X-Authentication-Warning: delorie.com: mail set sender to geda-help-bounces using -f X-Recipient: geda-help AT delorie DOT com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:from:date:message-id:subject:to:content-type; bh=DoV2NnWUTotJk8SAn1H+zsOWKzwlMGWVX17eny5k2/E=; b=PsCecK7v4i55oxBcn58Q1+mmakoCGJ3LnBxxYdOoKy/tFlslEUorlhQKzehh9BRJUl uVrCYaguxl0SuKMBXeVBq5Em2orgVNSBQkbWTzDy6xjXlG/4Ca4ZhcaaramWSUbSKcjS G7318Z0MWP/UjId7sabUFcmUUK/T4KHDC+eI/4gkgGU9FEayHxQ+vzriro4WusimNjFR gZrlbdoQowML+3WeZTcY/ZtXatzIGfi9xZJYGhhvl3kVgVkTu4XqkxTNAaurygbnsXtQ vOtFs+tsgNXW8Ah0txUtUE0WdLfk3WNB/3zE/y726YdCx1HHdEtjBzWnkpHnkhbVm7ps IabQ== X-Received: by 10.112.54.130 with SMTP id j2mr20846458lbp.41.1412570702884; Sun, 05 Oct 2014 21:45:02 -0700 (PDT) MIME-Version: 1.0 From: Jayer Fernandes Date: Sun, 5 Oct 2014 23:44:42 -0500 Message-ID: Subject: [geda-help] LM741 OpAmp To: geda-help AT delorie DOT com Content-Type: multipart/mixed; boundary=001a11c332b6f7454d0504b9bece Reply-To: geda-help AT delorie DOT com --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
Hi,

I'm new to gEDA and ngspice. I'm trying my be= st to learn it using whatever I can find online.
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.
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.

I've attache= d my netlist as follows along with mmy schematic
* gnetlist -g spice-sdb -o inverti= ng.net inverting.sch
********************************************= *************
* 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*
* spice-sdb= version 4.28.2007 by SDB -- =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 *
* provides advanced spice netlisting capability. =C2=A0 = =C2=A0 =C2=A0 =C2=A0*
* Documentation at http://www.brorson.com/gEDA/SPICE/ =C2=A0 *
**= *******************************************************
*vvvvvvvv =C2= =A0Included SPICE model from /home/jayerfernandes/Desktop/NgSpice/models/LM= 741.mod vvvvvvvv
*//////////////////////////////////////////////////= ////////////////////
* (C) National Semiconductor, Inc.
<= div class=3D"gmail_default" style>* Model= s developed and under copyright by:
* National Semiconductor, Inc. = =C2=A0

*//////////////////////////////////////////////////= ///////////////////
* Legal Notice: This material is intended for fre= e software support.
* The file may be copied, and distributed; howeve= r, reselling the=C2=A0
* =C2=A0material is illegal

<= /div>
*= ////////////////////////////////////////////////////////////////////=
= * For ordering or technical information on these models, contact:
* N= ational Semiconductor's Customer Response Center
* =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
* =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
* =C2=A0<= a href=3D"mailto:amps-apps AT galaxy DOT nsc DOT com">amps-apps AT galaxy DOT nsc DOT com

*//////////////////////////////////////////////////////////
*LM741 OPERATIONAL AMPLIFIER MACRO-MODEL
*//////////////////////= ////////////////////////////////////
*
* connections: =C2=A0 = =C2=A0 =C2=A0non-inverting input
* =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0= =C2=A0 =C2=A0 =C2=A0 =C2=A0 | =C2=A0 inverting input
* =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
* =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
* =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
* =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 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 | =C2=A0 | =C2=A0 |= =C2=A0 | =C2=A0 |
.SUBCKT LM741 =C2=A0 =C2=A0 =C2=A0 1 =C2=A0 2 =C2= =A099 =C2=A050 =C2=A028
*
*Features:
*Improved performanc= e over industry standards
*Plug-in replacement for LM709,LM201,MC1439= ,748
*Input and output overload protection
*
************= ****INPUT STAGE**************
*
IOS 2 1 20N
*^Input offse= t 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
<= div class=3D"gmail_default" style>*Fp2=3D= 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=3D5 Hz
R5 98 9 95.4= 93MEG
C3 98 9 333.33P
= *
***************POLE STAGE********= *******
*
*Fp=3D30 MHz
G3 98 15 9 49 1E-6
<= div class=3D"gmail_default" style>R12 98 = 15 1MEG
C5 98 15 5.3052E-15
*
*********COMMON-MODE ZERO S= TAGE*********
*
*Fpcm=3D300 Hz
G4 98 16 3 49 3.1623E-8
L2 98 17 530.5M
R13 17 16 1K
*
**************OUTPUT S= TAGE**************
*
<= font face=3D"tahoma, sans-serif">F6 50 99 POLY(1) V6 450U 1
E1 99 23 = 99 15 1
R16 24 23 25
<= font face=3D"tahoma, sans-serif">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
*
<= font face=3D"tahoma, sans-serif">***************MODELS USED**************
*
.MODEL DX D(IS=3D1E-15)
.MODEL QX NPN(BF=3D625)
*<= /font>
.ENDS

*^^^^^^^^ =C2=A0End of included SPICE model fr= om /home/jayerfernandes/Desktop/NgSpice/models/LM741.mod ^^^^^^^^
*
*=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =C2=A0Begin SPICE netlist = of main design =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
X1 0 3 Vcc Vee O= utput unknown
V3 0 in AC SIN(0 1m 50)
R3 0 1 250 =C2=A0<= /div>
R= 2 3 Output 47k =C2=A0
R1 2 3 1k =C2=A0
C3 3 Output 3300p =C2=A0=
C2 in 2 180u =C2=A0
<= font face=3D"tahoma, sans-serif">C1 Output 1 75u =C2=A0
V2 Vcc 0 15V<= /font>
V1 Vee 0 -15V
.end


<= b style=3D"font-size:large">Jayer F= ernandes
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