Version 4
SHEET 1 3572 680
WIRE 1360 -224 1360 -256
WIRE 1776 -224 1776 -256
WIRE 1632 -144 1456 -144
WIRE 1776 -112 1904 -240
WIRE 1776 -112 1776 -144
WIRE 1856 -112 1776 -112
WIRE 2000 -112 1920 -112
WIRE 2192 -112 2000 -112
WIRE 1072 -96 1072 -240
WIRE 1360 -96 1216 -240
WIRE 1360 -96 1360 -144
WIRE 1488 -96 1360 -96
WIRE 1520 -96 1488 -96
WIRE 1632 -96 1632 -144
WIRE 1632 -96 1600 -96
WIRE 1776 -96 1776 -112
WIRE 1776 -96 1632 -96
WIRE 1360 -48 1360 -96
WIRE 1776 -48 1776 -96
WIRE 1488 -16 1488 -96
WIRE 1536 -16 1488 -16
WIRE 1632 -16 1632 -96
WIRE 1632 -16 1600 -16
WIRE 1456 16 1456 -144
WIRE 1488 16 1488 -16
WIRE 1680 16 1488 16
WIRE 1360 64 1360 16
WIRE 1392 64 1360 64
WIRE 1776 64 1776 16
WIRE 1776 64 1744 64
WIRE 1360 160 1360 64
WIRE 1456 160 1456 112
WIRE 1568 160 1456 160
WIRE 1680 160 1680 112
WIRE 1680 160 1568 160
WIRE 1776 160 1776 64
WIRE 1568 224 1568 160
WIRE 1568 352 1568 304
FLAG 1072 -16 0
FLAG 1072 -240 V+
FLAG 1568 352 0
FLAG 1360 -256 V+
FLAG 1776 -256 V+
FLAG 2000 -32 0
FLAG 2000 -192 V+
FLAG 1360 240 0
FLAG 1776 240 0
FLAG 2192 -112 OUTPUT
FLAG 1904 -240 B
FLAG 1216 -240 A
SYMBOL voltage 1072 -112 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL npn 1392 16 R0
WINDOW 3 -7 122 Left 2
SYMATTR InstName Q3
SYMATTR Value Qmmbt3904lt1
SYMBOL res 1344 144 R0
SYMATTR InstName R8
SYMATTR Value 1k
SYMBOL npn 1744 16 M0
WINDOW 3 -17 121 Left 2
SYMATTR InstName Q4
SYMATTR Value Qmmbt3904lt1
SYMBOL ind 1504 -80 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L2
SYMATTR Value 1µ
SYMBOL cap 1600 -32 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C5
SYMATTR Value 470p
SYMATTR SpiceLine V=6.3 Irms=42.2m Rser=0.97891 Lser=0
SYMBOL res 1760 -240 R0
SYMATTR InstName R11
SYMATTR Value 200
SYMBOL cap 1920 -128 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 100p
SYMBOL res 1984 -208 R0
SYMATTR InstName R1
SYMATTR Value 10k
SYMBOL res 1984 -128 R0
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL res 1344 -240 R0
SYMATTR InstName R3
SYMATTR Value 200
SYMBOL res 1760 144 R0
SYMATTR InstName R4
SYMATTR Value 1k
SYMBOL res 1552 208 R0
SYMATTR InstName R5
SYMATTR Value 500
SYMBOL diode 1344 -48 R0
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL diode 1760 -48 R0
SYMATTR InstName D2
SYMATTR Value 1N4148
TEXT 950 48 Left 2 !.tran 300u startup
TEXT 720 184 Left 2 !.step temp 20 50 10
TEXT 720 96 Left 2 !.meas t1 find time when V(OUTPUT)=V(V+)/2 rise=200\n.meas t2 find time when V(OUTPUT)=V(V+)/2 rise=210\n.meas tran freq param 10/(t2-t1)
TEXT 2744 96 Left 2 !.MODEL Qmmbt3904lt1 npn\n+IS=7.11183e-14 BF=623.138 NF=1.08171 VAF=69.5734\n+IKF=0.00963147 ISE=3.03185e-11 NE=2.15109 BR=0.110332\n+NR=1.18876 VAR=105.037 IKR=0.0963147 ISC=1.0184e-13\n+NC=1.99763 RB=5.77248 IRB=0.193107 RBM=5.77248\n+RE=0.0001 RC=2.03533 XTB=0.1 XTI=2.74837\n+EG=1.206 CJE=1e-13 VJE=0.976899 MJE=0.23\n+TF=3.62047e-10 XTF=0.813416 VTF=7.64754 ITF=0.0112391\n+CJC=3.72251e-12 VJC=0.4 MJC=0.232667 XCJC=0.8\n+FC=0.21244 CJS=0 VJS=0.75 MJS=0.5\n+TR=1e-07 PTF=0 KF=0 AF=1