Mail Archives: geda-help/2014/10/06/00:45:50
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| Sun, 05 Oct 2014 21:45:02 -0700 (PDT)
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| From: | Jayer Fernandes <jayerfernandes AT gmail DOT com>
|
| Date: | Sun, 5 Oct 2014 23:44:42 -0500
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| Message-ID: | <CAGx63B1Ui-PRwUVYkh7GR3pcOsP6AW8c8YVVH5t7-i9TswM1LA@mail.gmail.com>
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| Subject: | [geda-help] LM741 OpAmp
|
| To: | geda-help AT delorie DOT com
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| Reply-To: | geda-help AT delorie DOT com
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--001a11c332b6f7454d0504b9bece
Content-Type: multipart/alternative; boundary=001a11c332b6f745490504b9becc
--001a11c332b6f745490504b9becc
Content-Type: text/plain; charset=UTF-8
Hi,
I'm new to gEDA and ngspice. I'm trying my best to learn it using whatever
I can find online.
I was trying to simulate a simple opAmp inverting circuit by using the
LM741 opamp. I keep ending up with an unknown in my final which I've been
trying to figure out for the last few days.
I really would appreciate any help that I can find. I did see some old
posts here and I tried out the suggestions, however I just can't figure out
where I'm going wrong.
I've attached my netlist as follows along with mmy schematic
* gnetlist -g spice-sdb -o inverting.net inverting.sch
*********************************************************
* Spice file generated by gnetlist *
* spice-sdb version 4.28.2007 by SDB -- *
* provides advanced spice netlisting capability. *
* Documentation at http://www.brorson.com/gEDA/SPICE/ *
*********************************************************
*vvvvvvvv Included SPICE model from
/home/jayerfernandes/Desktop/NgSpice/models/LM741.mod vvvvvvvv
*//////////////////////////////////////////////////////////////////////
* (C) National Semiconductor, Inc.
* Models developed and under copyright by:
* National Semiconductor, Inc.
*/////////////////////////////////////////////////////////////////////
* Legal Notice: This material is intended for free software support.
* The file may be copied, and distributed; however, reselling the
* material is illegal
*////////////////////////////////////////////////////////////////////
* For ordering or technical information on these models, contact:
* National Semiconductor's Customer Response Center
* 7:00 A.M.--7:00 P.M. U.S. Central Time
* (800) 272-9959
* For Applications support, contact the Internet address:
* amps-apps AT galaxy DOT nsc DOT com
*//////////////////////////////////////////////////////////
*LM741 OPERATIONAL AMPLIFIER MACRO-MODEL
*//////////////////////////////////////////////////////////
*
* connections: non-inverting input
* | inverting input
* | | positive power supply
* | | | negative power supply
* | | | | output
* | | | | |
* | | | | |
.SUBCKT LM741 1 2 99 50 28
*
*Features:
*Improved performance over industry standards
*Plug-in replacement for LM709,LM201,MC1439,748
*Input and output overload protection
*
****************INPUT STAGE**************
*
IOS 2 1 20N
*^Input offset current
R1 1 3 250K
R2 3 2 250K
I1 4 50 100U
R3 5 99 517
R4 6 99 517
Q1 5 2 4 QX
Q2 6 7 4 QX
*Fp2=2.55 MHz
C4 5 6 60.3614P
*
***********COMMON MODE EFFECT***********
*
I2 99 50 1.6MA
*^Quiescent supply current
EOS 7 1 POLY(1) 16 49 1E-3 1
*Input offset voltage.^
R8 99 49 40K
R9 49 50 40K
*
*********OUTPUT VOLTAGE LIMITING********
V2 99 8 1.63
D1 9 8 DX
D2 10 9 DX
V3 10 50 1.63
*
**************SECOND STAGE**************
*
EH 99 98 99 49 1
G1 98 9 5 6 2.1E-3
*Fp1=5 Hz
R5 98 9 95.493MEG
C3 98 9 333.33P
*
***************POLE STAGE***************
*
*Fp=30 MHz
G3 98 15 9 49 1E-6
R12 98 15 1MEG
C5 98 15 5.3052E-15
*
*********COMMON-MODE ZERO STAGE*********
*
*Fpcm=300 Hz
G4 98 16 3 49 3.1623E-8
L2 98 17 530.5M
R13 17 16 1K
*
**************OUTPUT STAGE**************
*
F6 50 99 POLY(1) V6 450U 1
E1 99 23 99 15 1
R16 24 23 25
D5 26 24 DX
V6 26 22 0.65V
R17 23 25 25
D6 25 27 DX
V7 22 27 0.65V
V5 22 21 0.18V
D4 21 15 DX
V4 20 22 0.18V
D3 15 20 DX
L3 22 28 100P
RL3 22 28 100K
*
***************MODELS USED**************
*
.MODEL DX D(IS=1E-15)
.MODEL QX NPN(BF=625)
*
.ENDS
*^^^^^^^^ End of included SPICE model from
/home/jayerfernandes/Desktop/NgSpice/models/LM741.mod ^^^^^^^^
*
*============== Begin SPICE netlist of main design ============
X1 0 3 Vcc Vee Output unknown
V3 0 in AC SIN(0 1m 50)
R3 0 1 250
R2 3 Output 47k
R1 2 3 1k
C3 3 Output 3300p
C2 in 2 180u
C1 Output 1 75u
V2 Vcc 0 15V
V1 Vee 0 -15V
.end
*Jayer Fernandes*
* +1 608 358 3799 <%2B1%20608%20358%203799>*
--001a11c332b6f745490504b9becc
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:tahoma,s=
ans-serif">Hi,<br><br></div><div class=3D"gmail_default" style=3D"font-fami=
ly:tahoma,sans-serif">I'm new to gEDA and ngspice. I'm trying my be=
st to learn it using whatever I can find online.<br></div><div class=3D"gma=
il_default" style=3D"font-family:tahoma,sans-serif">I was trying to simulat=
e a simple opAmp inverting circuit by using the LM741 opamp. I keep ending =
up with an unknown in my final which I've been trying to figure out for=
the last few days.<br></div><div class=3D"gmail_default" style=3D"font-fam=
ily:tahoma,sans-serif">I really would appreciate any help that I can find. =
I did see some old posts here and I tried out the suggestions, however I ju=
st can't figure out where I'm going wrong. <br><br>I've attache=
d my netlist as follows along with mmy schematic</div><div class=3D"gmail_d=
efault" style><div class=3D"gmail_default" style><font face=3D"tahoma, sans=
-serif">* gnetlist -g spice-sdb -o <a href=3D"http://inverting.net">inverti=
ng.net</a> inverting.sch</font></div><div class=3D"gmail_default" style><fo=
nt face=3D"tahoma, sans-serif">********************************************=
*************</font></div><div class=3D"gmail_default" style><font face=3D"=
tahoma, sans-serif">* Spice file generated by gnetlist =C2=A0 =C2=A0 =C2=A0=
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0*</font></div><div =
class=3D"gmail_default" style><font face=3D"tahoma, sans-serif">* spice-sdb=
version 4.28.2007 by SDB -- =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 *</font></div><div class=3D"gmail_default" style><font face=3D"t=
ahoma, sans-serif">* provides advanced spice netlisting capability. =C2=A0 =
=C2=A0 =C2=A0 =C2=A0*</font></div><div class=3D"gmail_default" style><font =
face=3D"tahoma, sans-serif">* Documentation at <a href=3D"http://www.brorso=
n.com/gEDA/SPICE/">http://www.brorson.com/gEDA/SPICE/</a> =C2=A0 *</font></=
div><div class=3D"gmail_default" style><font face=3D"tahoma, sans-serif">**=
*******************************************************</font></div><div cl=
ass=3D"gmail_default" style><font face=3D"tahoma, sans-serif">*vvvvvvvv =C2=
=A0Included SPICE model from /home/jayerfernandes/Desktop/NgSpice/models/LM=
741.mod vvvvvvvv</font></div><div class=3D"gmail_default" style><font face=
=3D"tahoma, sans-serif">*//////////////////////////////////////////////////=
////////////////////</font></div><div class=3D"gmail_default" style><font f=
ace=3D"tahoma, sans-serif">* (C) National Semiconductor, Inc.</font></div><=
div class=3D"gmail_default" style><font face=3D"tahoma, sans-serif">* Model=
s developed and under copyright by:</font></div><div class=3D"gmail_default=
" style><font face=3D"tahoma, sans-serif">* National Semiconductor, Inc. =
=C2=A0</font></div><div class=3D"gmail_default" style><font face=3D"tahoma,=
sans-serif"><br></font></div><div class=3D"gmail_default" style><font face=
=3D"tahoma, sans-serif">*//////////////////////////////////////////////////=
///////////////////</font></div><div class=3D"gmail_default" style><font fa=
ce=3D"tahoma, sans-serif">* Legal Notice: This material is intended for fre=
e software support.</font></div><div class=3D"gmail_default" style><font fa=
ce=3D"tahoma, sans-serif">* The file may be copied, and distributed; howeve=
r, reselling the=C2=A0</font></div><div class=3D"gmail_default" style><font=
face=3D"tahoma, sans-serif">* =C2=A0material is illegal</font></div><div c=
lass=3D"gmail_default" style><font face=3D"tahoma, sans-serif"><br></font><=
/div><div class=3D"gmail_default" style><font face=3D"tahoma, sans-serif">*=
////////////////////////////////////////////////////////////////////</font>=
</div><div class=3D"gmail_default" style><font face=3D"tahoma, sans-serif">=
* For ordering or technical information on these models, contact:</font></d=
iv><div class=3D"gmail_default" style><font face=3D"tahoma, sans-serif">* N=
ational Semiconductor's Customer Response Center</font></div><div class=
=3D"gmail_default" style><font face=3D"tahoma, sans-serif">* =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 7:00 A.M.--7:00 P.M.=C2=A0 U.S. C=
entral Time</font></div><div class=3D"gmail_default" style><font face=3D"ta=
homa, sans-serif">* =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0=
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0(800) 272-9959</fon=
t></div><div class=3D"gmail_default" style><font face=3D"tahoma, sans-serif=
">* For Applications support, contact the Internet address:</font></div><di=
v class=3D"gmail_default" style><font face=3D"tahoma, sans-serif">* =C2=A0<=
a href=3D"mailto:amps-apps AT galaxy DOT nsc DOT com">amps-apps AT galaxy DOT nsc DOT com</a></fo=
nt></div><div class=3D"gmail_default" style><font face=3D"tahoma, sans-seri=
f"><br></font></div><div class=3D"gmail_default" style><font face=3D"tahoma=
, sans-serif">*//////////////////////////////////////////////////////////</=
font></div><div class=3D"gmail_default" style><font face=3D"tahoma, sans-se=
rif">*LM741 OPERATIONAL AMPLIFIER MACRO-MODEL</font></div><div class=3D"gma=
il_default" style><font face=3D"tahoma, sans-serif">*//////////////////////=
////////////////////////////////////</font></div><div class=3D"gmail_defaul=
t" style><font face=3D"tahoma, sans-serif">*</font></div><div class=3D"gmai=
l_default" style><font face=3D"tahoma, sans-serif">* connections: =C2=A0 =
=C2=A0 =C2=A0non-inverting input</font></div><div class=3D"gmail_default" s=
tyle><font face=3D"tahoma, sans-serif">* =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0=
=C2=A0 =C2=A0 =C2=A0 =C2=A0 | =C2=A0 inverting input</font></div><div clas=
s=3D"gmail_default" style><font face=3D"tahoma, sans-serif">* =C2=A0 =C2=A0=
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 | =C2=A0 | =C2=A0 positiv=
e power supply</font></div><div class=3D"gmail_default" style><font face=3D=
"tahoma, sans-serif">* =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 | =C2=A0 | =C2=A0 | =C2=A0 negative power supply</font></div><di=
v class=3D"gmail_default" style><font face=3D"tahoma, sans-serif">* =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 | =C2=A0 | =C2=A0 |=
=C2=A0 | =C2=A0 output</font></div><div class=3D"gmail_default" style><fon=
t face=3D"tahoma, sans-serif">* =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 | =C2=A0 | =C2=A0 | =C2=A0 | =C2=A0 |</font></div><div=
class=3D"gmail_default" style><font face=3D"tahoma, sans-serif">* =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 | =C2=A0 | =C2=A0 |=
=C2=A0 | =C2=A0 |</font></div><div class=3D"gmail_default" style><font fac=
e=3D"tahoma, sans-serif">.SUBCKT LM741 =C2=A0 =C2=A0 =C2=A0 1 =C2=A0 2 =C2=
=A099 =C2=A050 =C2=A028</font></div><div class=3D"gmail_default" style><fon=
t face=3D"tahoma, sans-serif">*</font></div><div class=3D"gmail_default" st=
yle><font face=3D"tahoma, sans-serif">*Features:</font></div><div class=3D"=
gmail_default" style><font face=3D"tahoma, sans-serif">*Improved performanc=
e over industry standards</font></div><div class=3D"gmail_default" style><f=
ont face=3D"tahoma, sans-serif">*Plug-in replacement for LM709,LM201,MC1439=
,748</font></div><div class=3D"gmail_default" style><font face=3D"tahoma, s=
ans-serif">*Input and output overload protection</font></div><div class=3D"=
gmail_default" style><font face=3D"tahoma, sans-serif">*</font></div><div c=
lass=3D"gmail_default" style><font face=3D"tahoma, sans-serif">************=
****INPUT STAGE**************</font></div><div class=3D"gmail_default" styl=
e><font face=3D"tahoma, sans-serif">*</font></div><div class=3D"gmail_defau=
lt" style><font face=3D"tahoma, sans-serif">IOS 2 1 20N</font></div><div cl=
ass=3D"gmail_default" style><font face=3D"tahoma, sans-serif">*^Input offse=
t current</font></div><div class=3D"gmail_default" style><font face=3D"taho=
ma, sans-serif">R1 1 3 250K</font></div><div class=3D"gmail_default" style>=
<font face=3D"tahoma, sans-serif">R2 3 2 250K</font></div><div class=3D"gma=
il_default" style><font face=3D"tahoma, sans-serif">I1 4 50 100U</font></di=
v><div class=3D"gmail_default" style><font face=3D"tahoma, sans-serif">R3 5=
99 517</font></div><div class=3D"gmail_default" style><font face=3D"tahoma=
, sans-serif">R4 6 99 517</font></div><div class=3D"gmail_default" style><f=
ont face=3D"tahoma, sans-serif">Q1 5 2 4 QX</font></div><div class=3D"gmail=
_default" style><font face=3D"tahoma, sans-serif">Q2 6 7 4 QX</font></div><=
div class=3D"gmail_default" style><font face=3D"tahoma, sans-serif">*Fp2=3D=
2.55 MHz</font></div><div class=3D"gmail_default" style><font face=3D"tahom=
a, sans-serif">C4 5 6 60.3614P</font></div><div class=3D"gmail_default" sty=
le><font face=3D"tahoma, sans-serif">*</font></div><div class=3D"gmail_defa=
ult" style><font face=3D"tahoma, sans-serif">***********COMMON MODE EFFECT*=
**********</font></div><div class=3D"gmail_default" style><font face=3D"tah=
oma, sans-serif">*</font></div><div class=3D"gmail_default" style><font fac=
e=3D"tahoma, sans-serif">I2 99 50 1.6MA</font></div><div class=3D"gmail_def=
ault" style><font face=3D"tahoma, sans-serif">*^Quiescent supply current</f=
ont></div><div class=3D"gmail_default" style><font face=3D"tahoma, sans-ser=
if">EOS 7 1 POLY(1) 16 49 1E-3 1</font></div><div class=3D"gmail_default" s=
tyle><font face=3D"tahoma, sans-serif">*Input offset voltage.^</font></div>=
<div class=3D"gmail_default" style><font face=3D"tahoma, sans-serif">R8 99 =
49 40K</font></div><div class=3D"gmail_default" style><font face=3D"tahoma,=
sans-serif">R9 49 50 40K</font></div><div class=3D"gmail_default" style><f=
ont face=3D"tahoma, sans-serif">*</font></div><div class=3D"gmail_default" =
style><font face=3D"tahoma, sans-serif">*********OUTPUT VOLTAGE LIMITING***=
*****</font></div><div class=3D"gmail_default" style><font face=3D"tahoma, =
sans-serif">V2 99 8 1.63</font></div><div class=3D"gmail_default" style><fo=
nt face=3D"tahoma, sans-serif">D1 9 8 DX</font></div><div class=3D"gmail_de=
fault" style><font face=3D"tahoma, sans-serif">D2 10 9 DX</font></div><div =
class=3D"gmail_default" style><font face=3D"tahoma, sans-serif">V3 10 50 1.=
63</font></div><div class=3D"gmail_default" style><font face=3D"tahoma, san=
s-serif">*</font></div><div class=3D"gmail_default" style><font face=3D"tah=
oma, sans-serif">**************SECOND STAGE**************</font></div><div =
class=3D"gmail_default" style><font face=3D"tahoma, sans-serif">*</font></d=
iv><div class=3D"gmail_default" style><font face=3D"tahoma, sans-serif">EH =
99 98 99 49 1</font></div><div class=3D"gmail_default" style><font face=3D"=
tahoma, sans-serif">G1 98 9 5 6 2.1E-3</font></div><div class=3D"gmail_defa=
ult" style><font face=3D"tahoma, sans-serif">*Fp1=3D5 Hz</font></div><div c=
lass=3D"gmail_default" style><font face=3D"tahoma, sans-serif">R5 98 9 95.4=
93MEG</font></div><div class=3D"gmail_default" style><font face=3D"tahoma, =
sans-serif">C3 98 9 333.33P</font></div><div class=3D"gmail_default" style>=
<font face=3D"tahoma, sans-serif">*</font></div><div class=3D"gmail_default=
" style><font face=3D"tahoma, sans-serif">***************POLE STAGE********=
*******</font></div><div class=3D"gmail_default" style><font face=3D"tahoma=
, sans-serif">*</font></div><div class=3D"gmail_default" style><font face=
=3D"tahoma, sans-serif">*Fp=3D30 MHz</font></div><div class=3D"gmail_defaul=
t" style><font face=3D"tahoma, sans-serif">G3 98 15 9 49 1E-6</font></div><=
div class=3D"gmail_default" style><font face=3D"tahoma, sans-serif">R12 98 =
15 1MEG</font></div><div class=3D"gmail_default" style><font face=3D"tahoma=
, sans-serif">C5 98 15 5.3052E-15</font></div><div class=3D"gmail_default" =
style><font face=3D"tahoma, sans-serif">*</font></div><div class=3D"gmail_d=
efault" style><font face=3D"tahoma, sans-serif">*********COMMON-MODE ZERO S=
TAGE*********</font></div><div class=3D"gmail_default" style><font face=3D"=
tahoma, sans-serif">*</font></div><div class=3D"gmail_default" style><font =
face=3D"tahoma, sans-serif">*Fpcm=3D300 Hz</font></div><div class=3D"gmail_=
default" style><font face=3D"tahoma, sans-serif">G4 98 16 3 49 3.1623E-8</f=
ont></div><div class=3D"gmail_default" style><font face=3D"tahoma, sans-ser=
if">L2 98 17 530.5M</font></div><div class=3D"gmail_default" style><font fa=
ce=3D"tahoma, sans-serif">R13 17 16 1K</font></div><div class=3D"gmail_defa=
ult" style><font face=3D"tahoma, sans-serif">*</font></div><div class=3D"gm=
ail_default" style><font face=3D"tahoma, sans-serif">**************OUTPUT S=
TAGE**************</font></div><div class=3D"gmail_default" style><font fac=
e=3D"tahoma, sans-serif">*</font></div><div class=3D"gmail_default" style><=
font face=3D"tahoma, sans-serif">F6 50 99 POLY(1) V6 450U 1</font></div><di=
v class=3D"gmail_default" style><font face=3D"tahoma, sans-serif">E1 99 23 =
99 15 1</font></div><div class=3D"gmail_default" style><font face=3D"tahoma=
, sans-serif">R16 24 23 25</font></div><div class=3D"gmail_default" style><=
font face=3D"tahoma, sans-serif">D5 26 24 DX</font></div><div class=3D"gmai=
l_default" style><font face=3D"tahoma, sans-serif">V6 26 22 0.65V</font></d=
iv><div class=3D"gmail_default" style><font face=3D"tahoma, sans-serif">R17=
23 25 25</font></div><div class=3D"gmail_default" style><font face=3D"taho=
ma, sans-serif">D6 25 27 DX</font></div><div class=3D"gmail_default" style>=
<font face=3D"tahoma, sans-serif">V7 22 27 0.65V</font></div><div class=3D"=
gmail_default" style><font face=3D"tahoma, sans-serif">V5 22 21 0.18V</font=
></div><div class=3D"gmail_default" style><font face=3D"tahoma, sans-serif"=
>D4 21 15 DX</font></div><div class=3D"gmail_default" style><font face=3D"t=
ahoma, sans-serif">V4 20 22 0.18V</font></div><div class=3D"gmail_default" =
style><font face=3D"tahoma, sans-serif">D3 15 20 DX</font></div><div class=
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