The Monostable Multivibrator

** Circuit Description **

* op-amp subcircuit

.subckt uA741         1 2 3 4 5
* connections:        | | | | |
*                     | | | | |
*   non-inverting input | | | |
*         inverting input | | |
*     positive power supply | |
*       negative power supply |
*                        output
*
*
  c1   11 12 8.661E-12
  c2    6  7 30.00E-12
  dc    5 53 dx
  de   54  5 dx
  dlp  90 91 dx
  dln  92 90 dx
  dp    4  3 dx
  egnd 99  0 poly(2) (3,0) (4,0) 0 .5 .5
  fb    7 99 poly(5) vb vc ve vlp vln 0 10.61E6 -10E6 10E6 10E6 -10E6
  ga    6  0 11 12 188.5E-6
  gcm   0  6 10 99 5.961E-9
  iee  10  4 dc 15.16E-6
  hlim 90  0 vlim 1K
  q1   11  2 13 qx
  q2   12  1 14 qx
  r2    6  9 100.0E3
  rc1   3 11 5.305E3
  rc2   3 12 5.305E3
  re1  13 10 1.836E3
  re2  14 10 1.836E3
  ree  10 99 13.19E6
  ro1   8  5 50
  ro2   7 99 100
  rp    3  4 18.16E3
  vb    9  0 dc 0
  vc    3 53 dc 1
  ve   54  4 dc 1
  vlim  7  8 dc 0
  vlp  91  0 dc 40
  vln   0 92 dc 40
.model dx D(Is=800.0E-18 Rs=1)
.model qx NPN(Is=800.0E-18 Bf=93.75)
.ends uA741

** Main Circuit **
* power supplies
Vcc 5 0 DC +15V
Vee 6 0 DC -15V
* input trigger signal + circuit
Vtrig 7 0 PWL ( 0,+15V 10us,+15V 10.01us,0V 60us,0V 60.01us,+15V 
+ 10ms, +15V 10.00001ms,0V 10.090ms,0V 10.09001ms,+15V 1s,+15V )
C2 7 4 0.1uF 
R4 4 0 100k
D2 2 4 D1N4148
* monostable multivibrator circuit
Xopamp1 2 1 5 6 3 uA741
R1 2 0 1k
R2 2 3 9k
R3 1 3 50k
C1 1 0 0.1uF
D1 1 0 D1N4148
* model statements
.model D1N4148 D (Is=0.1p Rs=16 CJO=2p Tt=12n Bv=100 Ibv=0.1p)
** Analysis Requests **
.IC V(3)=+15V
.TRAN 1ms 2ms 0ms
** Output Requests **
.PLOT TRAN V(7) V(3) V(1)
.probe 
.end