Version 4 SHEET 1 4692 2996 WIRE 2528 1744 2528 1728 WIRE 2672 1744 2672 1728 WIRE 1968 1760 1968 1728 WIRE 1456 1808 1456 1728 WIRE 2192 1824 2192 1728 WIRE 2528 1840 2528 1808 WIRE 2672 1840 2672 1824 WIRE 2672 1840 2528 1840 WIRE 2816 1840 2672 1840 WIRE 1968 1872 1968 1840 WIRE 1968 1872 1632 1872 WIRE 2528 1872 2528 1840 WIRE 1968 1888 1968 1872 WIRE 832 1936 832 1728 WIRE 1456 1952 1456 1888 WIRE 1568 1952 1456 1952 WIRE 1776 1952 1568 1952 WIRE 2432 1952 2160 1952 WIRE 2480 1952 2432 1952 WIRE 1632 1984 1632 1872 WIRE 2432 1984 2432 1952 WIRE 2192 2000 2192 1904 WIRE 1456 2096 1456 1952 WIRE 1696 2096 1680 2096 WIRE 1776 2096 1760 2096 WIRE 2192 2096 2192 2064 WIRE 2192 2096 2160 2096 WIRE 2320 2096 2192 2096 WIRE 2528 2096 2528 1968 WIRE 2528 2096 2400 2096 WIRE 1568 2112 1568 1952 WIRE 2528 2128 2528 2096 WIRE 2432 2144 2432 2064 WIRE 832 2256 832 2016 WIRE 1456 2256 1456 2176 WIRE 1456 2256 832 2256 WIRE 1568 2256 1568 2176 WIRE 1568 2256 1456 2256 WIRE 1632 2256 1632 2048 WIRE 1632 2256 1568 2256 WIRE 1680 2256 1680 2096 WIRE 1680 2256 1632 2256 WIRE 1968 2256 1968 2160 WIRE 1968 2256 1680 2256 WIRE 2432 2256 2432 2208 WIRE 2432 2256 1968 2256 WIRE 2528 2256 2528 2208 WIRE 2528 2256 2432 2256 FLAG 2816 1840 OUT FLAG 832 2256 IN FLAG 832 1728 0 FLAG 1456 1728 0 FLAG 1968 1728 0 FLAG 2192 1728 0 FLAG 2528 1728 0 FLAG 2672 1728 0 SYMBOL nmos 2480 1872 R0 WINDOW 0 101 14 Right 2 WINDOW 3 140 76 Right 2 SYMATTR InstName M1 SYMATTR Value IRF530 SYMBOL res 2544 2112 M0 WINDOW 0 -38 37 Left 2 WINDOW 3 -56 78 Left 2 SYMATTR InstName R6 SYMATTR Value 20m SYMBOL res 1440 1792 R0 SYMATTR InstName R4 SYMATTR Value 442K SYMBOL cap 1552 2112 R0 SYMATTR InstName C1 SYMATTR Value 10n SYMBOL res 1440 2080 R0 SYMATTR InstName R7 SYMATTR Value 34.8K SYMBOL voltage 832 2032 M180 WINDOW 3 24 16 Left 2 WINDOW 39 24 -5 Left 2 WINDOW 0 24 96 Left 2 WINDOW 123 24 -26 Left 2 SYMATTR Value PWL(0 0 1m 0 1.001m -48 220m -48 221m -70) SYMATTR InstName V1 SYMBOL cap 2416 2144 R0 SYMATTR InstName C3 SYMATTR Value 22n SYMBOL res 2416 1968 R0 SYMATTR InstName R2 SYMATTR Value 10 SYMBOL res 2656 1728 R0 SYMATTR InstName Rload SYMATTR Value 50 SYMBOL cap 2512 1744 R0 SYMATTR InstName C5 SYMATTR Value 100µ SYMBOL cap 1760 2080 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C2 SYMATTR Value 220n SYMBOL cap 1616 1984 R0 SYMATTR InstName C4 SYMATTR Value 1µ SYMBOL res 1952 1744 R0 SYMATTR InstName R1 SYMATTR Value 10K SYMBOL LTC4251-1 1968 2016 R0 SYMATTR InstName U1 SYMBOL res 2416 2080 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 22 SYMBOL zener 2208 2064 R180 WINDOW 0 -35 66 Left 2 WINDOW 3 -113 0 Left 2 SYMATTR InstName D1 SYMATTR Value BZX84C36 SYMATTR Description Diode SYMATTR Type diode SYMBOL res 2176 1808 R0 SYMATTR InstName R5 SYMATTR Value 31.6K TEXT 2656 2104 Left 2 !.tran 400m TEXT 744 2336 Left 2 !.model BZX84C36 D(IS=110.88E-18 N=.92657 RS=.85899 IKF=149.75 CJO=18.666E-12 M=.36733 VJ=.74368 ISR=42.919E-12 BV=36.134 IBV=.37878 TT=810.79E-9)