Version 4
SHEET 1 2252 1120
WIRE 352 -640 224 -640
WIRE 480 -640 352 -640
WIRE 608 -640 480 -640
WIRE 848 -640 608 -640
WIRE 928 -640 848 -640
WIRE 1040 -640 928 -640
WIRE 1120 -640 1040 -640
WIRE 2192 -640 1120 -640
WIRE 848 -576 848 -640
WIRE 608 -512 608 -640
WIRE 1040 -512 1040 -640
WIRE 848 -448 848 -496
WIRE 848 -352 848 -368
WIRE 848 -352 816 -352
WIRE 928 -288 928 -640
WIRE 864 -240 720 -240
WIRE 1104 -192 928 -192
WIRE 1184 -192 1104 -192
WIRE 1424 -192 1264 -192
WIRE 32 -176 -224 -176
WIRE 816 -144 816 -352
WIRE -336 -128 -384 -128
WIRE -224 -128 -224 -176
WIRE -224 -128 -256 -128
WIRE -64 -128 -128 -128
WIRE 32 -128 32 -176
WIRE 608 -128 608 -432
WIRE 720 -128 720 -240
WIRE 720 -128 608 -128
WIRE 608 -80 608 -128
WIRE 1104 -80 1104 -192
WIRE 1152 -80 1104 -80
WIRE 1280 -80 1232 -80
WIRE 2192 -80 2192 -640
WIRE 1040 -64 1040 -432
WIRE 1152 -64 1040 -64
WIRE 1232 -64 1232 -80
WIRE 1280 -64 1232 -64
WIRE 720 -48 720 -128
WIRE 1120 -48 1120 -640
WIRE 1152 -48 1120 -48
WIRE 1280 -48 1264 -48
WIRE -176 -32 -176 -64
WIRE -16 -32 -16 -64
WIRE -16 -32 -176 -32
WIRE 1120 -32 1120 -48
WIRE 1152 -32 1120 -32
WIRE 1248 -32 1216 -32
WIRE 1264 -32 1264 -48
WIRE 1264 -32 1248 -32
WIRE 1280 -32 1264 -32
WIRE 1424 -32 1424 -192
WIRE 1424 -32 1344 -32
WIRE 1472 -32 1424 -32
WIRE 1520 -32 1472 -32
WIRE 1120 -16 1120 -32
WIRE 1152 -16 1120 -16
WIRE 816 0 816 -64
WIRE 816 0 784 0
WIRE 1120 0 1120 -16
WIRE 1168 0 1168 -16
WIRE 1168 0 1120 0
WIRE 608 16 608 -16
WIRE 1120 32 1120 0
WIRE 1232 32 1232 -64
WIRE 1232 32 1120 32
WIRE 1280 32 1280 -16
WIRE 1280 32 1232 32
WIRE 1296 32 1296 -16
WIRE 1296 32 1280 32
WIRE 2192 48 2192 0
WIRE 2192 48 2128 48
WIRE 2128 80 2128 48
WIRE -656 96 -752 96
WIRE -496 96 -576 96
WIRE 1040 96 1040 -64
WIRE 2192 96 2192 48
WIRE -752 112 -752 96
WIRE 224 128 224 -640
WIRE -752 144 -752 112
WIRE -752 144 -864 144
WIRE -496 144 -496 96
WIRE -144 144 -496 144
WIRE 608 144 608 80
WIRE 720 144 720 48
WIRE 720 144 608 144
WIRE 976 144 720 144
WIRE -864 160 -864 144
WIRE 720 176 720 144
WIRE 816 176 816 0
WIRE -752 192 -752 144
WIRE -656 192 -752 192
WIRE -496 192 -496 144
WIRE -496 192 -592 192
WIRE -384 192 -384 -128
WIRE -320 192 -384 192
WIRE -304 192 -320 192
WIRE -144 192 -144 144
WIRE -144 192 -224 192
WIRE 128 192 -144 192
WIRE 176 192 128 192
WIRE 480 224 480 -640
WIRE 608 224 608 144
WIRE 224 256 224 224
WIRE 224 272 224 256
WIRE 416 272 224 272
WIRE 720 272 720 256
WIRE 720 272 672 272
WIRE -384 288 -384 192
WIRE -864 304 -864 240
WIRE -16 304 -16 -32
WIRE 224 320 224 272
WIRE 544 320 480 320
WIRE 608 320 544 320
WIRE 720 320 720 272
WIRE 816 320 816 240
WIRE 848 320 848 -272
WIRE 1040 320 1040 192
WIRE 544 432 544 320
WIRE -16 464 -16 384
WIRE -384 480 -384 352
WIRE 352 480 352 -640
WIRE 1248 496 1248 -32
WIRE -320 608 -320 192
WIRE 352 608 352 560
WIRE 352 608 -320 608
WIRE 1104 608 352 608
WIRE 1248 608 1248 576
WIRE 1248 608 1104 608
WIRE 1248 640 1248 608
WIRE 1104 656 1104 608
WIRE 1104 752 1104 720
WIRE 224 928 224 400
WIRE 544 928 544 512
WIRE 544 928 224 928
WIRE 1248 928 1248 720
WIRE 1248 928 544 928
WIRE 2192 928 2192 176
WIRE 2192 928 1248 928
FLAG -16 464 0
FLAG -384 480 0
FLAG 2128 80 0
FLAG -864 304 0
FLAG -752 112 INPUT
IOPIN -752 112 In
FLAG 224 256 IMPEDANZ
FLAG 128 192 J-GATE
FLAG 720 320 0
FLAG 816 320 0
FLAG 1040 320 0
FLAG 1472 -32 INTMOUT
FLAG 848 320 0
FLAG 1104 752 0
SYMBOL njf 176 128 R0
SYMATTR InstName J1
SYMATTR Value BF245C
SYMATTR Prefix ""
SYMBOL npn -128 -64 M270
SYMATTR InstName Q1
SYMATTR Value BC337-40
SYMBOL npn -64 -64 R270
SYMATTR InstName Q2
SYMATTR Value BC337-40
SYMBOL res -32 288 R0
SYMATTR InstName R1
SYMATTR Value 4k7
SYMBOL res -240 -144 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 8k2
SYMBOL res -208 176 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 1000k
SYMBOL cap -400 288 R0
SYMATTR InstName C1
SYMATTR Value 22n
SYMBOL voltage 2192 -96 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL voltage 2192 80 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 5
SYMBOL res 208 304 R0
SYMATTR InstName R4
SYMATTR Value 700
SYMBOL res -560 80 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 47k
SYMBOL cap -592 176 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 100p
SYMBOL voltage -864 144 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value SINE(0 5.2 500k 0)
SYMBOL npn 416 224 R0
SYMATTR InstName Q3
SYMBOL npn 672 224 M0
SYMATTR InstName Q4
SYMBOL res 528 416 R0
SYMATTR InstName R6
SYMATTR Value 270
SYMBOL res 592 -528 R0
SYMATTR InstName R7
SYMATTR Value 330
SYMBOL diode 592 16 R0
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL diode 592 -80 R0
SYMATTR InstName D2
SYMATTR Value 1N4148
SYMBOL npn 784 -48 M0
SYMATTR InstName Q5
SYMBOL res 800 -160 R0
SYMATTR InstName R8
SYMATTR Value 10k
SYMBOL res 832 -592 R0
SYMATTR InstName R9
SYMATTR Value 2k2
SYMBOL npn 864 -288 R0
SYMATTR InstName Q6
SYMBOL cap 800 176 R0
SYMATTR InstName C3
SYMATTR Value 22p
SYMBOL res 704 160 R0
SYMATTR InstName R11
SYMATTR Value 330
SYMBOL pnp 976 96 R0
SYMATTR InstName Q7
SYMBOL res 1024 -528 R0
SYMATTR InstName R12
SYMATTR Value 10k
SYMBOL Digital\\and 1184 -112 R0
SYMATTR InstName A1
SYMBOL Digital\\and 1312 -112 R0
SYMATTR InstName A2
SYMBOL res 1280 -208 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R13
SYMATTR Value 390
SYMBOL res 1232 480 R0
SYMATTR InstName R14
SYMATTR Value 20k
SYMBOL res 1232 624 R0
SYMATTR InstName R15
SYMATTR Value 68k
SYMBOL res 336 464 R0
SYMATTR InstName R16
SYMATTR Value 120k
SYMBOL res 832 -464 R0
SYMATTR InstName R10
SYMATTR Value {4.7k * (1-a)}
SYMBOL res 832 -368 R0
SYMATTR InstName R17
SYMATTR Value {4.7k * a}
SYMBOL cap 1088 656 R0
SYMATTR InstName C4
SYMATTR Value 10µ
TEXT -304 720 Left 2 !.tran 0 10ms 9.8ms
TEXT -312 752 Left 2 !.include jfet.lib
TEXT -208 -432 Left 2 !.param a = 00.5