Q1 N001 N002 N003 0 6301
R1 N009 0 270
C1 N009 0 1µ
V1 vcc 0 5
R2 vcc N008 33k
R3 N008 0 16k
C2 N008 P001 1µ
R4 P001 N007 5k
V2 N007 0 SINE(0 .25m 2meg) AC 1
R5 vcc N001 2.4k
C3 N002 0 1µ
R6 N002 0 16k
R7 vcc N002 33k
R8 N010 0 910
C4 N010 0 1µ
R11 vdd vout 1.5k
R9 N006 0 2k
R10 N005 0 1k
V3 vdd 0 15
Q2 N003 N005 N009 0 6301
Q3 vcc N008 N005 0 6301
Q4 vcc N001 N006 0 6301
Q5 vout vcc N004 0 6301
Q6 N004 N006 N010 0 6301
C6 vout 0 10p
.model NPN NPN
.model PNP PNP
.model 6301 NPN(IS=10E-15 VAF=50 BF=100 RB=200 TF=4.8E-10 CJE=8E-12 CJC=7E-12)
*
* 6301 is my measured/calculated spice model of the 2n3904 npn bjt that we used
*
.lib C:\Program Files\LTC\LTspiceIV\lib\cmp\standard.bjt
.tran 0 1.003m 1m
.backanno
.end