Version 4
SHEET 1 880 680
WIRE -192 -624 -224 -624
WIRE -80 -624 -112 -624
WIRE -32 -624 -80 -624
WIRE 64 -624 32 -624
WIRE 240 -624 64 -624
WIRE 352 -624 320 -624
WIRE -80 -528 -80 -624
WIRE -48 -528 -80 -528
WIRE 64 -528 64 -624
WIRE 64 -528 32 -528
WIRE -16 -448 -16 -480
WIRE 64 -448 -16 -448
WIRE 176 -448 144 -448
WIRE -224 -288 -224 -624
WIRE -192 -288 -224 -288
WIRE -80 -288 -112 -288
WIRE -32 -288 -80 -288
WIRE 64 -288 32 -288
WIRE 240 -288 64 -288
WIRE 352 -288 352 -624
WIRE 352 -288 320 -288
WIRE -80 -192 -80 -288
WIRE -48 -192 -80 -192
WIRE 64 -192 64 -288
WIRE 64 -192 32 -192
WIRE -16 -96 -16 -144
WIRE 64 -96 -16 -96
WIRE 176 -96 176 -448
WIRE 176 -96 128 -96
WIRE -512 32 -544 32
WIRE -464 32 -512 32
WIRE -224 32 -224 -288
WIRE -224 32 -400 32
WIRE -192 32 -224 32
WIRE -48 32 -112 32
WIRE 240 32 32 32
WIRE 352 32 352 -288
WIRE 352 32 320 32
WIRE -544 96 -544 32
WIRE 240 128 240 112
WIRE -16 144 -16 80
WIRE 64 144 -16 144
WIRE 176 144 176 -96
WIRE 176 144 128 144
WIRE 208 144 176 144
WIRE 352 160 352 32
WIRE 352 160 272 160
WIRE 384 160 352 160
WIRE 528 160 448 160
WIRE 560 160 528 160
WIRE 208 176 176 176
WIRE 528 192 528 160
WIRE 240 208 240 192
WIRE -544 224 -544 176
WIRE 528 304 528 272
WIRE 176 320 176 176
WIRE 176 320 80 320
WIRE 224 320 176 320
WIRE 352 320 352 272
WIRE 352 320 304 320
WIRE 80 368 80 320
WIRE 176 368 176 320
WIRE 352 368 352 320
WIRE 80 480 80 432
WIRE 176 480 176 448
WIRE 352 480 352 448
FLAG 240 112 +V
FLAG -544 224 0
FLAG 560 160 out
FLAG -512 32 in
FLAG 352 480 0
FLAG 352 272 +V
FLAG 528 304 0
FLAG 240 208 0
FLAG 176 480 0
FLAG 80 480 0
SYMBOL Opamps\\UniversalOpamp2 240 160 R0
SYMATTR InstName U1
SYMBOL Misc\\EuropeanResistor 224 48 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R9
SYMATTR Value 2.2k
SYMBOL Misc\\EuropeanResistor 224 -272 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R8
SYMATTR Value 4.7k
SYMBOL Misc\\EuropeanResistor -208 -272 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R4
SYMATTR Value 4.7k
SYMBOL Misc\\EuropeanResistor -208 48 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R5
SYMATTR Value 2.2k
SYMBOL cap -32 -272 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C3
SYMATTR Value 47n
SYMBOL cap 64 -80 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C4
SYMATTR Value 22n
SYMBOL potentiometer 48 -208 R90
WINDOW 0 52 -2 VRight 2
WINDOW 3 -147 212 VLeft 2
SYMATTR InstName RP2
SYMATTR Value Rtot=100k wiper={pos2}
SYMBOL voltage -544 80 R0
WINDOW 123 24 124 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value2 AC 1
SYMATTR InstName V1
SYMATTR Value 0
SYMBOL Misc\\EuropeanResistor 224 -608 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R6
SYMATTR Value 10k
SYMBOL Misc\\EuropeanResistor -208 -608 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL cap -32 -608 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C2
SYMATTR Value 47n
SYMBOL potentiometer 48 -544 R90
WINDOW 0 52 -2 VRight 2
WINDOW 3 -149 225 VLeft 2
SYMATTR InstName RP1
SYMATTR Value Rtot=100k wiper={pos1}
SYMBOL potentiometer 48 16 R90
WINDOW 0 52 -2 VRight 2
WINDOW 3 -40 192 VLeft 2
SYMATTR InstName RP3
SYMATTR Value Rtot=470k wiper={pos3}
SYMBOL cap 64 160 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C5
SYMATTR Value 4.7n
SYMBOL Misc\\EuropeanResistor 48 -432 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R7
SYMATTR Value 10k
SYMBOL Misc\\EuropeanPolcap -464 48 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C1
SYMATTR Value 10µ
SYMBOL Misc\\EuropeanPolcap 384 176 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C6
SYMATTR Value 10µ
SYMBOL Misc\\EuropeanResistor 512 176 R0
SYMATTR InstName RLOAD
SYMATTR Value 4.7k
SYMBOL Misc\\EuropeanResistor 160 352 R0
SYMATTR InstName R2
SYMATTR Value 100k
SYMBOL Misc\\EuropeanResistor 208 336 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R1
SYMATTR Value 100k
SYMBOL Misc\\battery 352 352 R0
SYMATTR InstName V2
SYMATTR Value 9
SYMBOL Misc\\EuropeanPolcap 64 368 R0
SYMATTR InstName C7
SYMATTR Value 10µ
TEXT -512 456 Left 2 !.ac dec 100 10 10k
TEXT -512 408 Left 2 !.inc potentiometer.sub
TEXT -512 544 Left 2 !.step param pos1 list 0 0.25 0.5 0.75 1
TEXT -56 -208 Left 2 ;0
TEXT 24 -208 Left 2 ;1
TEXT -56 -544 Left 2 ;0
TEXT 24 -544 Left 2 ;1
TEXT -56 -544 Left 2 ;0
TEXT 24 -544 Left 2 ;1
TEXT 96 -536 Left 2 ;LOW
TEXT 96 -200 Left 2 ;MID
TEXT 80 64 Left 2 ;HIGH
TEXT -512 496 Left 2 !.param pos1=0.5 pos2=0.5 pos3=0.5
TEXT -512 584 Left 2 !.step param pos2 list 0 0.25 0.5 0.75 1
TEXT -512 624 Left 2 !.step param pos3 list 0 0.25 0.5 0.75 1
TEXT -456 -752 Left 2 ;http://www.dieelektronikerseite.de/Circuits/3%20Band%20Equalizer.htm