Version 4 SHEET 1 4176 4364 WIRE 2320 -6816 2256 -6816 WIRE 2816 -6816 2320 -6816 WIRE 2896 -6816 2816 -6816 WIRE 3024 -6816 2896 -6816 WIRE 3104 -6816 3024 -6816 WIRE 3216 -6816 3104 -6816 WIRE 3360 -6816 3216 -6816 WIRE 3440 -6816 3360 -6816 WIRE 3616 -6816 3440 -6816 WIRE 2816 -6768 2816 -6816 WIRE 3104 -6736 3104 -6816 WIRE 3360 -6720 3360 -6816 WIRE 3616 -6688 3616 -6816 WIRE 3216 -6656 3216 -6816 WIRE 2816 -6640 2816 -6688 WIRE 2944 -6640 2816 -6640 WIRE 3104 -6640 3104 -6656 WIRE 3168 -6640 3104 -6640 WIRE 2320 -6576 2320 -6816 WIRE 3440 -6576 3440 -6816 WIRE 2816 -6544 2816 -6640 WIRE 3024 -6544 3024 -6816 WIRE 3616 -6544 3616 -6608 WIRE 3216 -6528 3216 -6560 WIRE 3264 -6528 3216 -6528 WIRE 3360 -6528 3360 -6656 WIRE 3360 -6528 3344 -6528 WIRE 3376 -6528 3360 -6528 WIRE 2944 -6416 2944 -6640 WIRE 2320 -6384 2320 -6496 WIRE 2544 -6384 2320 -6384 WIRE 2816 -6384 2816 -6464 WIRE 2816 -6384 2800 -6384 WIRE 3216 -6352 3216 -6528 WIRE 2944 -6304 2944 -6352 WIRE 3104 -6288 3104 -6640 WIRE 2544 -6256 2512 -6256 WIRE 2896 -6256 2896 -6816 WIRE 2896 -6256 2800 -6256 WIRE 3440 -6224 3440 -6480 WIRE 3440 -6224 3392 -6224 WIRE 3024 -6208 3024 -6464 WIRE 3056 -6208 3024 -6208 WIRE 2512 -6192 2512 -6256 WIRE 2544 -6192 2512 -6192 WIRE 3216 -6192 3216 -6352 WIRE 3440 -6192 3440 -6224 WIRE 2320 -6144 2320 -6384 WIRE 2944 -6128 2944 -6240 WIRE 2976 -6128 2944 -6128 WIRE 2512 -6096 2512 -6192 WIRE 3024 -6080 3024 -6112 WIRE 3104 -6080 3104 -6192 WIRE 3216 -6080 3216 -6112 WIRE 3440 -6080 3440 -6112 WIRE 2944 -6032 2944 -6128 WIRE 3392 -6032 3392 -6224 WIRE 3392 -6032 2944 -6032 FLAG 3616 -6544 0 FLAG 3104 -6080 0 FLAG 3216 -6080 0 FLAG 2320 -6064 0 FLAG 3440 -6080 0 FLAG 3024 -6080 0 FLAG 3216 -6352 out FLAG 2512 -6096 0 SYMBOL res 3232 -6096 R180 WINDOW 0 -67 57 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName Load SYMATTR Value 0.15 SYMBOL res 3088 -6752 R0 SYMATTR InstName R14 SYMATTR Value 4.7K SYMBOL nmos 3056 -6288 R0 SYMATTR InstName M4 SYMATTR Value BSS123 SYMBOL pmos 3168 -6560 M180 SYMATTR InstName M7 SYMATTR Value FDS4465 SYMBOL res 2304 -6160 R0 SYMATTR InstName R1 SYMATTR Value 2.5k SYMBOL pnp 3376 -6480 M180 SYMATTR InstName Q1 SYMATTR Value 2N2907 SYMBOL res 3360 -6544 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R2 SYMATTR Value 1k SYMBOL res 3424 -6208 R0 SYMATTR InstName R3 SYMATTR Value 4.7k SYMBOL nmos 2976 -6208 R0 SYMATTR InstName M1 SYMATTR Value BSS123 SYMBOL res 3008 -6560 R0 SYMATTR InstName R4 SYMATTR Value 4.7k SYMBOL cap 3344 -6720 R0 SYMATTR InstName C1 SYMATTR Value 0.1µf SYMBOL res 2800 -6784 R0 SYMATTR InstName R7 SYMATTR Value 4.7k SYMBOL voltage 3616 -6704 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value PULSE(14 9 10m 30m 30m 100m) SYMBOL References\\LT1431 2672 -6288 M0 SYMATTR InstName U2 SYMBOL res 2304 -6592 R0 SYMATTR InstName R5 SYMATTR Value 7.5k SYMBOL diode 2928 -6416 R0 SYMATTR InstName D1 SYMATTR Value 1N914 SYMBOL zener 2960 -6240 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D2 SYMATTR Value 1N750 SYMBOL voltage 2816 -6560 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V2 SYMATTR Value 2.2v TEXT 3592 -6184 Left 2 !.tran 200m uic