CURRENT
V_V1 0.000E+00
TOTAL POWER DISSIPATION 0.00E+00 WATTS
**** 03/24/14 20:27:40 ***** PSpice 16.6.0 (October 2012) ***** ID# 0
********
** Profile: "SCHEMATIC1-thd" [
D:\WORKSPACE\CADENCE\PSPICE\filter\filter-PSpiceFiles\SCHEMATIC1\thd.sim ]
**** FOURIER ANALYSIS TEMPERATURE = 27.000 DEG C
******************************************************************************
FOURIER COMPONENTS OF TRANSIENT RESPONSE V(VOUTR)
DC COMPONENT = 6.4049E-04
HARMONIC FREQUENCY FOURIER NORMALIZED PHASE NORMALIZED
NO (HZ) COMPONENT COMPONENT (DEG) PHASE (DEG)
1 1.0000E+03 3.9542E-01 1.0000E+00 1.7302E-01 0.0000E+00
2 2.0000E+03 1.1555E-03 2.9223E-03 7.8958E+01 7.8612E+01
3 3.0000E+03 1.1804E-03 2.9851E-03 7.2686E+01 7.2167E+01
4 4.0000E+03 1.1419E-03 2.8878E-03 6.6331E+01 6.5639E+01
5 5.0000E+03 1.0987E-03 2.7786E-03 6.0938E+01 6.0073E+01
6 6.0000E+03 1.0556E-03 2.6697E-03 5.5451E+01 5.4413E+01
7 7.0000E+03 1.0021E-03 2.5344E-03 4.9988E+01 4.8776E+01
8 8.0000E+03 9.4348E-04 2.3860E-03 4.4856E+01 4.3472E+01
9 9.0000E+03 8.8158E-04 2.2295E-03 3.9884E+01 3.8327E+01
10 1.0000E+04 8.1685E-04 2.0658E-03 3.5206E+01 3.3475E+01
11 1.1000E+04 7.5478E-04 1.9088E-03 3.0638E+01 2.8735E+01
12 1.2000E+04 6.9190E-04 1.7498E-03 2.5757E+01 2.3681E+01
13 1.3000E+04 6.3634E-04 1.6093E-03 2.0991E+01 1.8742E+01
14 1.4000E+04 6.3327E-04 1.6015E-03 1.3209E+01 1.0787E+01
15 1.5000E+04 8.4772E-04 2.1439E-03 -1.1082E+01 -1.3678E+01
16 1.6000E+04 1.4262E-03 3.6067E-03 1.2536E+02 1.2259E+02
17 1.7000E+04 8.2329E-04 2.0821E-03 1.0896E+02 1.0602E+02
18 1.8000E+04 1.0441E-03 2.6405E-03 -2.0470E+01 -2.3584E+01
19 1.9000E+04 3.2247E-04 8.1551E-04 1.6041E+01 1.2754E+01
20 2.0000E+04 3.1407E-04 7.9428E-04 3.4505E+01 3.1045E+01
TOTAL HARMONIC DISTORTION = 1.0201E+00 PERCENT
JOB CONCLUDED
**** 03/24/14 20:27:40 ***** PSpice 16.6.0 (October 2012) ***** ID# 0
********
** Profile: "SCHEMATIC1-thd" [
D:\WORKSPACE\CADENCE\PSPICE\filter\filter-PSpiceFiles\SCHEMATIC1\thd.sim ]
**** JOB STATISTICS SUMMARY
******************************************************************************
Total job time (using Solver 1) = .02
2014-03-24 21:42 GMT+08:00 Havermann, Gert <Gert.Havermann@xxxxxxxxxxx>:
> I don't know what your question is, as I only get Letter-Soup, but taking
> the header information I think your problem is simply the lack of deep
> insight knowledge into the tools you use.
> If simulation results don't match up then this can mean three things:
> 1) both are wrong
> 2) the first is right
> 3) the 2nd is right
> (taking into account that "right" is a definition already)
> Now you have to find out which of the tree cases is right, and then check
> the other tool (or both) for wrong simulation settings. And with wrong I
> don't only refer to typing errors. These tools all work with definitions
> and restrictions, and as long as you don't know them, you will have a hard
> time to get results right.
>
> The best thing is always to verify the tools results. take something
> that's available and maybe already tested properly and try to match the
> results in simulation.
>
> BR
> Gert
>
> -----Ursprüngliche Nachricht-----
> Von: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
> Im Auftrag von LiHui
> Gesendet: Montag, 24. März 2014 13:55
> An: si-list@xxxxxxxxxxxxx
> Betreff: [SI-LIST] THD simulation result in TINA and orcad has huge
> deviation
>
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