Version 4
SHEET 1 1716 1044
WIRE 256 -32 80 -32
WIRE 528 -32 320 -32
WIRE -272 96 -320 96
WIRE -144 96 -192 96
WIRE -48 96 -80 96
WIRE 32 96 -48 96
WIRE 80 96 80 -32
WIRE 80 96 32 96
WIRE 128 96 80 96
WIRE 304 96 192 96
WIRE 368 96 304 96
WIRE 416 96 368 96
WIRE 528 96 528 -32
WIRE 528 96 480 96
WIRE 560 96 528 96
WIRE 592 96 560 96
WIRE 720 96 672 96
WIRE 784 96 720 96
WIRE 912 96 864 96
WIRE 1040 96 912 96
WIRE 1168 96 1040 96
WIRE 1232 96 1168 96
WIRE 1360 96 1312 96
WIRE 1440 96 1360 96
WIRE 1040 112 1040 96
WIRE -48 128 -48 96
WIRE 304 128 304 96
WIRE 720 128 720 96
WIRE 912 128 912 96
WIRE 1168 128 1168 96
WIRE 1360 128 1360 96
WIRE -320 144 -320 96
WIRE 720 224 720 192
WIRE 912 224 912 192
WIRE 1040 224 1040 192
WIRE 1168 224 1168 208
WIRE 1360 224 1360 192
WIRE -48 240 -48 208
WIRE 80 240 80 96
WIRE 128 240 80 240
WIRE 240 240 192 240
WIRE 304 240 304 192
WIRE 304 240 240 240
WIRE 416 240 304 240
WIRE 528 240 528 96
WIRE 528 240 480 240
WIRE -320 256 -320 224
WIRE 240 320 240 240
WIRE 368 320 368 96
WIRE 1168 320 1168 288
WIRE 240 432 240 384
WIRE 368 432 368 384
WIRE 1600 640 1536 592
WIRE 1600 672 1600 640
WIRE 816 816 496 816
WIRE 656 896 496 896
FLAG 1360 224 0
FLAG 368 432 0
FLAG 240 432 0
FLAG -320 256 0
FLAG 560 96 4
FLAG -48 240 0
FLAG 720 224 0
FLAG 912 224 0
FLAG 1168 320 0
FLAG 1440 96 out
FLAG 1040 224 0
FLAG 32 96 1
FLAG 496 816 3
FLAG 496 896 2
FLAG 1600 672 0
FLAG 368 96 2
FLAG 240 240 3
SYMBOL diode 192 80 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D1
SYMATTR Value DX
SYMBOL diode 480 80 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D2
SYMATTR Value DX
SYMBOL diode 128 256 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D3
SYMATTR Value DX
SYMBOL diode 416 256 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D4
SYMATTR Value DX
SYMBOL cap 256 -16 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C2
SYMATTR Value 1n
SYMBOL cap 224 320 R0
SYMATTR InstName CS1
SYMATTR Value {CS1}
SYMBOL cap 352 320 R0
SYMATTR InstName CS2
SYMATTR Value {CS2}
SYMBOL voltage -320 128 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
WINDOW 3 -56 176 Left 2
SYMATTR InstName V1
SYMATTR Value PULSE(0 5 0 10n 10n 52.5n 125n)
SYMBOL res 1216 112 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R6
SYMATTR Value 10k
SYMBOL res -288 112 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName RG
SYMATTR Value 50
SYMBOL cap -144 112 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C1
SYMATTR Value 1n
SYMBOL res -64 112 R0
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL res 576 112 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R3
SYMATTR Value 330
SYMBOL cap 704 128 R0
SYMATTR InstName C3
SYMATTR Value 1n
SYMBOL ind 768 112 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 220µ
SYMBOL cap 896 128 R0
SYMATTR InstName C4
SYMATTR Value 1n
SYMBOL res 1152 112 R0
SYMATTR InstName R5
SYMATTR Value 330
SYMBOL cap 1152 224 R0
SYMATTR InstName C5
SYMATTR Value 1n
SYMBOL cap 1344 128 R0
SYMATTR InstName C6
SYMATTR Value 220p
SYMBOL res 1024 96 R0
SYMATTR InstName R4
SYMATTR Value 3.3k
SYMBOL cap 288 128 R0
SYMATTR InstName CS
SYMATTR Value 5p
TEXT -368 440 Left 2 !.param C0=10p CV=10p\n.param CS1=C0+CV*x\n.param CS2=C0-CV*x\n.param x=0.5
TEXT -368 568 Left 2 !.tran .1m
TEXT -368 600 Left 2 !.step param x 0.3 0.7 .05
TEXT 72 560 Left 2 !.meas V4 AVG V(out) from 50u to 100u
TEXT 72 520 Left 2 !.model DX D(Is=1p Rs=1 Cjo=1p Tt=2n)
TEXT -368 656 Left 2 !.meas VOUT FIND V(out) WHEN time=95u
TEXT 200 56 Left 2 ;CS : Sreukapazität
TEXT -256 -176 Left 5 ;Capacitive Sensor Circuit
TEXT 896 -24 Left 5 ;1k...5kOhm ?
LINE Normal 944 752 944 368
LINE Normal 1152 560 752 560
LINE Normal 1056 896 1056 725
LINE Normal 1200 816 816 816
LINE Normal 1200 448 1200 816
LINE Normal 1111 448 1200 448
LINE Normal 1056 896 656 896
LINE Normal 688 450 688 896
LINE Normal 688 450 786 450
LINE Normal 816 816 816 699
LINE Normal 1492 768 1492 624
LINE Normal 1492 512 1492 368
LINE Normal 1435 559 1295 559
LINE Normal 1684 559 1542 559
RECTANGLE Normal -160 288 -400 16 2
CIRCLE Normal 1136 288 976 48 2
CIRCLE Normal 1152 752 752 368
CIRCLE Normal 1546 625 1434 513
ARC Normal 1296 368 1696 768 1294 558 1491 762
ARC Normal 1686 765 1286 365 1685 557 1491 371