Version 4
SHEET 1 1728 824
WIRE 192 -80 192 -48
WIRE -128 -80 -128 -48
WIRE -64 0 32 0
WIRE 32 0 32 80
WIRE 32 0 128 0
WIRE 32 80 -128 80
WIRE -128 80 -128 48
WIRE 192 48 192 80
WIRE 368 80 192 80
WIRE 416 96 416 352
WIRE 192 448 32 448
WIRE 32 448 32 480
WIRE 32 448 -128 448
WIRE 192 -160 192 -192
WIRE 192 -192 -128 -192
WIRE -128 -192 -128 -160
WIRE 416 0 416 -192
WIRE 416 -192 608 -192
WIRE 608 -192 608 464
WIRE 32 560 32 592
WIRE 192 -192 224 -192
WIRE 32 592 224 592
WIRE 720 464 720 432
WIRE 864 464 864 432
WIRE 864 544 864 576
WIRE 864 576 720 576
WIRE 720 544 720 576
WIRE 464 400 416 400
WIRE 416 400 416 464
WIRE 256 352 288 352
WIRE 368 352 416 352
WIRE 416 352 416 400
WIRE -656 512 -656 544
WIRE 192 448 192 400
WIRE -128 448 -128 400
WIRE 192 144 192 80
WIRE 192 240 192 304
WIRE 992 192 992 272
WIRE 992 544 992 576
WIRE 992 576 864 576
WIRE 944 192 992 192
WIRE 864 192 256 192
WIRE 992 576 992 608
WIRE 720 576 608 576
WIRE 416 576 416 544
WIRE -272 352 -224 352
WIRE -352 352 -656 352
WIRE -656 352 -656 432
WIRE -656 64 -544 64
WIRE -384 80 -480 80
WIRE -512 48 -512 16
WIRE -512 16 -480 16
WIRE -512 112 -512 144
WIRE -512 144 -480 144
WIRE -656 -192 -656 -96
WIRE -544 -192 -656 -192
WIRE -400 -96 -384 -96
WIRE -384 -96 -384 80
WIRE -464 -192 -384 -192
WIRE -656 240 -656 96
WIRE -656 96 -544 96
WIRE -656 320 -656 352
WIRE -384 80 -352 80
WIRE -272 80 -224 80
WIRE -224 80 -224 352
WIRE -224 352 -192 352
WIRE 608 544 608 576
WIRE 608 576 416 576
WIRE -592 -96 -656 -96
WIRE -656 -96 -656 64
WIRE -512 -96 -464 -96
WIRE -128 144 -128 80
WIRE -128 240 -128 304
WIRE -64 192 -32 192
WIRE 48 192 80 192
WIRE 80 192 80 272
WIRE 80 272 992 272
WIRE 992 272 992 464
FLAG 224 -192 +15
IOPIN 224 -192 In
FLAG 224 592 -15
IOPIN 224 592 In
FLAG 992 608 0
FLAG 720 432 +15
IOPIN 720 432 Out
FLAG 864 432 -15
IOPIN 864 432 Out
FLAG 464 400 LISNS
IOPIN 464 400 Out
FLAG -656 544 0
FLAG -480 16 +15
IOPIN -480 16 In
FLAG -480 144 -15
IOPIN -480 144 In
FLAG -384 -192 LISNS
IOPIN -384 -192 In
SYMBOL nmos 368 0 R0
WINDOW 0 64 36 Left 0
WINDOW 3 63 59 Left 0
SYMATTR InstName M1
SYMATTR Value FDS6680A
SYMBOL npn 256 304 M0
WINDOW 0 87 35 Left 0
WINDOW 3 36 59 Left 0
SYMATTR InstName Q1
SYMATTR Value 2N2222
SYMBOL npn -192 304 R0
WINDOW 0 56 35 Left 0
WINDOW 3 56 57 Left 0
SYMATTR InstName Q2
SYMATTR Value 2N2222
SYMBOL pnp -64 48 R180
WINDOW 0 81 58 Left 0
WINDOW 3 30 37 Left 0
SYMATTR InstName Q3
SYMATTR Value 2N2907
SYMBOL pnp 128 48 M180
WINDOW 0 47 62 Left 0
WINDOW 3 44 40 Left 0
SYMATTR InstName Q4
SYMATTR Value 2N2907
SYMBOL res 176 -176 R0
WINDOW 3 35 65 Left 0
SYMATTR Value 100R
SYMATTR InstName R1
SYMBOL res -144 -176 R0
WINDOW 0 -67 41 Left 0
WINDOW 3 -67 63 Left 0
SYMATTR InstName R2
SYMATTR Value 100R
SYMBOL res 400 448 R0
WINDOW 0 36 48 Left 0
WINDOW 3 36 70 Left 0
SYMATTR InstName R3
SYMATTR Value 50m
SYMBOL res 16 464 R0
WINDOW 0 38 49 Left 0
WINDOW 3 37 72 Left 0
SYMATTR InstName R4
SYMATTR Value 220R
SYMBOL voltage 608 448 R0
WINDOW 0 38 48 Left 0
WINDOW 3 38 76 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 1V
SYMBOL voltage 720 448 R0
WINDOW 0 37 47 Left 0
WINDOW 3 38 70 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value +15V
SYMBOL voltage 864 448 R0
WINDOW 0 36 46 Left 0
WINDOW 3 36 68 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value -15V
SYMBOL res 384 336 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R5
SYMATTR Value 10R
SYMBOL voltage -656 416 R0
WINDOW 0 40 43 Left 0
WINDOW 3 39 64 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V4
SYMATTR Value PULSE(5m 500m 0 10n 10n 10u 20u)
SYMBOL npn 256 144 M0
WINDOW 0 2 -35 Left 0
WINDOW 3 -43 -10 Left 0
SYMATTR InstName Q5
SYMATTR Value 2N2222
SYMBOL voltage 992 448 R0
WINDOW 0 36 44 Left 0
WINDOW 3 37 63 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V5
SYMATTR Value 1V
SYMBOL res 960 176 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R9
SYMATTR Value 10R
SYMBOL res -256 336 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R6
SYMATTR Value 10R
SYMBOL Opamps\\1pole -512 80 R0
SYMATTR InstName U1
SYMATTR Value2 Avol=1Meg GBW=1Meg Slew=0.5Meg
SYMBOL cap -400 -112 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C1
SYMATTR Value 100n
SYMBOL res -256 64 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R7
SYMATTR Value 1K
SYMBOL res -448 -208 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R8
SYMATTR Value 10K
SYMBOL res -640 336 R180
WINDOW 0 36 76 Left 0
WINDOW 3 36 40 Left 0
SYMATTR InstName R11
SYMATTR Value 10K
SYMBOL res -496 -112 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R10
SYMATTR Value 10K
SYMBOL npn -64 144 M0
WINDOW 0 2 -35 Left 0
WINDOW 3 -43 -10 Left 0
SYMATTR InstName Q6
SYMATTR Value 2N2222
SYMBOL res 64 176 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R12
SYMATTR Value 10R
TEXT -664 592 Left 0 !.tran 0 500u 450u uic
TEXT -664 616 Left 0 ;.ac dec 20 1 10000K