al davis wrote: > On Monday 22 May 2006 15:21, Markus Feldmann wrote: >>> mfg Markus >> Its an OPV µA741. > > I think you are asking for a 741 model. > > I don't have one, so my recommendation is to google for "741 > spice model" and see what you find. > > That is usually the way to find models. There are so many I > can't keep track of them all.
Hey, I've got one model, but i didn't know how to get this to work. Here it comes the opamp 741, *////////////////////////////////////////////////////////// *LM741 OPERATIONAL AMPLIFIER MACRO-MODEL *////////////////////////////////////////////////////////// * * connections: non-inverting input * | inverting input * | | positive power supply * | | | negative power supply * | | | | output * | | | | | * | | | | | .SUBCKT LM741/NS 1 2 99 50 28 ****************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 *$ Is that ok? Or shall i change some lines ? How can i use this file in my circuit? (for example, ".subckt LM741/NS" ?) I don't want to copy this file directly into my circuit, but to include this. mfg Markus _______________________________________________ Help-gnucap mailing list [email protected] http://lists.gnu.org/mailman/listinfo/help-gnucap
