Version 4 SHEET 1 3476 836 WIRE 720 -272 544 -272 WIRE 976 -272 800 -272 WIRE 544 -224 544 -272 WIRE 976 -208 976 -272 WIRE 544 -80 544 -144 WIRE 976 -80 976 -144 FLAG 976 -80 0 FLAG 544 -80 0 SYMBOL voltage 544 -240 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value PULSE(0 10 2m 10n 10n 10m 2) SYMBOL res 704 -256 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R1 SYMATTR Value 3.3Meg SYMBOL LT1389-5 976 -176 R0 SYMATTR InstName U1 TEXT 1088 -56 Left 2 !.tran 20m