Version 4 SHEET 1 1168 680 WIRE 224 -176 176 -176 WIRE 304 -176 224 -176 WIRE 176 -96 176 -176 WIRE 304 0 304 -16 WIRE 528 16 304 16 WIRE 32 48 -112 48 WIRE 80 48 32 48 WIRE 176 48 176 -16 WIRE 176 48 144 48 WIRE 224 48 176 48 WIRE 256 48 224 48 WIRE -160 64 -256 64 WIRE 256 80 144 80 WIRE -256 96 -256 64 WIRE -160 96 -160 64 WIRE -112 96 -112 48 WIRE 144 128 144 80 WIRE 224 128 224 48 WIRE 64 368 16 368 WIRE 144 368 144 208 WIRE 144 368 64 368 WIRE 272 368 144 368 WIRE 464 416 336 416 FLAG -256 176 0 FLAG -160 176 0 FLAG -112 176 0 FLAG 32 208 0 FLAG 224 208 0 FLAG 224 -256 0 FLAG 304 96 0 FLAG 64 448 0 FLAG 304 -176 PLUS IOPIN 304 -176 Out FLAG -64 368 PLUS IOPIN -64 368 In FLAG 144 432 0 FLAG 272 464 0 FLAG 528 96 0 FLAG 544 416 0 SYMBOL ind2 -176 80 R0 WINDOW 0 -20 40 Left 2 WINDOW 3 -25 67 Left 2 SYMATTR InstName L1 SYMATTR Value 1n SYMATTR Type ind SYMBOL ind2 -96 192 R180 WINDOW 0 -48 86 Left 2 WINDOW 3 -22 58 Right 2 SYMATTR InstName L2 SYMATTR Value 105µ SYMATTR Type ind SYMBOL ind 48 224 R180 WINDOW 0 -37 67 Left 2 WINDOW 3 -56 43 Left 2 SYMATTR InstName L3 SYMATTR Value 4.7m SYMBOL ind 288 -192 R0 WINDOW 3 38 61 Left 2 SYMATTR InstName L4 SYMATTR Value 0.33m SYMBOL current -256 96 R0 WINDOW 3 -171 -10 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR Value sine(0 1 1meg) SYMATTR InstName I1 SYMBOL res 16 32 R0 SYMATTR InstName R1 SYMATTR Value 68k SYMBOL cap 144 32 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 -30 79 VTop 2 SYMATTR InstName C1 SYMATTR Value 500p SYMBOL xdgnmos 256 0 R0 WINDOW 0 63 46 Left 2 SYMATTR InstName U1 SYMATTR SpiceModel BF992 SYMATTR Value BF992 SYMBOL res 160 -112 R0 WINDOW 0 -43 19 Left 2 WINDOW 3 -42 -2 Left 2 SYMATTR InstName R2 SYMATTR Value 680k SYMBOL res 208 112 R0 SYMATTR InstName R3 SYMATTR Value 470k SYMBOL voltage 224 -160 R180 WINDOW 0 24 96 Left 2 WINDOW 3 24 16 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 12 SYMBOL res 128 112 R0 SYMATTR InstName R4 SYMATTR Value 150k SYMBOL cap 128 368 R0 SYMATTR InstName C2 SYMATTR Value 1µ SYMBOL res 48 352 R0 SYMATTR InstName R5 SYMATTR Value 82k SYMBOL res 32 352 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R6 SYMATTR Value 33k SYMBOL npn 336 368 M0 SYMATTR InstName Q1 SYMBOL res 512 0 R0 SYMATTR InstName R7 SYMATTR Value 4.7k SYMBOL voltage 448 416 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 -32 56 VBottom 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V2 SYMATTR Value 4 SYMBOL res 288 -112 R0 WINDOW 3 38 61 Left 2 SYMATTR InstName R8 SYMATTR Value 750 TEXT -192 240 Left 2 !K1 L1 L2 2e-5 TEXT -392 -280 Left 2 !.include dg_nmos.lib TEXT -428 260 Left 2 !.tran 100µ