Version 4
SHEET 1 1296 1056
WIRE 320 -128 288 -128
WIRE 624 -128 400 -128
WIRE 16 -32 -16 -32
WIRE 400 -32 96 -32
WIRE 624 -32 624 -128
WIRE 656 -32 624 -32
WIRE 400 16 400 -32
WIRE 656 16 400 16
WIRE 960 16 912 16
WIRE -352 64 -368 64
WIRE 656 64 -272 64
WIRE 656 112 80 112
WIRE 160 160 144 160
WIRE 256 160 240 160
WIRE 656 160 256 160
WIRE 256 176 256 160
WIRE 368 208 352 208
WIRE 480 208 448 208
WIRE 656 208 480 208
WIRE 992 208 912 208
WIRE -224 224 -240 224
WIRE 80 224 80 112
WIRE 80 224 -144 224
WIRE 480 224 480 208
WIRE 992 224 992 208
WIRE 656 256 576 256
WIRE 256 272 256 256
WIRE 576 272 576 256
WIRE 480 320 480 304
WIRE 992 320 992 304
WIRE 784 336 784 320
WIRE 864 336 864 320
WIRE -64 368 -80 368
WIRE 144 368 144 160
WIRE 144 368 16 368
WIRE 576 368 576 352
WIRE 704 368 704 320
WIRE 704 368 576 368
WIRE 576 384 576 368
WIRE 864 416 864 400
WIRE 224 480 208 480
WIRE 352 480 352 208
WIRE 352 480 304 480
WIRE 576 480 576 464
FLAG 784 336 0
FLAG 480 320 0
FLAG 256 272 0
FLAG 288 -128 0
FLAG -368 64 0
FLAG -240 224 0
FLAG -80 368 0
FLAG 208 480 0
FLAG 576 480 0
FLAG 864 416 0
FLAG 960 16 _RST
FLAG 992 320 0
FLAG 992 208 _MR
FLAG -16 -32 0
SYMBOL LTC2930 784 112 R0
SYMATTR InstName U1
SYMBOL res 464 192 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 1400K
SYMBOL res 464 208 R0
SYMATTR InstName R6
SYMATTR Value 100K
SYMBOL res 240 160 R0
SYMATTR InstName R3
SYMATTR Value 100K
SYMBOL res 256 144 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 1020K
SYMBOL voltage 416 -128 M270
WINDOW 3 -32 56 VBottom 2
WINDOW 123 -74 56 VBottom 2
WINDOW 39 -53 56 VBottom 2
WINDOW 0 32 56 VTop 2
SYMATTR Value PWL(0 0 5 5 15 5 15.0001 4 16 4 16.0001 5)
SYMATTR InstName V1
SYMBOL voltage -256 64 M270
WINDOW 3 -32 56 VBottom 2
WINDOW 123 -74 56 VBottom 2
WINDOW 39 -53 56 VBottom 2
WINDOW 0 32 56 VTop 2
SYMATTR Value PWL(0 0 2.5 2.5 19 2.5 19.0001 1.5 20 1.5 20.0001 2.5)
SYMATTR InstName V3
SYMBOL voltage -128 224 R90
WINDOW 3 32 56 VTop 2
WINDOW 123 74 56 VTop 2
WINDOW 39 53 56 VTop 2
WINDOW 0 -32 56 VBottom 2
SYMATTR Value PWL(0 0 1.8 1.8 21 1.8 21.0001 .8 22 .8 22.0001 1.8)
SYMATTR InstName V4
SYMBOL voltage 32 368 R90
WINDOW 3 32 56 VTop 2
WINDOW 123 74 56 VTop 2
WINDOW 39 53 56 VTop 2
WINDOW 0 -32 56 VBottom 2
SYMATTR Value PWL(0 0 6 6 23 6 23.0001 5 24 5 24.0001 6)
SYMATTR InstName V5
SYMBOL voltage 320 480 R90
WINDOW 3 32 56 VTop 2
WINDOW 123 74 56 VTop 2
WINDOW 39 53 56 VTop 2
WINDOW 0 -32 56 VBottom 2
SYMATTR Value PWL(0 0 8 8 25 8 25.0001 7 26 7 26.0001 8)
SYMATTR InstName V6
SYMBOL res 560 256 R0
SYMATTR InstName R1
SYMATTR Value 59K
SYMBOL res 560 368 R0
SYMATTR InstName R2
SYMATTR Value 40.2K
SYMBOL cap 848 336 R0
SYMATTR InstName C1
SYMATTR Value 1500p
SYMBOL voltage 992 208 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V7
SYMATTR Value PULSE(5 0 10 1p 1p 2)
SYMBOL voltage 112 -32 R90
WINDOW 0 -32 56 VBottom 2
WINDOW 3 32 56 VTop 2
WINDOW 123 74 56 VTop 2
WINDOW 39 53 56 VTop 2
SYMATTR InstName V2
SYMATTR Value PWL(0 0 3.3 3.3 17 3.3 17.0001 2.3 18 2.3 18.001 3.3)
TEXT 1040 440 Left 2 !.tran 30