Hello: I try this circuit for swicht a TTL signal and light a led...
gnucap> list .model Q2N2219A npn (level=1 kf= 0. af= 1. bf=NA( 100.) br=NA( 1.) is=NA( 100.E-18) nf=NA( 1.) nr=NA( 1.) isc=NA( 0.) c4=NA( 0.) nc=NA( 2.) ise=NA( 0.) c2=NA( 0.) ne=NA( 1.5) rb=NA( 0.) rbm=NA( 0.) re=NA( 0.) rc=NA( 0.) cjc=NA( 0.) cje=NA( 0.) cjs=NA( 0.) fc=NA( 0.5) mjc=NA( 0.33) mje=NA( 0.33) mjs=NA( 0.) vjc=NA( 0.75) vje=NA( 0.75) vjs=NA( 0.75) xcjc=NA( 1.) itf=NA( 0.) ptf=NA( 0.) tf=NA( 0.) tr=NA( 0.) xtf=NA( 0.) xtb=NA( 0.) xti=NA( 3.) eg=NA( 1.11)) *+() Vcc ( 1 0 ) DC 5. Vin ( 5 0 ) PULSE iv= 0. pv= 5. delay= 1. rise= 0. fall= 0. width= 2. period= 4. Rc ( 1 8 ) 122. Rb ( 5 2 ) 12.K Rled ( 8 3 ) 121. Q1 ( 3 2 0 ) Q2N2219A area= 1. The result is correct: gnucap> tran 0 2 0.1 #Time V(5) V(1) V(Rled) 0. 0. 5. 2.42n 0.1 0. 5. 2.42n 0.2 0. 5. 2.42n 0.3 0. 5. 2.42n 0.4 0. 5. 2.42n 0.5 0. 5. 2.42n 0.6 0. 5. 2.42n 0.7 0. 5. 2.42n 0.8 0. 5. 2.42n 0.9 0. 5. 2.42n 1. 0. 5. 2.42n 1.1 5. 5. 2.4256 1.2 5. 5. 2.4256 1.3 5. 5. 2.4256 1.4 5. 5. 2.4256 1.5 5. 5. 2.4256 1.6 5. 5. 2.4256 1.7 5. 5. 2.4256 1.8 5. 5. 2.4256 1.9 5. 5. 2.4256 2. 5. 5. 2.4256 Rled must be one led. If i change Rled for a diode 1N4004, example. The results is gnucap> tran 0 2 0.1 #Time V(5) V(1) V(D1) 0. 0. 5. 0.19557 0.1 0. 5. 0.19557 0.2 0. 5. 0.19557 0.3 0. 5. 0.19557 0.4 0. 5. 0.19557 0.5 0. 5. 0.19557 0.6 0. 5. 0.19557 0.7 0. 5. 0.19557 0.8 0. 5. 0.19557 0.9 0. 5. 0.19557 1. 0. 5. 0.19557 1.1 5. 5. 0.74569 1.2 5. 5. 0.74569 1.3 5. 5. 0.74569 1.4 5. 5. 0.74569 1.5 5. 5. 0.74569 1.6 5. 5. 0.74569 1.7 5. 5. 0.74569 1.8 5. 5. 0.74569 1.9 5. 5. 0.74569 2. 5. 5. 0.74569 But V(D1) must be 2.42 for light diode. If change Rc, de V(D1) is equal but vce change... gnucap> build >Rc 1 8 72 > gnucap> tran 0 2 0.1 #Time V(5) V(Rc) V(D1) ic(Q1) vce(Q1) 0. 0. 1.7437n 0.19557 14.414p 4.8044 0.1 0. 1.7437n 0.19557 14.414p 4.8044 0.2 0. 1.7437n 0.19557 14.414p 4.8044 0.3 0. 1.7437n 0.19557 14.414p 4.8044 0.4 0. 1.7437n 0.19557 14.414p 4.8044 0.5 0. 1.7437n 0.19557 14.414p 4.8044 0.6 0. 1.7437n 0.19557 14.414p 4.8044 0.7 0. 1.7437n 0.19557 14.414p 4.8044 0.8 0. 1.7437n 0.19557 14.414p 4.8044 0.9 0. 1.7437n 0.19557 14.414p 4.8044 1. 0. 1.7437n 0.19557 14.414p 4.8044 1.1 5. 2.4805 0.74665 0.034452 1.7728 1.2 5. 2.4805 0.74665 0.034452 1.7728 1.3 5. 2.4805 0.74665 0.034452 1.7728 1.4 5. 2.4805 0.74665 0.034452 1.7728 1.5 5. 2.4805 0.74665 0.034452 1.7728 1.6 5. 2.4805 0.74665 0.034452 1.7728 1.7 5. 2.4805 0.74665 0.034452 1.7728 1.8 5. 2.4805 0.74665 0.034452 1.7728 1.9 5. 2.4805 0.74665 0.034452 1.7728 2. 5. 2.4805 0.74665 0.034452 1.7728 ¿who is the model for led diode.? Regards... _______________________________________________ Help-gnucap mailing list [email protected] http://lists.gnu.org/mailman/listinfo/help-gnucap
