Version 4
SHEET 1 3928 1672
WIRE 880 -592 816 -592
WIRE 1040 -592 960 -592
WIRE 1040 -464 1040 -592
WIRE 1072 -464 1040 -464
WIRE 1328 -464 1152 -464
WIRE 1408 -464 1328 -464
WIRE 1520 -464 1488 -464
WIRE 944 -448 944 -464
WIRE 1040 -432 1040 -464
WIRE 1040 -432 976 -432
WIRE 576 -416 496 -416
WIRE 816 -416 816 -592
WIRE 816 -416 656 -416
WIRE 912 -416 816 -416
WIRE 1040 -400 976 -400
WIRE 944 -352 944 -384
WIRE 1040 -352 1040 -400
WIRE 1072 -352 1040 -352
WIRE 1232 -352 1152 -352
WIRE 1408 -352 1232 -352
WIRE 1520 -352 1488 -352
WIRE 1040 -336 1040 -352
WIRE 1232 -288 1232 -352
WIRE 1328 -288 1328 -464
WIRE 1040 -192 1040 -256
WIRE 496 -64 496 -416
WIRE 512 -64 496 -64
WIRE 608 -64 576 -64
WIRE 2048 16 2000 16
WIRE 2064 16 2048 16
WIRE 2448 16 2320 16
WIRE 2480 16 2448 16
WIRE 2576 16 2544 16
WIRE 2624 16 2576 16
WIRE 2784 16 2688 16
WIRE 2000 32 2000 16
WIRE 544 64 544 48
WIRE 2448 64 2448 16
WIRE 2576 64 2576 16
WIRE 64 80 16 80
WIRE 304 80 144 80
WIRE 496 80 496 -64
WIRE 496 80 384 80
WIRE 512 80 496 80
WIRE 1504 80 1504 32
WIRE 2064 80 2064 16
WIRE 2080 80 2064 80
WIRE 2320 80 2320 16
WIRE 2320 80 2304 80
WIRE 608 96 608 -64
WIRE 608 96 576 96
WIRE 672 96 608 96
WIRE 1104 96 752 96
WIRE 512 112 496 112
WIRE 1104 112 1104 96
WIRE 1152 112 1104 112
WIRE 1264 128 1264 0
WIRE 1264 128 1216 128
WIRE 1312 128 1264 128
WIRE 1424 128 1392 128
WIRE 1712 128 1584 128
WIRE 2000 128 2000 112
WIRE 544 144 544 128
WIRE 1152 144 1104 144
WIRE 1424 176 1392 176
WIRE 2048 176 1600 176
WIRE 2080 176 2048 176
WIRE 2384 176 2304 176
WIRE 2512 176 2384 176
WIRE 2576 176 2576 144
WIRE 2576 176 2512 176
WIRE 2624 176 2576 176
WIRE 2784 176 2784 16
WIRE 2784 176 2704 176
WIRE 3056 176 2784 176
WIRE 2384 192 2384 176
WIRE 2784 192 2784 176
WIRE 3056 208 3056 176
WIRE 1104 256 1104 144
WIRE 1392 256 1392 176
WIRE 496 272 496 112
WIRE 1504 272 1504 224
WIRE 2080 272 2000 272
WIRE 2624 272 2304 272
WIRE 2736 272 2704 272
WIRE 2000 288 2000 272
WIRE 2384 320 2384 256
WIRE 2384 320 2320 320
WIRE 2448 320 2448 144
WIRE 2448 320 2384 320
WIRE 2784 320 2784 288
WIRE 2784 320 2448 320
WIRE 3056 320 3056 288
WIRE 2784 352 2784 320
WIRE 2864 352 2784 352
WIRE 2928 352 2928 -160
WIRE 2928 352 2864 352
WIRE 2944 352 2928 352
WIRE 3056 352 3024 352
WIRE 3136 352 3056 352
WIRE 3248 352 3136 352
WIRE 2000 368 2000 352
WIRE 2080 368 2000 368
WIRE 2320 368 2320 320
WIRE 2320 368 2304 368
WIRE 2512 368 2512 176
WIRE 2864 368 2864 352
WIRE 3056 368 3056 352
WIRE 2000 384 2000 368
WIRE 2080 464 2000 464
WIRE 2384 464 2304 464
WIRE 2512 464 2512 432
WIRE 2512 464 2384 464
WIRE 2544 464 2512 464
WIRE 2656 464 2624 464
WIRE 2672 464 2656 464
WIRE 2864 464 2864 448
WIRE 3056 464 3056 432
WIRE 2384 480 2384 464
WIRE 2784 480 2784 352
WIRE 1856 544 1808 544
WIRE 1904 544 1856 544
WIRE 1904 560 1904 544
WIRE 2000 560 2000 544
WIRE 2080 560 2000 560
WIRE 2624 560 2304 560
WIRE 2736 560 2704 560
WIRE 2384 608 2384 544
WIRE 2384 608 2320 608
WIRE 2784 608 2784 576
WIRE 2784 608 2384 608
WIRE 1808 624 1808 544
WIRE 2784 640 2784 608
WIRE 1904 656 1904 640
WIRE 2080 656 1904 656
WIRE 2320 656 2320 608
WIRE 2320 656 2304 656
WIRE 1904 672 1904 656
WIRE 2000 672 2000 560
WIRE 3248 720 3248 352
WIRE 3136 736 3136 352
WIRE 1808 768 1808 704
WIRE 1904 768 1904 752
WIRE 1904 768 1808 768
WIRE 2000 768 2000 752
WIRE 2000 768 1904 768
WIRE 2320 768 2320 656
WIRE 2320 768 2000 768
WIRE 0 912 0 816
WIRE 128 912 128 816
WIRE 256 912 256 816
WIRE 352 912 352 816
WIRE 2048 912 2000 912
WIRE 2064 912 2048 912
WIRE 2448 912 2320 912
WIRE 2480 912 2448 912
WIRE 2576 912 2544 912
WIRE 2624 912 2576 912
WIRE 2784 912 2688 912
WIRE 2000 928 2000 912
WIRE 2448 960 2448 912
WIRE 2576 960 2576 912
WIRE 2064 976 2064 912
WIRE 2080 976 2064 976
WIRE 2320 976 2320 912
WIRE 2320 976 2304 976
WIRE 2000 1024 2000 1008
WIRE 0 1040 0 992
WIRE 128 1040 128 992
WIRE 256 1040 256 992
WIRE 352 1040 352 992
WIRE 1712 1072 1712 128
WIRE 2080 1072 1712 1072
WIRE 2384 1072 2304 1072
WIRE 2512 1072 2384 1072
WIRE 2576 1072 2576 1040
WIRE 2576 1072 2512 1072
WIRE 2624 1072 2576 1072
WIRE 2784 1072 2784 912
WIRE 2784 1072 2704 1072
WIRE 3056 1072 2784 1072
WIRE 2384 1088 2384 1072
WIRE 2784 1088 2784 1072
WIRE 3056 1104 3056 1072
WIRE 2080 1168 2000 1168
WIRE 2624 1168 2304 1168
WIRE 2736 1168 2704 1168
WIRE 2000 1184 2000 1168
WIRE 2384 1216 2384 1152
WIRE 2384 1216 2320 1216
WIRE 2448 1216 2448 1040
WIRE 2448 1216 2384 1216
WIRE 2784 1216 2784 1184
WIRE 2784 1216 2448 1216
WIRE 3056 1216 3056 1184
WIRE 2784 1248 2784 1216
WIRE 2864 1248 2784 1248
WIRE 2944 1248 2864 1248
WIRE 3056 1248 3024 1248
WIRE 3136 1248 3136 800
WIRE 3136 1248 3056 1248
WIRE 3248 1248 3248 800
WIRE 3248 1248 3136 1248
WIRE 2000 1264 2000 1248
WIRE 2080 1264 2000 1264
WIRE 2320 1264 2320 1216
WIRE 2320 1264 2304 1264
WIRE 2512 1264 2512 1072
WIRE 3056 1264 3056 1248
WIRE 2000 1280 2000 1264
WIRE 2864 1280 2864 1248
WIRE 2080 1360 2000 1360
WIRE 2384 1360 2304 1360
WIRE 2512 1360 2512 1328
WIRE 2512 1360 2384 1360
WIRE 2544 1360 2512 1360
WIRE 2656 1360 2624 1360
WIRE 2672 1360 2656 1360
WIRE 3056 1360 3056 1328
WIRE 2384 1376 2384 1360
WIRE 2784 1376 2784 1248
WIRE 1856 1440 1808 1440
WIRE 1904 1440 1856 1440
WIRE 1904 1456 1904 1440
WIRE 2000 1456 2000 1440
WIRE 2080 1456 2000 1456
WIRE 2624 1456 2304 1456
WIRE 2736 1456 2704 1456
WIRE 2384 1504 2384 1440
WIRE 2384 1504 2320 1504
WIRE 2784 1504 2784 1472
WIRE 2784 1504 2384 1504
WIRE 1808 1520 1808 1440
WIRE 2784 1536 2784 1504
WIRE 1904 1552 1904 1536
WIRE 2080 1552 1904 1552
WIRE 2320 1552 2320 1504
WIRE 2320 1552 2304 1552
WIRE 1904 1568 1904 1552
WIRE 2000 1568 2000 1456
WIRE 1808 1664 1808 1600
WIRE 1904 1664 1904 1648
WIRE 1904 1664 1808 1664
WIRE 2000 1664 2000 1648
WIRE 2000 1664 1904 1664
WIRE 2320 1664 2320 1552
WIRE 2320 1664 2000 1664
FLAG 256 1040 0
FLAG 256 816 +5V
IOPIN 256 816 Out
FLAG 16 80 0
FLAG 1024 256 0
FLAG 1184 256 +5V
IOPIN 1184 256 Out
FLAG 1184 160 0
FLAG 1184 96 +5V
IOPIN 1184 96 Out
FLAG 1504 272 0
FLAG 1392 336 0
FLAG 1504 32 0
FLAG 1856 544 Vc
FLAG 2048 16 Vdd
FLAG 2000 384 0
FLAG 3056 320 0
FLAG 2000 128 0
FLAG 2656 464 Vc
FLAG 2048 176 In
FLAG 2784 640 0
FLAG 3056 1216 0
FLAG 2656 1360 Vc2
FLAG 2784 1536 0
FLAG 1856 1440 Vc2
FLAG 2000 1280 0
FLAG 2048 912 Vdd2
FLAG 2000 1024 0
FLAG 3056 1360 0
FLAG 3056 464 0
FLAG 128 1040 0
FLAG 0 1040 0
FLAG 128 816 -10V
FLAG 0 816 10V
FLAG 2864 1360 0
FLAG 2864 464 0
FLAG 1264 -80 +5V
IOPIN 1264 -80 Out
FLAG 2928 -160 OUT1
FLAG 2864 1248 OUT2
FLAG 352 1040 0
FLAG 352 816 -5V
IOPIN 352 816 Out
FLAG 1520 -464 OUT2
FLAG 1520 -352 OUT1
FLAG 1232 -208 0
FLAG 1328 -208 0
FLAG 1040 -192 0
FLAG 944 -464 10V
FLAG 944 -352 -10V
FLAG 544 48 10V
FLAG 544 144 -10V
FLAG 496 272 0
SYMBOL voltage 256 896 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL voltage 160 80 R90
WINDOW 0 -32 56 VBottom 2
WINDOW 3 32 56 VTop 2
WINDOW 123 60 56 VTop 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value SINE(0 0 1k)
SYMATTR Value2 AC 1 0
SYMBOL cap 576 -80 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 1n
SYMATTR SpiceLine V=50 Irms=6.038 Rser=0.017 Lser=0
SYMBOL res 768 80 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 4k7
SYMBOL res 1200 240 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R8
SYMATTR Value 10k
SYMBOL res 1120 240 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R9
SYMATTR Value 10k
SYMBOL res 1408 112 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R10
SYMATTR Value 1k
SYMBOL Digital\\dflop 1504 80 R0
WINDOW 3 46 182 Left 2
SYMATTR Value vhigh=5
SYMATTR InstName A2
SYMBOL voltage 1392 240 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value PULSE(0 5 0 1n 1n 0.00004000m 0.00008000m)
SYMBOL voltage 2000 16 M0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V5
SYMATTR Value 10
SYMBOL cap 2016 288 M0
SYMATTR InstName C4
SYMATTR Value 1n
SYMBOL voltage 1808 608 M0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V6
SYMATTR Value 12
SYMBOL res 1920 656 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R17
SYMATTR Value 10meg
SYMBOL res 1920 768 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R18
SYMATTR Value 3300
SYMBOL res 2016 560 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R19
SYMATTR Value 7k5
SYMBOL res 2016 768 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R20
SYMATTR Value 2k4
SYMBOL polcap 2368 192 R0
WINDOW 3 24 64 Left 2
SYMATTR Value 10µ
SYMATTR InstName C5
SYMATTR Description Capacitor
SYMATTR Type cap
SYMATTR SpiceLine V=25 Irms=39m Rser=2.8 MTBF=1000 Lser=0 mfg="Nichicon" pn="UPR1E100MAH" type="Al electrolytic" ppPkg=1
SYMBOL res 2432 48 R0
SYMATTR InstName R21
SYMATTR Value 3k3
SYMBOL diode 2544 0 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL res 2560 48 R0
SYMATTR InstName R22
SYMATTR Value 10k
SYMBOL diode 2624 32 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D2
SYMATTR Value MURS120
SYMBOL res 2720 160 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R23
SYMATTR Value 33k
SYMBOL res 2720 256 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R24
SYMATTR Value 10
SYMBOL nmos 2736 192 R0
SYMATTR InstName Q1
SYMATTR Value Si4490DY
SYMBOL polcap 2368 480 R0
WINDOW 3 24 64 Left 2
SYMATTR Value 22µ
SYMATTR InstName C6
SYMATTR Description Capacitor
SYMATTR Type cap
SYMATTR SpiceLine V=25 Irms=60m Rser=2.4 MTBF=1000 Lser=0 mfg="Nichicon" pn="UPR1E220MAH" type="Al electrolytic" ppPkg=1
SYMBOL diode 2528 432 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D3
SYMATTR Value MURS120
SYMBOL res 2640 448 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R25
SYMATTR Value 33
SYMBOL res 2720 544 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R26
SYMATTR Value 10
SYMBOL nmos 2736 480 R0
SYMATTR InstName Q2
SYMATTR Value Si4490DY
SYMBOL voltage 3056 192 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V7
SYMATTR Value 30
SYMBOL ind 2928 368 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 10µ
SYMATTR SpiceLine Ipk=10 Rser=0.016 Rpar=10k Cpar=0
SYMBOL cap 3040 368 R0
SYMATTR InstName C7
SYMATTR Value 470n
SYMBOL res 3232 704 R0
SYMATTR InstName R27
SYMATTR Value 3.3
SYMBOL IRS20954 2192 1264 R0
SYMATTR InstName X2
SYMBOL IRS20954 2192 368 R0
SYMATTR InstName X1
SYMBOL polcap 2368 1088 R0
WINDOW 3 24 64 Left 2
SYMATTR Value 10µ
SYMATTR InstName C8
SYMATTR Description Capacitor
SYMATTR Type cap
SYMATTR SpiceLine V=25 Irms=39m Rser=2.8 MTBF=1000 Lser=0 mfg="Nichicon" pn="UPR1E100MAH" type="Al electrolytic" ppPkg=1
SYMBOL res 2432 944 R0
SYMATTR InstName R13
SYMATTR Value 3k3
SYMBOL diode 2544 896 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D4
SYMATTR Value 1N4148
SYMBOL res 2560 944 R0
SYMATTR InstName R16
SYMATTR Value 10k
SYMBOL diode 2624 928 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D5
SYMATTR Value MURS120
SYMBOL res 2720 1056 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R28
SYMATTR Value 33k
SYMBOL res 2720 1152 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R29
SYMATTR Value 10
SYMBOL nmos 2736 1088 R0
SYMATTR InstName Q3
SYMATTR Value Si4490DY
SYMBOL polcap 2368 1376 R0
WINDOW 3 24 64 Left 2
SYMATTR Value 22µ
SYMATTR InstName C9
SYMATTR Description Capacitor
SYMATTR Type cap
SYMATTR SpiceLine V=25 Irms=60m Rser=2.4 MTBF=1000 Lser=0 mfg="Nichicon" pn="UPR1E220MAH" type="Al electrolytic" ppPkg=1
SYMBOL diode 2528 1328 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D6
SYMATTR Value MURS120
SYMBOL res 2640 1344 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R30
SYMATTR Value 33
SYMBOL res 2720 1440 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R31
SYMATTR Value 10
SYMBOL nmos 2736 1376 R0
SYMATTR InstName Q4
SYMATTR Value Si4490DY
SYMBOL voltage 3056 1088 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V4
SYMATTR Value 30
SYMBOL ind 2928 1264 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L2
SYMATTR Value 10µ
SYMATTR SpiceLine Ipk=10 Rser=0.016 Rpar=10k Cpar=0
SYMBOL cap 3040 1264 R0
SYMATTR InstName C10
SYMATTR Value 470n
SYMBOL voltage 1808 1504 M0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V8
SYMATTR Value 12
SYMBOL res 1920 1552 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R33
SYMATTR Value 10meg
SYMBOL res 1920 1664 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R34
SYMATTR Value 3300
SYMBOL res 2016 1456 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R35
SYMATTR Value 7k5
SYMBOL res 2016 1664 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R36
SYMATTR Value 2k4
SYMBOL cap 2016 1184 M0
SYMATTR InstName C12
SYMATTR Value 1n
SYMBOL voltage 2000 912 M0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V9
SYMATTR Value 10
SYMBOL voltage 128 896 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V10
SYMATTR Value -10
SYMBOL voltage 0 896 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V11
SYMATTR Value 10
SYMBOL res 400 64 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 4k7
SYMBOL res 2848 1264 R0
SYMATTR InstName R47
SYMATTR Value 10k
SYMBOL cap 3120 736 R0
SYMATTR InstName C3
SYMATTR Value 100n
SYMBOL res 2848 352 R0
SYMATTR InstName R41
SYMATTR Value 10k
SYMBOL Opamps\\LT1212 544 32 R0
SYMATTR InstName U2
SYMBOL res 1280 16 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R14
SYMATTR Value 1k
SYMBOL Comparators\\LM339 1184 64 R0
SYMATTR InstName U1
SYMBOL voltage 352 896 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V12
SYMATTR Value -5
SYMBOL res 976 -608 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R42
SYMATTR Value 2k2
SYMBOL res 1504 -368 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R43
SYMATTR Value 680
SYMBOL res 1504 -480 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R44
SYMATTR Value 680
SYMBOL res 1168 -480 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R45
SYMATTR Value 2k2
SYMBOL res 1056 -240 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R46
SYMATTR Value 2k2
SYMBOL res 1248 -192 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R50
SYMATTR Value 100
SYMBOL res 1344 -192 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R51
SYMATTR Value 100
SYMBOL res 1168 -368 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R52
SYMATTR Value 2k2
SYMBOL Opamps\\UniversalOpamp2 944 -416 M0
SYMATTR InstName U4
SYMBOL res 672 -432 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R53
SYMATTR Value 47k
TEXT -24 360 Left 2 !.tran 0 20ms 0 100n
TEXT -32 400 Left 2 !.options plotwinsize=0
TEXT -32 440 Left 2 !;ac dec 101 1 200MEG
TEXT -24 488 Left 2 !.ic V(C3)=20