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[Help-gnucap] Model for led diode
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From: |
Jesus Genicio |
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Subject: |
[Help-gnucap] Model for led diode |
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Date: |
Thu, 28 Aug 2008 23:55:14 +0200 |
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] Model for led diode,
Jesus Genicio <=